CN114142572A - Power supply control circuit based on MOS switch circuit component - Google Patents
Power supply control circuit based on MOS switch circuit component Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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Abstract
The invention provides a power supply control circuit based on a MOS switch circuit component. Including the digital switch and with external supply circuit and the battery supply circuit that the digital switch connects still include: main MOS switch tube: the main MOS switching tube is electrically connected with the digital switcher and is used for controlling the on-off of the external power supply circuit; auxiliary MOS switch tube: the auxiliary MOS switch tube is electrically connected with the digital switcher and is used for controlling the on-off of the storage battery power supply circuit when the external power supply circuit is in short circuit; forced MOS switch tube: the forced MOS switch tube is electrically connected with the digital switcher and controls the external power supply circuit/storage battery power supply circuit to be forcibly switched on and off; a power supply controller: and the power supply controller is used for being electrically connected with the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube and controlling the conduction and the cut-off of the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube.
Description
Technical Field
The invention relates to the technical field of power supply control, in particular to a power supply control circuit based on an MOS switch circuit component.
Background
At present, with the development of new energy technology, new energy technology is introduced into various industries, and a large number of charging devices appear, but the existing charging devices have a great problem in power supply control, and firstly, the stability of a power supply is a technical problem which is difficult to solve; secondly, most of the switching of the power supply is controlled manually, rather than automatically according to the real-time condition of the load.
Therefore, those skilled in the art have made efforts to develop a power control circuit having high stability and an automatic power switching function.
Disclosure of Invention
The invention provides a power supply control circuit based on an MOS (metal oxide semiconductor) switch circuit component, which is used for solving the technical problem that the stability of a power supply is always very difficult to solve in the prior art; secondly, most of the switching of the power supply is controlled manually, rather than automatically according to the real-time condition of the load.
A power supply control circuit based on MOS switch circuit component, includes digital switch and external power supply circuit and the battery supply circuit who is connected with the digital switch, includes:
main MOS switch tube: the main MOS switching tube is electrically connected with the digital switcher and is used for controlling the on-off of the external power supply circuit;
auxiliary MOS switch tube: the auxiliary MOS switch tube is electrically connected with the digital switcher and is used for controlling the on-off of the storage battery power supply circuit when the external power supply circuit is in short circuit;
forced MOS switch tube: the forced MOS switch tube is electrically connected with the digital switcher and controls the external power supply circuit/storage battery power supply circuit to be forcibly switched on and off;
a power supply controller: and the power supply controller is used for being electrically connected with the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube and controlling the conduction and the cut-off of the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube.
As an embodiment of the present invention: the circuit further comprises:
when the main MOS switch tube is in a conducting state, the auxiliary MOS switch tube and the forced MOS switch tube are in a cut-off state;
when the auxiliary MOS switch tube is in a conducting state, the main MOS switch tube and the forced MOS switch tube are in a cut-off state;
and when the forced MOS switch tube is in a conducting state, the auxiliary MOS switch tube and the main MOS switch tube are in a cut-off state.
As an embodiment of the present invention: the circuit further comprises:
an inverter: the output end of the phase inverter is respectively connected with the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube to receive the level signal of the phase inverter;
drive current regulator: the drive current regulator is connected in parallel with the inverter and receives a current signal of a current source.
As an embodiment of the present invention: the circuit further comprises:
an FPGA circuit: the FPGA circuit is electrically connected with the current source and controls the real-time current output by the current source;
the test circuit comprises: the test circuit is electrically connected with the FPGA circuit and used for detecting the real-time current and determining the real-time current state;
a voltage control circuit: the driving circuit is electrically connected with the FPGA circuit and the testing circuit and is used for controlling the output voltage of the external power supply circuit and the storage battery power supply circuit according to the real-time current state; wherein,
the voltage control circuit consists of a voltage regulator and an equivalent circuit;
a time sequence output circuit: the time sequence output circuit is used for receiving an external input signal and controlling the digital switcher to generate a digital switching signal.
