CN111969894A - Hard start, soft start, frequency conversion start integration switching module - Google Patents
Hard start, soft start, frequency conversion start integration switching module Download PDFInfo
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- CN111969894A CN111969894A CN202010993179.0A CN202010993179A CN111969894A CN 111969894 A CN111969894 A CN 111969894A CN 202010993179 A CN202010993179 A CN 202010993179A CN 111969894 A CN111969894 A CN 111969894A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/28—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive increase of voltage applied to primary circuit of motor
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Abstract
The invention discloses a hard start, soft start and variable frequency start integration switching module, which belongs to the technical field of circuit control modules and solves the problems of different regulation requirements and complicated connection of equipment start; the power conversion module comprises a ship-shaped switch, an AC/DC module, a fuse and a signal output which are sequentially connected in series, one end of a coil of the relay module is connected to a signal wiring port, the other end of the coil is grounded, and a plurality of switch contacts are respectively connected to the signal wiring port, so that the effects of meeting different signal connection controls and realizing multifunctional switching are achieved.
Description
Technical Field
The invention relates to the field of hardware circuits, in particular to a hard start, soft start and variable frequency start integrated switching module.
Background
Generally, for the drive control of a motor, the working environment needs to be considered to determine the starting mode of the equipment when the power supply connection of a power grid to the equipment is connected, and some equipment motor drives need hard starting, some need soft starting, and some need variable frequency starting. Therefore, independent control is needed, and the existing wiring aspect causes wiring complexity due to a plurality of driving devices, and burdens are caused to wiring installation personnel.
On the basis of the structure, if a plurality of devices are arranged, one PLC is matched with one device, and therefore connection control among the devices becomes complex when the devices and the PLCs are arranged. In order to simplify the wiring operation, it is necessary to use an intermediate module for the connection to change the line power supply.
Disclosure of Invention
The invention aims to solve the technical problems in the related technology to a certain extent at least aiming at the defects in the prior art, and provides a hard start, soft start and variable frequency start integrated switching module so as to achieve the purposes of conveniently controlling transfer operation and conveniently starting, controlling and switching equipment.
In order to solve the technical problems, the technical scheme of the invention is as follows: a hard start, soft start and variable frequency start integration switching module comprises a plurality of signal wiring ports, a power supply conversion module, an indicator light module and a relay module, wherein each signal wiring port is used for connecting an external signal for input or output, the signal wiring ports are connected with the power supply conversion module, the power supply conversion module is connected with a plurality of relay modules and used for providing working power supply, and the signal wiring ports are also connected with the indicator light module and used for indicating signal states;
the power conversion module comprises a ship-shaped switch, an AC/DC module, a fuse and a signal output which are sequentially connected in series,
one end of a coil of the relay module is connected to the signal wiring port, the other end of the coil is grounded, and the switch contacts are connected to the signal wiring port respectively.
As specific embodiments of the present invention, the following may be preferred: the relay module comprises a relay coil, a switch contact and a diode; the diode is connected in parallel on the relay coil, and the positive pole ground connection of diode, the junction of the coil of relay and diode negative pole is used for connecting signal line port and is used for acquireing external control signal, the switch contact has two sets ofly, and every group switch contact is provided with three port, and a port is the end of opening normally, and a port is switching end, and a port is the end of closing normally.
As specific embodiments of the present invention, the following may be preferred: the relay module comprises an auxiliary relay connected on a relay coil in parallel, the coil of the auxiliary relay is connected with the relay coil in parallel, and the auxiliary relay is provided with a normally open contact.
As specific embodiments of the present invention, the following may be preferred: the coil portions of a plurality of the relay modules are connected in parallel with each other.
As specific embodiments of the present invention, the following may be preferred: the pilot lamp module includes a plurality of instruction groups, and every instruction group is including the signal end, current-limiting resistor, the lamp pearl of establishing ties in proper order, and the lamp pearl of every instruction group is ground jointly.
