CN113131445B - Power supply protection device and control method thereof - Google Patents
Power supply protection device and control method thereof Download PDFInfo
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- CN113131445B CN113131445B CN202110347601.XA CN202110347601A CN113131445B CN 113131445 B CN113131445 B CN 113131445B CN 202110347601 A CN202110347601 A CN 202110347601A CN 113131445 B CN113131445 B CN 113131445B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
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Abstract
The embodiment of the application discloses a power supply protection device and a control method of the power supply protection device, wherein the power supply protection device comprises: the first alternating current input connection, the second alternating current input connection, the electric control device, the first control circuit, the first output port and the second output port; the public end of the electric control device is connected with a live wire of an alternating current power grid, and the first end of the electric control device is connected with the first output port through a first alternating current input wiring; the first end of the first control circuit is connected with the first alternating current input connection wire, the second end of the first control circuit is connected with the second alternating current input connection wire, and the second end of the first control circuit is grounded; the first end of the coil of the electric control device is connected with the control end of the first control circuit, and the second end of the coil of the electric control device is connected with the second alternating current input wiring; the second alternating current input wiring is connected with a zero line and a second output port of the alternating current power grid.
Description
Technical Field
The present disclosure relates to, but not limited to, the field of power supply safety technologies, and in particular, to a power supply protection device and a control method of the power supply protection device.
Background
The overvoltage protection of the switching power supply used in the related art is that when the output voltage of the power supply module is higher than the specification value of the output voltage, a protection circuit in the power supply can enable the power supply module to disconnect the output voltage of the power supply so as to prevent the high voltage output by the power supply module from damaging equipment connected with the output end of the power supply module.
However, this protection only protects the devices connected to the output of the power supply module. When the input voltage of the alternating current power grid is too high, even if the power supply module is disconnected from the output voltage, the equipment connected with the output end cannot be damaged, the too high alternating current voltage is still input to the power supply module, and the parts in the power supply module bear the too high voltage and are often damaged. It is therefore desirable to provide a device that at least protects the power module from overvoltage.
Disclosure of Invention
The technical scheme of the application is realized as follows:
a power supply protection device, the device comprising: the first alternating current input connection, the second alternating current input connection, the electric control device, the first control circuit, the first output port and the second output port; wherein,
the public end of the electric control device is connected with a live wire of an alternating current power grid, and the first end of the electric control device is connected with the first output port through the first alternating current input wiring;
the first end of the first control circuit is connected with the first alternating current input connection wire, the second end of the first control circuit is connected with the second alternating current input connection wire, and the second end of the first control circuit is grounded;
a first end of a coil of the electric control device is connected with a control end of the first control circuit, and a second end of the coil of the electric control device is connected with the second alternating current input wiring;
the second alternating current input wiring is connected with a zero line of the alternating current power grid and the second output port;
the first control circuit is used for controlling the common end of the electric control device to be attracted with the first end of the electric control device and connecting the power supply module to the alternating current power grid if the voltage input into the power supply protection device by the alternating current power grid is within a voltage threshold range when the power supply protection device is connected with the power supply module.
A control method of a power protection device, the control method being applied to the power protection device, the method comprising:
when the power supply protection device is connected with the power supply module, if the voltage input into the power supply protection device by the alternating current power grid is within the voltage threshold range, the common end of the electric control device of the power supply protection device is controlled to be attracted with the first end of the electric control device, and the power supply module is connected into the alternating current power grid.
The application provides a power supply protection device and a control method of the power supply protection device, wherein the power supply protection device comprises: the first alternating current input connection, the second alternating current input connection, the electric control device, the first control circuit, the first output port and the second output port; the public end of the electric control device is connected with a live wire of an alternating current power grid, and the first end of the electric control device is connected with the first output port through a first alternating current input wiring; the first end of the first control circuit is connected with the first alternating current input connection wire, the second end of the first control circuit is connected with the second alternating current input connection wire, and the second end of the first control circuit is grounded; the first end of the coil of the electric control device is connected with the control end of the first control circuit, and the second end of the coil of the electric control device is connected with the second alternating current input wiring; the second alternating current input wiring is connected with a zero line and a second output port of the alternating current power grid; the first control circuit is used for controlling the common end of the electric control device to be attracted with the first end of the electric control device and connecting the power supply module to the alternating current power grid if the voltage input into the power supply protection device by the alternating current power grid is within the voltage threshold range when the power supply protection device is connected with the power supply module; that is to say, the power protection device that this application provided connects between alternating current electric wire netting and power module, under the condition that alternating current electric wire netting input power protection device's voltage is in the voltage threshold value within range, just control the first end actuation of electric control device's public end and electric control device, insert the alternating current electric wire netting with power module, thereby realize carrying out overvoltage protection to power module, the consumer of power module rear end has also been protected simultaneously, power module's life has been prolonged, power module's safety in utilization has been promoted.