As an embodiment of the present invention: the test circuit includes:
a detector: the detector is electrically connected with the output ends of the external power supply circuit and the storage battery power supply circuit to determine real-time current;
a converter: the converter is connected with the detector in series and converts the real-time current into a sawtooth wave;
an error amplifier: the error amplifier is electrically connected with the output end of the converter and amplifies the sawtooth wave;
a sawtooth wave comparator: and a first output end of the sawtooth wave comparator is electrically connected with the error amplifier, and a second input end of the sawtooth wave comparator is electrically connected with a sawtooth wave reference signal end on the FPGA circuit.
As an embodiment of the present invention: the circuit further comprises:
input rectification filter circuit: the input rectifying and filtering circuit is electrically connected with the input end of the storage battery power supply circuit;
current sampling resistance: the first current sampling resistor is electrically connected with the output ends of the external power supply circuit and the storage battery power supply circuit; wherein,
the current sampling resistor comprises a first output end, a second output end and a third output end;
the first output end is used for outputting a first sampling current when the main MOS switching tube is conducted;
the second output end is used for outputting a second sampling current when the auxiliary MOS switch tube is conducted;
and the third output end is used for being connected with the first output end or the second output end in parallel according to a conducted power supply when the forced MOS switching tube is conducted.
As an embodiment of the present invention: the circuit further comprises:
a multi-channel controller: the multichannel controller is electrically connected with the FPGA circuit and is electrically connected with load equipment connected with the output end of the external power supply circuit/storage battery power supply circuit;
a digital-to-analog converter: the digital-to-analog converter is electrically connected with the multi-channel controller and generates a digital signal;
output and input buffer: the output and input buffer is electrically connected with the digital-to-analog converter and stores the digital signal.
As an embodiment of the present invention: the circuit further comprises:
switching value input device: the switching value input device is used for receiving an input instruction of a user and generating a switching value signal;
the DSP recognizer: the DSP recognizer is used for being electrically connected with the switching value input device and generating a power supply control signal;
a communicator: the communicator is electrically connected with the DSP recognizer and receives a real-time regulation and control instruction;
a leakage detector: the leakage detector is electrically connected with the external power supply circuit and the storage battery power supply circuit and judges whether the external power supply circuit and the storage battery power supply circuit generate leakage;
a phase-missing detector: and the open-phase detector is electrically connected with the external power supply and judges whether the external power supply is open-phase or not.
As an embodiment of the present invention: the power supply controller is also connected with a main controller, and the main controller is used for carrying out circuit detection and power supply control; wherein,
the circuit detection comprises: leakage detection, open-phase detection, overcurrent detection, overvoltage detection and undervoltage detection;
the power supply control includes: external power supply, storage battery power supply and switching power supply.
As an embodiment of the present invention: the main controller for circuit detection and power supply control comprises the following steps:
the power supply control includes:
step 1: judging whether the external power supply circuit is connected or not according to a power supply starting signal input by a user, controlling the conduction of the main MOS switch tube when the external power supply is connected, sending a power supply instruction to the external power supply, and supplying power to load equipment by the external power supply circuit; when the external power supply is not switched on, the auxiliary MOS switching tube is controlled to be switched on, a power supply instruction is sent to the storage battery power supply circuit, and the storage battery circuit supplies power to load equipment;
step 2: detecting the circuit states of the external power supply circuit and the storage battery power supply circuit, controlling the forced MOS switching tube when the external power supply circuit is powered off, sending a power supply instruction to the storage battery power supply circuit, and supplying power to load equipment by the storage battery circuit; when the storage battery circuit is powered off, the forced MOS switching tube is controlled, a power supply instruction is sent to the external power supply circuit, and the external power supply circuit supplies power to load equipment;
the circuit detection comprises:
step 1: data acquisition, namely acquiring real-time current and real-time voltage;
step 2: carrying out digital filtering on the real-time current, calculating a power factor, and carrying out electric leakage detection and open-phase detection according to the power factor;
and step 3: acquiring a first detection result, and judging whether to switch the power supply or not according to the first detection result;
and 4, step 4: performing overvoltage detection and undervoltage detection according to the first detection result, and judging whether to perform power supply switching;
and 5: and generating circuit data according to the power supply switching result.