As specific embodiments of the present invention, the following may be preferred: the intelligent electric energy detection device also comprises a high-voltage isolating switch, a high-voltage circuit breaker, a voltage current transformer, an intelligent electric energy detection module, a controller, a grading frequency converter, a power conversion circuit, a filter reactor, a variable reactance converter and a capacitor bank;
the three-phase power supply connects gradually high-voltage isolator, high-voltage circuit breaker's output passes through the second contact switch and connects outside electrical equipment, still concatenate variable reactance converter on outside electrical equipment through first contact switch, still connect filter reactor and connect in parallel on outside electrical equipment through the third contact switch, voltage current transformer sets up and provides detected signal and gives intelligent electric energy detection module on the power supply line, intelligent electric energy detection module connection director, hierarchical converter and power transformation circuit are controlled respectively to the controller, variable reactance converter is connected to hierarchical converter, power transformation circuit connects filter reactor and capacitor bank.
As specific embodiments of the present invention, the following may be preferred: the signal wiring ports are provided in three, one having 8 terminals and two having 12 terminals.
As specific embodiments of the present invention, the following may be preferred: the capacitor bank comprises a plurality of parallel capacitor branches, and each capacitor branch comprises a fuse, a contact switch and a capacitor which are connected in series.
The technical effects of the invention are mainly reflected in the following aspects:
1. the connection of a plurality of signal line interfaces is realized, the connection is very convenient and fast, a controller can be carried to realize the transfer of signals, equipment can be carried to realize the switching of the equipment, a frequency converter can be carried to realize the switching of modes such as frequency conversion starting, hard starting, soft starting and the like;
2. the circuit design adopts a modular structure, so that the structure cost is reduced, the stability is good, and the switching requirement of the electrified equipment of a user can be met;
3. has multi-aspect signal indication and operability, and safe and reliable work.
Drawings
FIG. 1 is a schematic diagram of a power conversion module according to an embodiment;
FIG. 2 is an eight pin signal connection port of an embodiment;
FIG. 3 is a twelve-pin signal connection port of the embodiment;
FIG. 4 is another twelve-pin signal connection port of the embodiment;
FIG. 5 is a schematic circuit diagram of an indicator light module;
FIG. 6 is a circuit diagram of a first relay;
FIG. 7 is a circuit diagram of a second relay;
FIG. 8 is a third relay circuit diagram;
FIG. 9 is a fourth relay circuit diagram;
fig. 10 is a circuit diagram of the switching module.
Reference numerals: 001. a signal wiring port; 002. a power conversion module; 021. a boat-shaped switch; 022. an AC/DC module; 023. a fuse; 024. outputting the signal; 003. an indicator light module; 031. a current limiting resistor; 032. a lamp bead; 033. a signal terminal; 004. a relay module; 041. a relay coil; 042. a switch contact; 043. a diode; 044. a normally open end; 045. a switching end; 046. a normally closed end; 051. a high voltage isolation switch; 052. a high voltage circuit breaker; 053. a voltage current transformer; 054. an intelligent electric energy detection module; 055. a controller; 056. a step frequency converter; 057. a power conversion circuit; 058. a filter reactor; 059. a variable reactance converter; 060. a capacitor bank.
Detailed Description
The embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, and the embodiments described below by referring to the drawings are exemplary and intended to explain the present invention so that the technical aspects of the present invention can be more easily understood and appreciated, and are not to be construed as limiting the present invention.
Example 1:
referring to fig. 1 to 9, as an embodiment, a hard start, soft start, and variable frequency start integrated switching module, which is combined with fig. 1, 2, 3, and 4, includes a signal connection port 001, a power conversion module 002, an indicator light module 003, and a relay module 004. The signal wiring ports 001 are provided in three, one having 8 terminals and two having 12 terminals. The names of signals on the interface side of the signal lines are defined by popular conventional nomenclature. L denotes a live wire, N denotes a zero line, and from fig. 2, there are sequentially a positive electrode signal of the running light, a negative electrode signal of the running light, a positive signal of the fault light, a negative signal of the fault light, a positive electrode output, a negative electrode output, and in fig. 3, an apparatus positive electrode, an apparatus negative electrode, a stop positive electrode, a stop negative electrode, a start positive electrode, a start negative electrode, a relay coil positive electrode, a relay coil negative electrode, a third relay coil positive electrode, a third relay coil negative electrode, a coil positive electrode of the running relay, and a negative electrode of the running relay coil 041. The thermal protection anode, the thermal protection cathode, the temperature fault signal anode, the temperature fault signal cathode, the high signal fault anode, the high signal fault cathode, the common terminal, the high temperature signal, the operation signal, the fault signal, the load signal, and the stop signal in fig. 4. The above signal user indicates that various signals can be connected and transferred, and in the circuit diagram, the same symbol names indicate common connections.