Drawings
Fig. 1 is a schematic structural diagram of an alternative power protection device provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an alternative power protection apparatus for connecting a power module to an ac power grid according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating that the TVS is turned on by breakdown and the C1 is charged in the power protection device according to the embodiment of the present application;
fig. 4 is a schematic diagram illustrating an overvoltage prompting module in a power protection device according to an embodiment of the present application for performing overvoltage prompting;
fig. 5 is a schematic structural diagram of a second control circuit in an alternative power protection apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a third switch circuit in an alternative power protection apparatus according to an embodiment of the present application;
fig. 7 is an operation schematic diagram illustrating a second switch circuit in an alternative power protection device according to an embodiment of the present application being continuously turned on;
fig. 8 is a schematic diagram illustrating an alternative operation of the power protection apparatus for safely connecting the power module to the ac power grid when the ac input is overvoltage, according to an embodiment of the present application;
fig. 9 is an optional operation diagram for controlling the ac power grid input to supply power to the power module by controlling the S1 to be turned on or off according to the embodiment of the present application;
fig. 10 is a schematic flowchart of an alternative control method of a power protection device according to an embodiment of the present application;
fig. 11 is a schematic flowchart of an alternative control method for a power protection device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the application.
Referring to fig. 1, an embodiment of the present application provides a power protection device 10, including:
a first ac input connection 11, a second ac input connection 12, an electric control device 13, a first control circuit 14, a first output port 15 and a second output port 16; wherein,
the common terminal 131 of the electric control device is connected to the live line 31 of the alternating current power grid, and the first terminal 132 of the electric control device is connected to the first output port 15 via the first alternating current input connection 11;
the first end 141 of the first control circuit is connected with the first ac input connection 11, the second end 142 of the first control circuit is connected with the second ac input connection 12, and the second end 142 of the first control circuit is grounded;
a first end 134 of the coil of the electric control device 13 is connected to a control end 143 of the first control circuit 14, and a second end 135 of the coil of the electric control device 13 is connected to the second ac input connection 12;
the second ac input connection 12 is connected to a neutral line 32 of the ac power grid and to the second output port 16;
the first control circuit 14 is configured to, when the power protection device 10 is connected to a power module (not shown in the figure), control the common terminal 131 of the electric control device to pull in the first terminal 132 of the electric control device to connect the power module to an ac power grid if a voltage input to the power protection device 10 from the ac power grid is within a voltage threshold range.
In the embodiment of the present application, the electric control device 13 includes, but is not limited to, an automatic switching element having an isolation function, for example, referring to fig. 1, the electric control device 13 is a Relay (Relay).
Referring to fig. 1 and 2, in the process that the Power supply protection device 10 provided by the present application connects the Power supply module to the ac Power grid, the input voltage of the ac Power grid may be processed by the rectifier circuit and then provided to the Power Supply Unit (PSU) module. Here, the rectifier circuit includes, but is not limited to, a bridge rectifier circuit, such as a rectifier bridge BD composed of four diode connections shown in fig. 2.
After the power module is connected to an ac power grid, power can be supplied to electric devices, including but not limited to mobile terminal devices such as mobile phones, tablet computers, notebook computers, personal Digital Assistants (PDAs), cameras, fixed terminal devices such as desktop computers, and servers.