The invention has the beneficial effects that: the invention can firstly control the power supply circuit, realize the power supply of an external power supply, namely, the power supply of alternating current such as commercial power supply, automatic power generation and power supply, and the like, also can realize the direct current power supply based on the storage battery, and certainly, the storage battery can also be externally connected with solar equipment to store clean energy. The invention has three power supply modes and can be suitable for various power supply scenes.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic circuit diagram of a power control circuit based on MOS switch circuit components according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a reverse control circuit in an embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1:
as shown in fig. 1, the present invention is a power control circuit based on MOS switch circuit components, including a digital switch, and an external power supply circuit and a storage battery power supply circuit connected to the digital switch, including:
main MOS switch tube: the main MOS switching tube is electrically connected with the digital switcher and is used for controlling the on-off of the external power supply circuit;
the digital switcher has great function of controlling the on-off of different MOS switching tubes and naturally controlling the on-off of an external power supply circuit. The invention is not a power supply circuit of a pure electronic component, and the invention carries out digital control and direct control on equipment comprising external control.
Auxiliary MOS switch tube: the auxiliary MOS switch tube is electrically connected with the digital switcher and is used for controlling the on-off of the storage battery power supply circuit when the external power supply circuit is in short circuit;
forced MOS switch tube: the forced MOS switch tube is electrically connected with the digital switcher and controls the external power supply circuit/storage battery power supply circuit to be forcibly switched on and off;
a power supply controller: and the power supply controller is used for being electrically connected with the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube and controlling the conduction and the cut-off of the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube.
The principle of the technical scheme is as follows: the technical scheme of the invention is that the external power supply circuit and the storage battery circuit are controlled by three MOS tubes in a mode of switching on and off the MOS tubes. When the external power supply circuit and the storage battery circuit are controlled, the external power supply is directly used for supplying power under the condition of switching on the external power supply, at the moment, the main MOS switch tube is firstly conducted, the main MOS switch tube receives a conducting signal of the digital switcher, and when the external power supply is not switched on, the storage battery is used for supplying power only when the storage battery power supply is switched on, the auxiliary MOS switch tube receives the conducting signal of the digital switcher at the moment, and finally the control of the whole power supply is realized.
The beneficial effects of the above technical scheme are that: the invention can firstly control the power supply circuit, realize the power supply of an external power supply, namely, the power supply of alternating current such as commercial power supply, automatic power generation and power supply, and the like, also can realize the direct current power supply based on the storage battery, and certainly, the storage battery can also be externally connected with solar equipment to store clean energy. The invention has three power supply modes and can be suitable for various power supply scenes.
Because the invention has storage battery power supply and external power supply, so when the storage battery supplies power, if it is not the compulsory power supply state, the auxiliary MOS switch tube can judge whether to turn off according to the loss on the N channel, and then it is converted into external power supply, at this stage, there is a certain delay time, the effect of this delay time is to protect the load, in this process:
the voltage of the storage battery is reduced, and the current of the auxiliary MOS switching tube N channel is continuously reduced; after a period of time, the voltage of the N channel of the auxiliary MOS switch tube is reduced to 0, and at the moment, the auxiliary MOS switch tube is completely switched off.