The signal line port sets up a plurality ofly, and every signal line port is used for connecting external signal and carries out input or output, and power conversion module 002 is connected to the signal line port. The power conversion module 002 is connected with a plurality of relay modules 004 for providing working power supply, and the signal line port is also connected with an indicator lamp module 003 for indicating signal state. Referring to fig. 5, the indicator light module 003 includes a plurality of indicating groups, each indicating group includes a signal terminal 033, a current-limiting resistor 031, and a lamp bead 032 connected in series in sequence, and the lamp beads 032 of each indicating group are grounded together.
Referring to fig. 1, the power conversion module 002 includes a boat switch 021, an AC/DC module 022, a fuse 023, and a signal output 024 connected in series in this order. When the device works, the commercial power can be converted, and a VCC power supply is output and is 5V voltage.
One end of a coil of the relay module 004 is connected to the signal wiring port 001, the other end of the coil is grounded, and the switch contacts 042 are connected to the signal wiring port 001 respectively.
Specifically, the relay module 004 may be a single general relay, repeater, or the like. Fig. 5 shows one type of a normal normally open relay. It is also possible to have a relay with two sets of switch contacts 042, as shown in fig. 6, the relay module 004 includes a relay coil 041, switch contacts 042, and a diode 043; the diode 043 is connected in parallel to the relay coil 041, the anode of the diode 043 is grounded, the junction of the relay coil and the cathode of the diode 043 is used for connecting signal line ports for obtaining external control signals, the switch contacts 042 are provided with two groups, each group of switch contacts 042 is provided with three ports, one port is a normally open end 044, one port is a switch end 045, and the other port is a normally closed end 046.
The two relays can also be combined in series or in parallel to form a relay module 004 in various ways.
Referring to fig. 8 and 9, the relay module 004 includes an auxiliary relay connected in parallel to a relay coil 041, the coil of the auxiliary relay being connected in parallel to the relay coil 041, the auxiliary relay having normally open contacts. The coil portions of the plurality of relay modules 004 are connected in parallel with each other.
Example 2:
based on the structure foundation of embodiment 1, as shown in fig. 10, the system further includes a high-voltage isolating switch 051, a high-voltage circuit breaker 052, a voltage-current transformer 053, an intelligent power detection module 054, a controller 055, a step frequency converter 056, a power conversion circuit 057, a filter reactor 058, a variable reactance converter 059, and a capacitor bank 060.
The three-phase power supply is sequentially connected with a high-voltage isolating switch 051 and a high-voltage circuit breaker 052, the output end of the high-voltage circuit breaker 052 is connected with external motor equipment through a second contact switch, a variable reactance converter 059 is connected on the external motor equipment in series through a first contact switch, a filter reactor 058 is connected on the external motor equipment in parallel through a third contact switch, a voltage current transformer 053 is arranged on a power supply line to provide a detection signal for an intelligent electric energy detection module 054, the intelligent electric energy detection module 054 is connected with a controller 055, the controller 055 respectively controls a grading frequency converter 056 and a power conversion circuit 057, the grading frequency converter 056 is connected with the variable reactance converter 059, and the power conversion circuit 057 is connected with the filter reactor 058 and a capacitor bank 060. The first contact switch KM1, the second contact switch KM2, and the third contact switch KM3 are switch contacts 042 of the corresponding relay in embodiment 1. Can be automatically controlled according to the requirement. In fig. 10, the capacitor bank 060 comprises a plurality of parallel capacitor branches, which comprise a fuse 023, a contact switch, a capacitor, connected in series with each other.