The present application provides a power protection device 10, the power protection device 10 including: a first ac input connection 11, a second ac input connection 12, an electric control device 13, a first control circuit 14, a first output port 15 and a second output port 16; wherein the common terminal 131 of the electric control device is connected to the live line 31 of the alternating current electrical network, and the first terminal 132 of the electric control device is connected to the first output port 15 via the first alternating current input connection 11; the first end 141 of the first control circuit is connected with the first ac input connection 11, the second end 142 of the first control circuit is connected with the second ac input connection 12, and the second end 142 of the first control circuit is grounded; a first end 134 of the coil of the electric control device 13 is connected to a control end 143 of the first control circuit 14, and a second end 135 of the coil of the electric control device 13 is connected to the second ac input connection 12; the second ac input connection 12 is connected to a neutral line 32 of the ac power grid and to the second output port 16; the first control circuit 14 is configured to, when the power protection device 10 is connected to the power module, control the common terminal 131 of the electric control device to attract the first terminal 132 of the electric control device if the voltage input to the power protection device 10 by the ac power grid is within the voltage threshold range, and connect the power module to the ac power grid; that is to say, the power protection device 10 provided by the present application is connected between the ac power grid and the power module, and under the condition that the voltage input into the power protection device from the ac power grid is within the voltage threshold range, the common terminal 131 of the electric control device and the first terminal 132 of the electric control device are controlled to be attracted, and the power module is connected into the ac power grid, so as to implement overvoltage protection on the power module, and simultaneously protect the electric equipment at the rear end of the power module, thereby prolonging the service life of the power module, and improving the safety in use of the power module.
Referring to fig. 1 and 3, an embodiment of the present application provides a power protection device 10, including:
a first ac input connection 11, a second ac input connection 12, an electric control device 13, a first control circuit 14, a first output port 15 and a second output port 16; wherein,
the common terminal 131 of the electric control device is connected to the live line 31 of the alternating current power grid, and the first terminal 132 of the electric control device is connected to the first output port 15 via the first alternating current input connection 11;
the first end 141 of the first control circuit is connected to the first ac input connection 11, the second end 142 of the first control circuit is connected to the second ac input connection 12, and the second end 142 of the first control circuit is grounded;
a first end 134 of the coil of the electric control device 13 is connected to a control end 143 of the first control circuit 14, and a second end 135 of the coil of the electric control device 13 is connected to the second ac input connection 12;
the second ac input connection 12 is connected to a neutral line 32 of the ac power grid and to the second output port 16;
the first control circuit 14 is configured to, when the power protection device 10 is connected to a power module (not shown in the figure), control the common terminal 131 of the electric control device to pull in the first terminal 132 of the electric control device to connect the power module to an ac power grid if a voltage input to the power protection device 10 from the ac power grid is within a voltage threshold range.
In the embodiment of the present application, referring to fig. 1 and 3, the first control circuit 14 includes: a first switching circuit 144 and a first capacitor C1; wherein,
one end of the first switch circuit 144 is connected to the first ac input connection 11, the other end of the first switch circuit 144 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is connected to the second end 135 of the coil of the electric control device;
the first control circuit 14 is further configured to, when the power protection device 10 is connected to the power module, control the first switch circuit 144 to turn on to charge the first capacitor C1 if the voltage input to the power protection device 10 by the ac power grid exceeds the voltage threshold range; if the charged voltage of the first capacitor C1 is greater than the first voltage threshold, the common terminal 131 of the electric control device is controlled to be attracted to the second terminal 133 of the electric control device, and the connection between the alternating current power grid and the power module is disconnected.
In some embodiments, the first switching circuit 144 includes, but is not limited to, a diode, a transistor; for example, referring to fig. 1 and 3, when the selection diode realizes the function of the first switch circuit 144, a Transient Voltage regulator (TVS) may be selected to realize fast overvoltage protection for the power module.
In one achievable scenario, and as shown in connection with fig. 1 and 3, for example, when the peak voltage of the ac input to the ac power grid is less than 450V, the Root-Mean-Square value (Root-Mean-Square) of the ac input to the ac power grid is 320vac (u rms). At present, when the commercial power of a high-voltage country exceeds 264Vac or a preset certain voltage at most, the common end 131 of the control electric control device is attracted with the second end 133 of the control electric control device. The voltage provided by the alternating current power grid normally supplies power to the PSU through the Relay and the circuit of the thick line part, and the thin line part, namely the overvoltage protection circuit does not work. Of course, in practical applications, the voltage threshold range may be set according to requirements, and the application is not limited to this specifically.
However, when the peak voltage provided by the ac power grid is greater than 450V, the TVS will be breakdown and conductive, and the capacitor C1 of the Relay control coil is charged. When the voltage C1 is charged to be higher than 9V, the public end 131 of the Relay coil action control electric control device is attracted with the second end 133 of the electric control device, and the connection between the alternating current power grid and the power supply module is disconnected, so that the power supply module is protected from rapid overvoltage.