This process can be represented by the following formula:
when the output voltage of the storage battery drops, the driving voltage of the auxiliary MOS switching tube can be represented by the following formula:
namely: the driving voltage of the auxiliary MOS switching tube of the invention conforms to the following formula:
in the above formula, UN(t) represents the auxiliary MOS switch tube driving voltage at time tiThe voltage value at the moment, which is a variable value; u shapeIs low inThe low level voltage value sent by the digital switcher is represented; u shapeHeight ofThe low level voltage value sent by the digital switcher is represented; the meaning of the formula table is to calculate the voltage value of the N channel of the auxiliary MOS switch tube, because the voltage of high level is continuously reduced in the process of voltage reduction, U is continuously reducedIs low inRising until the high level becomes 0 and the low level reaches the maximum value of the low level; typically 0.4V; t is tiThe time represented, i, is only a serial number, represents the current time, and also represents the end time; t is t0The initial time of presentation; t is ti-t0The time value, i.e. the time of descent, is indicated; the reason why the high level voltage is applied in the above formula is that the driving voltage is higher than the high voltage regardless of the level, but the driving voltage is 0 when the high level voltage is reduced to a certain level, and the driving voltage is negative when the high level voltage is 0. It is of course not possible that the drive voltage is negative and there must be a moment when the drive voltage is equal to 0. The driving voltage is 0, which means that the voltage of the auxiliary MOS switch tube N channel is 0, i.e. the auxiliary MOS switch tube is turned off.
When the auxiliary MOS switch tube is turned off, the digital switcher sends out a signal to automatically control the conduction of the main MOS switch tube:
the main MOS switch tube and the auxiliary MOS switch tube conform to the following formula:
that is, only one of the main MOS switch tube and the auxiliary MOS switch tube is in the on state.
And the forced MOS switch tube is used for receiving an external instruction, and the priority is higher than that of the main MOS switch tube and the auxiliary MOS switch tube.
Example 2:
as an embodiment of the present invention: the circuit further comprises:
when the main MOS switch tube is in a conducting state, the auxiliary MOS switch tube and the forced MOS switch tube are in a cut-off state;
when the auxiliary MOS switch tube is in a conducting state, the main MOS switch tube and the forced MOS switch tube are in a cut-off state;
and when the forced MOS switch tube is in a conducting state, the auxiliary MOS switch tube and the main MOS switch tube are in a cut-off state.
The principle of the technical scheme is as follows: only one of the three MOS switching tubes is in a conducting state at the same time, and the MOS switching tube in the conducting state executes a power supply task. When any one of the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube is controlled, if one switch tube is in a conducting state, the other switch tubes are in a stopping state.
The beneficial effects of the above technical scheme are that: the invention can realize the accurate control of a single switch tube and ensure that a power circuit can carry out stable power supply.
Example 3:
as an embodiment of the present invention: as shown in fig. 2, the circuit further includes:
an inverter: the output end of the phase inverter is respectively connected with the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube to receive the level signal of the phase inverter; the phase inverter receives information sent by a user, the phase inverter is electrically connected with external control equipment, and the external control equipment is master control equipment, such as: the regulation and control cabinet of electric power computer lab.
Drive current regulator: the drive current regulator is connected in parallel with the inverter and receives a current signal of a current source.
The principle of the technical scheme is as follows: the invention is also provided with an inverter, the purpose of the inverter is to invert phase signals so as to realize the logic control of the circuit, the driving current regulator is connected with the inverter in parallel, and when the current signal of the current source is received, the current regulating signal is sent to the inverter.
The beneficial effects of the above technical scheme are that: the invention controls the current through the phase inverter and the drive current regulator and controls the stability of the current on the circuit.
Example 4:
as an embodiment of the present invention: the circuit further comprises:
an FPGA circuit: the FPGA circuit is electrically connected with the current source and controls the real-time current output by the current source; the FPGA circuit is a programmable circuit based on the prior art, the FPGA circuit is connected with the inverter, and the FPGA circuit can send a control signal to the inverter. The FPGA circuit is a circuit with flexible and various configurations, and is connected with different electronic components according to an FPGA chip to execute different functions.
The test circuit comprises: the test circuit is electrically connected with the FPGA circuit and used for detecting the real-time current and determining the real-time current state; the test circuit is a circuit that measures a state of a circuit at a moment, and determines a value of a method of evaluation according to a state change of current and voltage.