The motor has large starting current and small starting torque, and has adverse effect on the motor and a power grid. The variable frequency starting not only changes the terminal voltage of the motor, but also changes the voltage frequency, thereby leading the starting current to be smaller and the starting torque to be large, and meeting the requirement of the motor on the heavy-load soft starting performance. However, in the high-voltage high-power field, the maximum power of the frequency converter is relatively low, the cost is high, and the technology is complex, so that the neutral cost ratio of the frequency converter in the heavy-load soft start of the high-voltage motor is low. Meanwhile, harmonic waves generated in the operation process of the motor can also cause adverse effects on the power grid and the motor. The following problems need to be solved in order to realize the hierarchical frequency conversion soft start and the harmonic filtering of the motor: firstly, the starting current of the motor is limited, the starting torque is improved, the motor is stably started, and the energy is saved and the consumption is reduced; secondly, harmonic filtering is carried out in the starting process and the full-voltage operation process of the motor, so that the large impact of the harmonic on a power grid and the damage to the motor and dragging equipment are avoided, and the voltage stability of the power grid is ensured.
In the above embodiment 2, the variable reactance converter 059 is used to isolate the power supply line side of the motor stator from the thyristor circuit, and the controller 055 is used to control the on/off of the thyristor to obtain different current values, thereby changing the inductance value of the variable reactance converter 059. When the thyristor on the secondary side coil is completely conducted, the current on the secondary side coil reaches the maximum value, the primary reactance of the variable reactance converter 059 is the minimum, and the voltage drop falls on the stator end of the motor; when the thyristor is turned off, no current flows on the secondary side coil, the primary reactance of the variable reactance converter 059 is the maximum, and the terminal voltage of the stator of the motor is almost zero. Therefore, the reactance value of the variable reactance converter 059 can be changed by switching the thyristor on and off within one power supply cycle.
Stage 1: and (5) frequency conversion soft start. The contactor KM1 is closed through the controller 055, at the moment, a primary side winding of the variable reactance converter 059 and the motor are connected into a power grid in a series connection mode, the on-off of a thyristor in the step frequency converter 056 is controlled, the voltage is divided through the variable reactance converter 059, the voltage of the stator of the motor is gradually increased to a rated value, and therefore the soft start of the motor is achieved.
Stage 2: and passive harmonic filtering. And meanwhile, the contactors KM1 and KM3 are closed, and the primary winding of the filter reactor 058 is connected in series with the capacitor bank 060 and then connected to the line inlet end of the primary winding of the variable reactance converter 059. The controller 055 controls the on and off of the contactor KMn through the harmonic signal generated by the analysis circuit, so that the optimal capacitor is connected to the power grid; and meanwhile, other trigger pulse signals are output to control the conduction angle of a thyristor of the power conversion circuit 057 and adjust the optimal inductance value of a primary side winding of the filter reactor 058.
Stage 3: and ending the starting. When the voltage of the motor stator reaches a rated value, the contactor KM1 is disconnected, the contactor KM2 is closed, the soft start is finished, and the asynchronous motor enters a rated working state.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (8)
1. A hard start, soft start and variable frequency start integration switching module is characterized by comprising a plurality of signal wiring ports, a power supply conversion module, an indicator light module and a relay module, wherein each signal wiring port is used for connecting an external signal for input or output, the signal wiring ports are connected with the power supply conversion module, the power supply conversion module is connected with the relay modules and used for providing a working power supply, and the signal wiring ports are also connected with the indicator light module and used for indicating signal states;
the power conversion module comprises a ship-shaped switch, an AC/DC module, a fuse and a signal output which are sequentially connected in series,
one end of a coil of the relay module is connected to the signal wiring port, the other end of the coil is grounded, and the switch contacts are connected to the signal wiring port respectively.
2. The hard-start, soft-start, variable frequency start integrated handoff module of claim 1 wherein: the relay module comprises a relay coil, a switch contact and a diode; the diode is connected in parallel on the relay coil, and the positive pole ground connection of diode, the junction of the coil of relay and diode negative pole is used for connecting signal line port and is used for acquireing external control signal, the switch contact has two sets ofly, and every group switch contact is provided with three port, and a port is the end of opening normally, and a port is switching end, and a port is the end of closing normally.