In the embodiment of the present application, referring to fig. 1 and 4, the power protection device 10 further includes: a third ac input connection 17, a second switching circuit 18, an overvoltage indication module 19 and a second control circuit 20; wherein,
the second end 133 of the electric control device is connected with the second switch circuit 18 and the overvoltage prompting module 19 in sequence through a third alternating current input connection 17;
one end of the second control circuit 20 is connected to the third ac input connection 17, the other end of the second control circuit 20 is connected to the second switch circuit 18, and the other end of the second control circuit 20 is grounded;
and the second control circuit 20 is further configured to control the second switch circuit 18 to be turned on to supply power to the overvoltage prompting module 19, so that the overvoltage prompting module 19 outputs overvoltage prompting information.
In the embodiment of the present application, the second switch circuit 18 includes, but is not limited to, a transistor Q1, and the overvoltage indication module 19 includes, but is not limited to, at least one of an audio indication module, a text indication module, and an indicator light indication module. Referring to fig. 1 and 4, for example, the second switch circuit 18 is Q1, and the overvoltage prompting module 19 is a buzzer (buzzer), when the common terminal 131 of the Relay coil action control electric control device is attracted to the second terminal 133 of the electric control device, the power supply of the ac power grid of the PSU is cut off, and the internal components of the PSU are prevented from being damaged by abnormal voltage. Meanwhile, the voltage provided by the alternating current power grid supplies power to the buzzer through the Q1, so that the buzzer alarms, and a user is prompted that the input voltage of the alternating current power grid has abnormal high voltage.
In the embodiment of the present application, referring to fig. 5 and 4, the second control circuit 20 includes: a first branch 201 and a second branch 202; wherein,
the first branch 201 includes a first voltage division module 2011 and a voltage stabilization module 2012; one end of the first voltage division module 2011 is connected with the third ac input connection 17, the other end of the first voltage division module 2011 is connected with the second branch 202 and one end of the voltage stabilizing module 2012 respectively, and the other end of the voltage stabilizing module 2012 is connected with the second ac input connection 12 and the ground respectively;
the second branch 202 includes a control module 2021, a first end of the control module 2021 is connected to the third ac input connection 17, a second end of the control module 2021 is connected to the second ac input connection 12 and the ground, respectively, and a control end of the control module 2021 is connected to the second switching circuit 18 through a connection point between the first voltage dividing module 2011 and the voltage stabilizing module 2012;
the control module 2021 is configured to control an input voltage of the ac power grid to pass through the first voltage dividing module 2011 and the voltage stabilizing module 2012, so that the second switch circuit 18 is continuously turned on to supply power to the overvoltage indication module 19.
In the embodiment of the present application, referring to fig. 5, the control module 2021 includes: a second voltage division block 221, a third voltage division block 222, a third switching circuit 223, and a second capacitor C2; wherein,
the second and third voltage division modules 221 and 222 are connected in series between the third ac input connection 17 and the second ac input connection 12;
a first end of the third switching circuit 223 and a second end of the third switching circuit 223 are connected to the third voltage dividing module 222 in parallel, and a third end of the third switching circuit 223 and a second end of the third switching circuit 223 are connected to the voltage stabilizing module 2012 in parallel;
one end of the second capacitor C2 is connected to a connection point between the second voltage dividing module 221 and the third voltage dividing module 222, and the other end of the second capacitor C2 is connected to the second ac input connection 12;
referring to fig. 5 and 6, the third switch circuit 223 is configured to disconnect the third terminal of the third switch circuit 223 from the second terminal of the third switch circuit 223 when the voltage provided by the ac power grid to the first terminal of the third switch circuit 223 and the second terminal of the third switch circuit 223 is greater than the second voltage threshold, so that the input voltage of the ac power grid passes through the first voltage dividing module 2011 and the voltage stabilizing module 2012.
In the embodiment of the present application, referring to fig. 1, 4, and 5, a voltage provided by an ac power grid is filtered by a second voltage dividing module 221 and C2 to become a direct current, and is divided by the second voltage dividing module 221/a third voltage dividing module 222 to be connected to a first end of a third switching circuit 223. When the voltage supplied by the ac power grid to the first terminal of the third switching circuit 223 and the second terminal of the third switching circuit 223 is greater than the second voltage threshold, the third terminal of the third switching circuit 223 and the second terminal of the third switching circuit 223 are disconnected. The voltage provided by the alternating current power grid enables the Q1 to be continuously conducted through the first voltage division module 2011 and the voltage stabilization module 2012, power is supplied to the C1 and the Relay coil, at the moment, the public end 131 of the electric control device is controlled to be attracted with the second end 133 of the electric control device, and the buzzer also continuously alarms.