A voltage control circuit: the driving circuit is electrically connected with the FPGA circuit and the testing circuit and is used for controlling the output voltage of the external power supply circuit and the storage battery power supply circuit according to the real-time current state; wherein,
the voltage control circuit consists of a voltage regulator and an equivalent circuit;
a time sequence output circuit: the time sequence output circuit is used for receiving an external input signal and controlling the digital switcher to generate a digital switching signal.
The principle of the technical scheme is as follows: the invention is also provided with an FPGA circuit which is a control circuit and is used for controlling the real-time current output by the power supply circuit, and when the output current is controlled, the FPGA circuit receives the control on the circuit stability in the load circuit. The test current is an auxiliary circuit of the FPGA circuit and is used for detecting the current of the current source, the voltage control circuit is used for adjusting the voltage according to the state of the current output by the current source, and in the voltage adjusting process, the equivalent circuit aims to adjust the voltage in an equivalent comparison mode in the voltage adjusting process.
The beneficial effects of the above technical scheme are that: the invention can not only detect the current of the current source and determine the real-time current state, but also realize the regulation control of the voltage according to the current state.
Example 5:
as an embodiment of the present invention: the test circuit includes:
a detector: the detector is electrically connected with the output ends of the external power supply circuit and the storage battery power supply circuit to determine real-time current;
a converter: the converter is connected with the detector in series and converts the real-time current into a sawtooth wave; the sawtooth wave has the function of highlighting the current and elegant abnormal data, the characteristic of the sawtooth wave is that an abnormal signal is met,
an error amplifier: the error amplifier is electrically connected with the output end of the converter and amplifies the sawtooth wave;
a sawtooth wave comparator: and a first output end of the sawtooth wave comparator is electrically connected with the error amplifier, and a second input end of the sawtooth wave comparator is electrically connected with a sawtooth wave reference signal end on the FPGA circuit.
The principle of the technical scheme is as follows: when the test circuit detects current, firstly, real-time current is detected and determined based on a detector, after the real-time current is determined, waveform conversion is carried out through a converter and the detector, the waveform of the real-time current is converted into sawtooth waves, the purpose of the conversion is to realize accurate judgment of current stability, and after the current sawtooth waves are amplified, the test circuit can compare the sawtooth waves of the real-time current with the sawtooth waves of reference signals, and determines amplified current errors, so that the current state is determined.
The beneficial effects of the above technical scheme are that: the invention can amplify the current, convert the waveform of the current into the sawtooth wave, and realize the accurate calculation of the current error in the form of the sawtooth wave amplification.
Example 6:
as an embodiment of the present invention: the circuit further comprises:
input rectification filter circuit: the input rectifying and filtering circuit is electrically connected with the input end of the storage battery power supply circuit; the rectifier circuit and the filter circuit have different functions. The rectifier circuit has the function of converting sine wave alternating current voltage into unidirectional pulsating voltage, and the filter circuit has the function of converting the unidirectional pulsating voltage into direct current voltage. Therefore, the output of the rectifying and filtering circuit is the direct-current voltage.
Current sampling resistance: the first current sampling resistor is electrically connected with the output ends of the external power supply circuit and the storage battery power supply circuit; wherein,
the current sampling resistor comprises a first output end, a second output end and a third output end;
the first output end is used for outputting a first sampling current when the main MOS switching tube is conducted;
the second output end is used for outputting a second sampling current when the auxiliary MOS switch tube is conducted;
and the third output end is used for being connected with the first output end or the second output end in parallel according to a conducted power supply when the forced MOS switching tube is conducted.
The principle of the technical scheme is as follows: when the external power supply is controlled, the power states of the external power supply circuit and the storage battery circuit are necessarily judged, and in the judgment process of the power states, circuit signals are collected in a sampling mode, and then the collected circuit signals are judged to determine the current state.
The beneficial effects of the above technical scheme are that: the invention can realize the control of the sampling signal of the current, the judgment of the current state and the control of the external power circuit and the storage battery circuit.