3. The hard-start, soft-start, variable frequency start integrated handoff module of claim 2 wherein: the relay module comprises an auxiliary relay connected on a relay coil in parallel, the coil of the auxiliary relay is connected with the relay coil in parallel, and the auxiliary relay is provided with a normally open contact.
4. The hard-start, soft-start, variable frequency start integrated handoff module of claim 3 wherein: the coil portions of a plurality of the relay modules are connected in parallel with each other.
5. The hard-start, soft-start, variable frequency start integrated handoff module of claim 1 wherein: the pilot lamp module includes a plurality of instruction groups, and every instruction group is including the signal end, current-limiting resistor, the lamp pearl of establishing ties in proper order, and the lamp pearl of every instruction group is ground jointly.
6. The hard-start, soft-start, variable frequency start integrated handoff module of claim 1 wherein: the intelligent electric energy detection device also comprises a high-voltage isolating switch, a high-voltage circuit breaker, a voltage current transformer, an intelligent electric energy detection module, a controller, a grading frequency converter, a power conversion circuit, a filter reactor, a variable reactance converter and a capacitor bank;
the three-phase power supply connects gradually high-voltage isolator, high-voltage circuit breaker's output passes through the second contact switch and connects outside electrical equipment, still concatenate variable reactance converter on outside electrical equipment through first contact switch, still connect filter reactor and connect in parallel on outside electrical equipment through the third contact switch, voltage current transformer sets up and provides detected signal and gives intelligent electric energy detection module on the power supply line, intelligent electric energy detection module connection director, hierarchical converter and power transformation circuit are controlled respectively to the controller, variable reactance converter is connected to hierarchical converter, power transformation circuit connects filter reactor and capacitor bank.
7. The hard-start, soft-start, variable frequency start integrated handoff module of claim 1 wherein: the signal wiring ports are provided in three, one having 8 terminals and two having 12 terminals.
8. The hard-start, soft-start, variable frequency start integrated handoff module of claim 1 wherein: the capacitor bank comprises a plurality of parallel capacitor branches, and each capacitor branch comprises a fuse, a contact switch and a capacitor which are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993179.0A CN111969894A (en) | 2020-09-21 | 2020-09-21 | Hard start, soft start, frequency conversion start integration switching module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993179.0A CN111969894A (en) | 2020-09-21 | 2020-09-21 | Hard start, soft start, frequency conversion start integration switching module |
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| CN111969894A true CN111969894A (en) | 2020-11-20 |
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| CN202010993179.0A Pending CN111969894A (en) | 2020-09-21 | 2020-09-21 | Hard start, soft start, frequency conversion start integration switching module |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1100190A2 (en) * | 1999-11-12 | 2001-05-16 | Lg Electronics Inc. | Device and method for controlling the current supply and the static capacitance of a compressor |
| CN202231652U (en) * | 2011-09-13 | 2012-05-23 | 威海铁鹰数控有限公司 | AC motor controller |
| CN203368375U (en) * | 2013-07-08 | 2013-12-25 | 武汉理工大学 | Motor grading frequency conversion heavy duty soft starting and harmonic wave filtering integrated apparatus |
| CN104198960A (en) * | 2014-09-25 | 2014-12-10 | 聊城市科特祥瑞新能源有限公司 | LED lamp ageing inspection device |
-
2020
- 2020-09-21 CN CN202010993179.0A patent/CN111969894A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1100190A2 (en) * | 1999-11-12 | 2001-05-16 | Lg Electronics Inc. | Device and method for controlling the current supply and the static capacitance of a compressor |
| CN202231652U (en) * | 2011-09-13 | 2012-05-23 | 威海铁鹰数控有限公司 | AC motor controller |
| CN203368375U (en) * | 2013-07-08 | 2013-12-25 | 武汉理工大学 | Motor grading frequency conversion heavy duty soft starting and harmonic wave filtering integrated apparatus |
| CN104198960A (en) * | 2014-09-25 | 2014-12-10 | 聊城市科特祥瑞新能源有限公司 | LED lamp ageing inspection device |
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Application publication date: 20201120 |