In the embodiment of the present application, referring to fig. 5 and fig. 6, the third switching circuit 223 is further configured to, when the voltages provided by the ac power grid to the first terminal of the third switching circuit 223 and the second terminal of the third switching circuit 223 are smaller than the second voltage threshold, turn on the third terminal of the third switching circuit 223 and the second terminal of the third switching circuit 223, so that the second switching circuit 18 is turned off to stop supplying power to the overvoltage prompting module.
In one achievable scenario, referring to fig. 4, 5 and 6, when the ac input of the ac power grid returns to below the trigger point of the overvoltage protection, the voltages supplied to the first terminal of the third switching circuit 223 and the second terminal of the third switching circuit 223 by the ac power grid become smaller, and when the voltages supplied to the first terminal of the third switching circuit 223 and the second terminal of the third switching circuit 223 by the ac power grid are smaller than the second voltage threshold, the third terminal of the third switching circuit 223 and the second terminal of the third switching circuit 223 are turned on, and the Q1 base is pulled low and turned off. The buzzer is not powered, so the buzzer does not buzz any more.
In the embodiment of the present application, referring to fig. 7, the first capacitor C1 is configured to gradually discharge through the coil of the electric control device 13, and control the common terminal 131 of the electric control device to attract the second terminal 133 of the electric control device; when the voltage of the first capacitor is smaller than the third voltage threshold, the common terminal 131 of the control electric control device is attracted to the first terminal 132 of the electric control device.
In an implementation scenario, referring to fig. 7, Q1 is turned off, the C1 voltage is gradually discharged through the Relay coil, and the common terminal 131 of the electric control device is attracted to the second terminal 133 of the electric control device; further, when the voltage of the C1 is lower than 1.2V, the Relay is reset, the common terminal 131 of the control electric control device is disconnected from the second terminal 133 of the control electric control device, and is switched to be attracted to the first terminal 132 of the control electric control device. At the moment, the input voltage provided by the alternating current power grid is automatically connected to the PSU, and the PSU can automatically recover to work and normally output. Illustratively, in fig. 1-5 and 7, the third switch circuit 223 is identified by M1. The voltage dividing module in the embodiment of the application can be realized by adopting a voltage dividing resistor.
Therefore, the power supply protection device realizes intelligent protection of the alternating current input overvoltage. When the AC input voltage is normal, the power supply works normally. When an abnormal high voltage of alternating current is input, the detection circuit detects the abnormal high voltage and starts a related protection circuit by adding the alternating current overvoltage detection circuit, and simultaneously triggers the buzzer to alarm to prompt a user that the input alternating current voltage is abnormal, and on the other hand, the alternating current input voltage of the power supply is cut off by using the relay to protect the power supply. When the alternating voltage recovers to the normal range, the power supply automatically recovers to the normal working state through the switching of the relay switch, and the alarm buzzer is turned off, so that the service life of the power supply module is prolonged, and the use safety of the power supply module is improved.
It should be noted that, for the description of the same components and the same contents in this embodiment as those in other embodiments, reference may be made to the description in other embodiments, which are not repeated herein.
In other embodiments of the present application, referring to fig. 8, the power protection device 10 includes a regulation and control circuit 40, which is configured to ensure that the power module is not damaged and maintain the connection between the ac power grid and the power module, that is, ensure that the power supply outputs the voltage to the electrical equipment normally, when the ac input voltage exceeds the voltage threshold range. The regulation and control circuit 40 includes a rectification circuit 401, an overvoltage protection circuit 402, a Power Factor Correction (PFC) circuit 403, and a Pulse Width Modulation (PWM) circuit 404, which are connected in sequence. Here, after the ac input voltage Vac is rectified by the rectifier circuit 401, the voltage Vbd is obtained, and then the voltage Vbd is divided by the voltage dividing resistors R1 and R2 in the overvoltage protection circuit 402 and enters the comparison controller 4021. Further, as shown in fig. 8 and 9, when the Vbd voltage does not exceed 450V, the comparison controller 4021 controls S1 to be on, vbd can be normally applied to the Power Factor Correction (PFC) circuit 403 and the Pulse Width Modulation (PWM) circuit 404, and the power supply operates normally; when the Vbd voltage exceeds 450V, the comparison controller 4021 controls S1 to be turned off, and the Vbd voltage higher than 450V cannot be applied to the Power Factor Correction (PFC) circuit 403, the large capacitor Cbulk, and the Pulse Width Modulation (PWM) circuit 404. But the Power Factor Correction (PFC) circuit 403 and the Pulse Width Modulation (PWM) circuit 404 still work continuously, and the energy storage on the large capacitor Cbulk is enough to ensure the normal output of the power supply.