Example 7:
as an embodiment of the present invention: the circuit further comprises:
a multi-channel controller: the multichannel controller is electrically connected with the FPGA circuit and is electrically connected with load equipment connected with the output end of the external power supply circuit/storage battery power supply circuit;
a digital-to-analog converter: the digital-to-analog converter is electrically connected with the multi-channel controller and generates a digital signal;
output and input buffer: the output and input buffer is electrically connected with the digital-to-analog converter and stores the digital signal.
The principle of the technical scheme is as follows: the invention has multi-channel control, the multi-channel controller is used for controlling the load device, the purpose of digital-to-analog conversion is to convert the digital signal electric signal of the load device into a digital signal, and the output buffer stores all the digital signals in the current regulation process.
The beneficial effects of the above technical scheme are that: the invention can realize the stable adjustment of the circuit, receives the signal of the load equipment through multi-channel control, and then controls the load equipment based on the output of the circuit.
Example 8:
as an embodiment of the present invention: the circuit further comprises:
switching value input device: the switching value input device is used for receiving an input instruction of a user and generating a switching value signal;
the DSP recognizer: the DSP recognizer is used for being electrically connected with the switching value input device and generating a power supply control signal;
a communicator: the communicator is electrically connected with the DSP recognizer and receives a real-time regulation and control instruction;
a leakage detector: the leakage detector is electrically connected with the external power supply circuit and the storage battery power supply circuit and judges whether the external power supply circuit and the storage battery power supply circuit generate leakage;
a phase-missing detector: and the open-phase detector is electrically connected with the external power supply and judges whether the external power supply is open-phase or not.
The principle of the technical scheme is as follows: the invention can detect the circuit in addition to the control of the circuit, and in the invention, the circuit detection is continued in a mode of detecting the leakage and the phase loss based on the switching value, thereby judging whether the circuit has faults or not.
The beneficial effects of the above technical scheme are that: the invention can realize real-time detection of the circuit and judge whether the circuit generates electric leakage and phase loss.
Example 9:
as an embodiment of the present invention: the power supply controller is also connected with a main controller, and the main controller is used for carrying out circuit detection and power supply control; wherein,
the circuit detection comprises: leakage detection, open-phase detection, overcurrent detection, overvoltage detection and undervoltage detection;
the power supply control includes: external power supply, storage battery power supply and switching power supply.
The principle of the technical scheme is as follows: the invention also has the advantages that the circuit power supply is carried out by three modes of external power supply, storage battery power supply and switching power supply in the power supply process.
The beneficial effects of the above technical scheme are that: the invention can realize real-time detection of the circuit, and can also realize high-efficiency air control and circuit switching in the power supply process.
Example 10:
as an embodiment of the present invention: the main controller for circuit detection and power supply control comprises the following steps:
the power supply control includes:
step 1: judging whether the external power supply circuit is connected or not according to a power supply starting signal input by a user, controlling the conduction of the main MOS switch tube when the external power supply is connected, sending a power supply instruction to the external power supply, and supplying power to load equipment by the external power supply circuit; when the external power supply is not switched on, the auxiliary MOS switching tube is controlled to be switched on, a power supply instruction is sent to the storage battery power supply circuit, and the storage battery circuit supplies power to load equipment;
step 2: detecting the circuit states of the external power supply circuit and the storage battery power supply circuit, controlling the forced MOS switching tube when the external power supply circuit is powered off, sending a power supply instruction to the storage battery power supply circuit, and supplying power to load equipment by the storage battery circuit; when the storage battery circuit is powered off, the forced MOS switching tube is controlled, a power supply instruction is sent to the external power supply circuit, and the external power supply circuit supplies power to load equipment;
the circuit detection comprises:
step 1: data acquisition, namely acquiring real-time current and real-time voltage;
step 2: carrying out digital filtering on the real-time current, calculating a power factor, and carrying out electric leakage detection and open-phase detection according to the power factor;
and step 3: acquiring a first detection result, and judging whether to switch the power supply or not according to the first detection result;
and 4, step 4: performing overvoltage detection and undervoltage detection according to the first detection result, and judging whether to perform power supply switching;
and 5: and generating circuit data according to the power supply switching result.
The principle of the technical scheme is as follows: in the process of circuit control, the invention mainly supplies power in two modes of external circuit power supply and storage battery power supply, thereby ensuring that the circuit realizes high-efficiency circuit switching. In the aspect of circuit detection, the invention judges whether the phase is lost and the electric leakage is caused by the power factor through calculation of the power factor of digital filtering based on real-time current and real-time voltage. When the phase failure and the electric leakage occur, the other circuit is switched to supply power, overvoltage and undervoltage detection is judged and carried out based on the detection result of the first circuit detection, and the power supply switching can be carried out only under the condition that the overvoltage and the undervoltage are not carried out.
The beneficial effects of the above technical scheme are that: the invention can not only actively switch and automatically switch the circuit in the aspects of circuit power supply control and circuit detection, but also detect the open-phase leakage, undervoltage and overvoltage of the circuit.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A power supply control circuit based on MOS switch circuit component, includes digital switch and with external supply circuit and the battery supply circuit that the digital switch is connected, its characterized in that includes:
main MOS switch tube: the main MOS switching tube is electrically connected with the digital switcher and is used for controlling the on-off of the external power supply circuit;
auxiliary MOS switch tube: the auxiliary MOS switch tube is electrically connected with the digital switcher and is used for controlling the on-off of the storage battery power supply circuit when the external power supply circuit is in short circuit;
forced MOS switch tube: the forced MOS switch tube is electrically connected with the digital switcher and controls the external power supply circuit/storage battery power supply circuit to be forcibly switched on and off;
a power supply controller: and the power supply controller is used for being electrically connected with the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube and controlling the conduction and the cut-off of the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube.
2. A MOS switch circuit arrangement based power control circuit according to claim 1, wherein the circuit further comprises:
when the main MOS switch tube is in a conducting state, the auxiliary MOS switch tube and the forced MOS switch tube are in a cut-off state;
when the auxiliary MOS switch tube is in a conducting state, the main MOS switch tube and the forced MOS switch tube are in a cut-off state;
and when the forced MOS switch tube is in a conducting state, the auxiliary MOS switch tube and the main MOS switch tube are in a cut-off state.
3. A MOS switch circuit arrangement based power control circuit according to claim 1, wherein the circuit further comprises:
an inverter: the output end of the phase inverter is respectively connected with the main MOS switch tube, the auxiliary MOS switch tube and the forced MOS switch tube to receive the level signal of the phase inverter;
drive current regulator: the drive current regulator is connected in parallel with the inverter and receives a current signal of a current source.
4. A MOS switch circuit arrangement based power control circuit according to claim 3, wherein the circuit further comprises:
an FPGA circuit: the FPGA circuit is electrically connected with the current source and controls the real-time current output by the current source;
the test circuit comprises: the test circuit is electrically connected with the FPGA circuit and used for detecting the real-time current and determining the real-time current state;
a voltage control circuit: the driving circuit is electrically connected with the FPGA circuit and the testing circuit and is used for controlling the output voltage of the external power supply circuit and the storage battery power supply circuit according to the real-time current state; wherein,
the voltage control circuit consists of a voltage regulator and an equivalent circuit;
a time sequence output circuit: the time sequence output circuit is used for receiving an external input signal and controlling the digital switcher to generate a digital switching signal.
5. A MOS-switch-circuit-component-based power control circuit as claimed in claim 4, wherein the test circuit comprises:
a detector: the detector is electrically connected with the output ends of the external power supply circuit and the storage battery power supply circuit to determine real-time current;
a converter: the converter is connected with the detector in series and converts the real-time current into a sawtooth wave;
an error amplifier: the error amplifier is electrically connected with the output end of the converter and amplifies the sawtooth wave;
a sawtooth wave comparator: and a first output end of the sawtooth wave comparator is electrically connected with the error amplifier, and a second input end of the sawtooth wave comparator is electrically connected with a sawtooth wave reference signal end on the FPGA circuit.