An embodiment of the present application provides a control method of a power protection device, which is applied to the power protection device 10 provided in the foregoing embodiment, and as shown in fig. 10, the method includes:
According to the control method of the power supply protection device, when the power supply protection device is connected with the power supply module, if the voltage input into the power supply protection device by the alternating current power grid is within the voltage threshold range, the public end of the electric control device of the power supply protection device is controlled to be attracted with the first end of the electric control device, and the power supply module is connected into the alternating current power grid; through the power protection device connected between the alternating current power grid and the power module, under the condition that the voltage input into the power protection device by the alternating current power grid is within the voltage threshold range, the public end of the electric control device is controlled to be attracted with the first end of the electric control device, the power module is connected into the alternating current power grid, overvoltage protection is carried out on the power module, meanwhile, electric equipment at the rear end of the power module is also protected, the service life of the power module is prolonged, and the use safety of the power module is improved.
An embodiment of the present application provides a control method for a power protection device, which is applied to the power protection device 10 provided in the foregoing embodiment, and as shown in fig. 11, the method includes:
And 603, if the charged voltage of the first capacitor is greater than the first voltage threshold, controlling the common end of the electric control device to be attracted with the second end of the electric control device, and disconnecting the alternating current power grid from the power supply module.
And step 604, when the voltage of the first capacitor is smaller than the third voltage threshold, controlling the common end of the electric control device to be attracted with the first end of the electric control device.
The control method of the power supply protection device provided by the embodiment of the application realizes intelligent protection of alternating current input overvoltage. When the AC input voltage is normal, the power supply works normally. When an abnormal high voltage is input, the detection circuit detects the abnormal high voltage by adding the alternating voltage detection circuit, the related protection circuit is started, the buzzer is triggered to alarm, a user is prompted that the input alternating voltage is abnormal, and on the other hand, the alternating input voltage of the power supply is cut off by using the relay so as to protect the power supply. When the alternating voltage recovers to the normal range, the power supply automatically recovers to the normal working state through the switching of the relay switch, and the alarm buzzer is turned off, so that the service life of the power supply module is prolonged, and the use safety of the power supply module is improved.
The above description of the apparatus embodiment is similar to the above description of the method embodiment, with similar beneficial effects as the method embodiment. For technical details not disclosed in the embodiments of the apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
In the embodiment of the present application, if the information processing method is implemented in the form of a software functional module and sold or used as a standalone product, the information processing method may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a terminal device to execute all or part of the methods of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.
Embodiments of the application provide a computer-readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the steps of:
when the power supply protection device is connected with the power supply module, if the voltage input into the power supply protection device by the alternating current power grid is within the voltage threshold range, the public end of the electric control device of the power supply protection device is controlled to be attracted with the first end of the electric control device, and the power supply module is connected into the alternating current power grid.
In other embodiments of the present application, the one or more programs are executable by the one or more processors and further implement the steps of:
when the power supply protection device is connected with the power supply module, if the voltage input into the power supply protection device by the alternating current power grid exceeds the voltage threshold range, the first switch circuit is controlled to be conducted to charge the first capacitor; and if the charged voltage of the first capacitor is greater than the first voltage threshold, controlling the common end of the electric control device to be attracted with the second end of the electric control device, and disconnecting the alternating current power grid from the power supply module.
In other embodiments of the present application, the one or more programs are executable by the one or more processors and further implement the steps of:
and when the voltage of the first capacitor is smaller than the third voltage threshold, controlling the common end of the electric control device to be attracted with the first end of the electric control device.
The computer-readable storage medium provided by the embodiment of the application realizes intelligent protection of the alternating current input overvoltage. When the AC input voltage is normal, the power supply works normally. When an abnormal high voltage of alternating current is input, the detection circuit detects the abnormal high voltage and starts a related protection circuit by adding the alternating current overvoltage detection circuit, and simultaneously triggers the buzzer to alarm to prompt a user that the input alternating current voltage is abnormal, and on the other hand, the alternating current input voltage of the power supply is cut off by using the relay to protect the power supply. When the alternating voltage recovers to the normal range, the power supply automatically recovers to the normal working state through the switching of the relay switch, and the alarm buzzer is turned off, so that the service life of the power supply module is prolonged, and the use safety of the power supply module is improved.
Here, it should be noted that: the above description of the storage medium and device embodiments is similar to the description of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the embodiments of the storage medium and apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
The computer storage medium/Memory may be a Memory such as a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a magnetic Random Access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Read Only Disc (CD-ROM); but may also be various terminals such as mobile phones, computers, tablet devices, personal digital assistants, etc., that include one or any combination of the above-mentioned memories.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment of the present application" or "a previous embodiment" or "some embodiments" or "some implementations" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "an embodiment of the present application" or "the preceding embodiments" or "some implementations" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of a unit is only one logical function division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application or portions thereof that contribute to the related art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods of the embodiments of the present application. And the aforementioned storage medium includes: various media that can store program code, such as removable storage devices, ROMs, magnetic or optical disks, etc.
It should be noted that the drawings in the embodiments of the present application are only for illustrating schematic positions of the respective devices on the terminal device, and do not represent actual positions in the terminal device, actual positions of the respective devices or the respective areas may be changed or shifted according to actual conditions (for example, a structure of the terminal device), and a scale of different parts in the terminal device in the drawings does not represent an actual scale.
The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A power supply protection device, the device comprising: the first alternating current input connection, the second alternating current input connection, the electric control device, the first control circuit, the first output port and the second output port; wherein,
the public end of the electric control device is connected with a live wire of an alternating current power grid, and the first end of the electric control device is connected with the first output port through the first alternating current input wiring;
the first end of the first control circuit is connected with the first alternating current input connection wire, the second end of the first control circuit is connected with the second alternating current input connection wire, and the second end of the first control circuit is grounded;
a first end of a coil of the electric control device is connected with a control end of the first control circuit, and a second end of the coil of the electric control device is connected with the second alternating current input wiring;
the second alternating current input wiring is connected with a zero line of the alternating current power grid and the second output port;
the first control circuit is used for controlling the common end of the electric control device to be attracted with the first end of the electric control device and connecting the power supply module to the alternating current power grid if the voltage input into the power supply protection device by the alternating current power grid is within a voltage threshold range when the power supply protection device is connected with the power supply module;
the first control circuit includes: a first switch circuit and a first capacitor; wherein,
one end of the first switch circuit is connected with the first alternating current input wiring, the other end of the first switch circuit is connected with one end of the first capacitor, and the other end of the first capacitor is connected with the second end of the coil of the electric control device;
the first control circuit is further configured to control the first switch circuit to be turned on to charge the first capacitor if the voltage input to the power protection device by the alternating-current power grid exceeds the voltage threshold range when the power protection device is connected to the power module; if the charged voltage of the first capacitor is larger than a first voltage threshold, controlling the common end of the electric control device to be attracted with the second end of the electric control device, and disconnecting the alternating current power grid from the power module; the first capacitor is used for controlling the common end of the electric control device to be attracted with the second end of the electric control device through gradual discharging of a coil of the electric control device.
2. The apparatus of claim 1, the apparatus further comprising: the second alternating current input connection, the second switch circuit, the overvoltage prompt module and the second control circuit are connected in series; wherein,
the second end of the electric control device is sequentially connected with the second switch circuit and the overvoltage prompting module through the third alternating current input connection wire;
one end of the second control circuit is connected with the third alternating current input connection wire, the other end of the second control circuit is connected with the second switch circuit, and the other end of the second control circuit is grounded;
the second control circuit is further used for controlling the second switch circuit to be conducted to supply power to the overvoltage prompting module, so that the overvoltage prompting module outputs overvoltage prompting information.