6. A MOS switch circuit arrangement based power control circuit according to claim 1, wherein the circuit further comprises:
input rectification filter circuit: the input rectifying and filtering circuit is electrically connected with the input end of the storage battery power supply circuit;
current sampling resistance: the first current sampling resistor is electrically connected with the output ends of the external power supply circuit and the storage battery power supply circuit; wherein,
the current sampling resistor comprises a first output end, a second output end and a third output end;
the first output end is used for outputting a first sampling current when the main MOS switching tube is conducted;
the second output end is used for outputting a second sampling current when the auxiliary MOS switch tube is conducted;
and the third output end is used for being connected with the first output end or the second output end in parallel according to a conducted power supply when the forced MOS switching tube is conducted.
7. A MOS-switch-circuit-component-based power control circuit as claimed in claim 4, wherein the circuit further comprises:
a multi-channel controller: the multichannel controller is electrically connected with the FPGA circuit and is electrically connected with load equipment connected with the output end of the external power supply circuit/storage battery power supply circuit;
a digital-to-analog converter: the digital-to-analog converter is electrically connected with the multi-channel controller and generates a digital signal;
output and input buffer: the output and input buffer is electrically connected with the digital-to-analog converter and stores the digital signal.
8. A MOS switch circuit arrangement based power control circuit according to claim 1, wherein the circuit further comprises:
switching value input device: the switching value input device is used for receiving an input instruction of a user and generating a switching value signal;
the DSP recognizer: the DSP recognizer is used for being electrically connected with the switching value input device and generating a power supply control signal;
a communicator: the communicator is electrically connected with the DSP recognizer and receives a real-time regulation and control instruction;
a leakage detector: the leakage detector is electrically connected with the external power supply circuit and the storage battery power supply circuit and judges whether the external power supply circuit and the storage battery power supply circuit generate leakage;
a phase-missing detector: and the open-phase detector is electrically connected with the external power supply and judges whether the external power supply is open-phase or not.
9. The power control circuit based on the MOS switch circuit component as claimed in claim 1, wherein the power controller is further connected with a main controller, and the main controller is used for circuit detection and power supply control; wherein,
the circuit detection comprises: leakage detection, open-phase detection, overcurrent detection, overvoltage detection and undervoltage detection;
the power supply control includes: external power supply, storage battery power supply and switching power supply.
10. A MOS switch circuit block based power control circuit as claimed in claim 9, wherein said main controller performing circuit detection and power supply control comprises the steps of:
the power supply control includes:
step 1: judging whether the external power supply circuit is connected or not according to a power supply starting signal input by a user, controlling the conduction of the main MOS switch tube when the external power supply is connected, sending a power supply instruction to the external power supply, and supplying power to load equipment by the external power supply circuit; when the external power supply is not switched on, the auxiliary MOS switching tube is controlled to be switched on, a power supply instruction is sent to the storage battery power supply circuit, and the storage battery circuit supplies power to load equipment;
step 2: detecting the circuit states of the external power supply circuit and the storage battery power supply circuit, controlling the forced MOS switching tube when the external power supply circuit is powered off, sending a power supply instruction to the storage battery power supply circuit, and supplying power to load equipment by the storage battery circuit; when the storage battery circuit is powered off, the forced MOS switching tube is controlled, a power supply instruction is sent to the external power supply circuit, and the external power supply circuit supplies power to load equipment;
the circuit detection comprises:
step 1: data acquisition, namely acquiring real-time current and real-time voltage;
step 2: carrying out digital filtering on the real-time current, calculating a power factor, and carrying out electric leakage detection and open-phase detection according to the power factor;
and step 3: acquiring a first detection result, and judging whether to switch the power supply or not according to the first detection result;
and 4, step 4: performing overvoltage detection and undervoltage detection according to the first detection result, and judging whether to perform power supply switching;
and 5: and generating circuit data according to the power supply switching result.
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| CN202111530714.XA CN114142572A (en) | 2021-12-14 | 2021-12-14 | Power supply control circuit based on MOS switch circuit component |
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