3. The apparatus of claim 2, the second control circuit comprising: a first branch and a second branch; wherein,
the first branch comprises a first voltage division module and a voltage stabilization module; one end of the first voltage division module is connected with the third alternating current input connection wire, the other end of the first voltage division module is respectively connected with the second branch circuit and one end of the voltage stabilizing module, and the other end of the voltage stabilizing module is respectively connected with the second alternating current input connection wire and the ground;
the second branch circuit comprises a control module, a first end of the control module is connected with the third alternating current input wiring, a second end of the control module is respectively connected with the second alternating current input wiring and the ground, and a control end of the control module is connected with the second switch circuit through a connecting point between the first voltage dividing module and the voltage stabilizing module;
the control module is used for controlling the input voltage of the alternating current power grid to pass through the first voltage division module and the voltage stabilization module so that the second switch circuit is continuously conducted to supply power to the overvoltage prompting module.
4. The apparatus of claim 3, the control module comprising: the second voltage division module, the third switch circuit and the second capacitor; wherein,
the second voltage divider module and the third voltage divider module are connected in series between the third AC input connection and the second AC input connection;
the first end of the third switch circuit and the second end of the third switch circuit are connected to the third voltage division module in parallel, and the third end of the third switch circuit and the second end of the third switch circuit are connected to the voltage stabilization module in parallel;
one end of the second capacitor is connected to a connection point between the second voltage division module and the third voltage division module, and the other end of the second capacitor is connected with the second alternating current input wiring;
the third switching circuit is used for disconnecting the third end of the third switching circuit and the second end of the third switching circuit when the voltage provided by the alternating current power grid to the first end of the third switching circuit and the second end of the third switching circuit is larger than a second voltage threshold value, so that the input voltage of the alternating current power grid passes through the first voltage dividing module and the voltage stabilizing module.
5. The apparatus of claim 4, the third switch circuit further configured to turn on the third terminal of the third switch circuit and the second terminal of the third switch circuit when the voltage provided by the AC power grid to the first terminal of the third switch circuit and the second terminal of the third switch circuit is less than the second voltage threshold, so that the second switch circuit is turned off to stop supplying power to the over-voltage indication module.
6. The apparatus of claim 1, wherein the common terminal of the electrically controlled device is controlled to pull in with the first terminal of the electrically controlled device when the voltage of the first capacitance is less than a third voltage threshold.
7. A control method of a power supply protection device, the method being applied to the device of any one of claims 1 to 6, the method comprising:
when the power supply protection device is connected with a power supply module, if the voltage input into the power supply protection device by an alternating current power grid is within a voltage threshold range, controlling the common end of an electric control device of the power supply protection device to be attracted with the first end of the electric control device, and connecting the power supply module into the alternating current power grid;
when the power supply protection device is connected with the power supply module, if the voltage input into the power supply protection device by the alternating current power grid exceeds the voltage threshold range, controlling a first switch circuit to be conducted to charge the first capacitor; if the charged voltage of the first capacitor is larger than a first voltage threshold, controlling the common end of the electric control device to be attracted with the second end of the electric control device, and disconnecting the alternating current power grid from the power module; the first capacitor is used for controlling the common end of the electric control device to be attracted with the second end of the electric control device through gradual discharging of a coil of the electric control device.
8. The method of claim 7, further comprising:
and when the voltage of the first capacitor is smaller than a third voltage threshold, controlling the common end of the electric control device to be attracted with the first end of the electric control device.
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| CN212343313U (en) * | 2020-06-30 | 2021-01-12 | 深圳市航嘉聚源科技股份有限公司 | Overvoltage protection circuit of switching power supply and switching power supply |
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| JP2002051453A (en) * | 2000-08-03 | 2002-02-15 | Sony Corp | Power supply control device and power supply control method for electronic apparatus |
| CN202309020U (en) * | 2011-10-27 | 2012-07-04 | 深圳茂硕电子科技有限公司 | Intelligently-controlled input overvoltage protection circuit and switch power source adopting same |
| CN103795051B (en) * | 2012-11-01 | 2017-12-15 | 海洋王（东莞）照明科技有限公司 | A kind of overvoltage crowbar and light fixture |
| CN103855680B (en) * | 2014-03-28 | 2019-05-07 | 广州松下空调器有限公司 | A kind of AC over-voltage protector part |
| WO2017062715A1 (en) * | 2015-10-08 | 2017-04-13 | Hubbell Incorporated | Surge protective device with abnormal overvoltage protection |
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| CN212343313U (en) * | 2020-06-30 | 2021-01-12 | 深圳市航嘉聚源科技股份有限公司 | Overvoltage protection circuit of switching power supply and switching power supply |
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