CN111585470A - Multiple protection motor fixed steering control circuit - Google Patents
Multiple protection motor fixed steering control circuit Download PDFInfo
- Publication number
- CN111585470A CN111585470A CN202010579112.2A CN202010579112A CN111585470A CN 111585470 A CN111585470 A CN 111585470A CN 202010579112 A CN202010579112 A CN 202010579112A CN 111585470 A CN111585470 A CN 111585470A
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- Prior art keywords
- phase sequence
- phase
- contactor
- sequence
- positive
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- 230000004224 protection Effects 0.000 title claims abstract description 17
- 238000000819 phase cycle Methods 0.000 claims abstract description 120
- 230000001012 protector Effects 0.000 claims abstract description 18
- 230000002441 reversible effect Effects 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims 1
- 208000025274 Lightning injury Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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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
- H02P1/02—Details of starting control
- H02P1/022—Security devices, e.g. correct phase sequencing
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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
- H02H7/08—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 dynamo-electric motors
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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
- H02H7/08—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 dynamo-electric motors
- H02H7/09—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 dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/02—Details of stopping control
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Control Of Ac Motors In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The invention discloses a multi-protection motor fixed steering control circuit, which comprises an external 380V three-phase alternating current main power supply port R, S, T, a 220V single-phase secondary line power supply port L and a power supply port N, a positive phase sequence contactor KM1, a negative phase sequence contactor KM2, a phase failure protector K, bipolar circuit breakers QF1 and QF2, a stop button SB1, a start button SB2, a positive phase sequence running indicator lamp HD1 and a negative phase sequence running indicator lamp HD 2; the invention has simple circuit and simple operation, realizes multiple protection, can effectively prevent the motor from steering incorrectly and ensures the normal operation of the equipment.
Description
Technical Field
The invention relates to a control circuit, in particular to a motor fixed steering control circuit.
Background
In the field of industrial production, the direction of rotation of a three-phase asynchronous motor depends on the direction of rotation of the magnetic field inside, but the direction of rotation of the magnetic field in turn depends on the phase sequence of the three-phase alternating current, which determines the direction of rotation of the magnetic field. The direction of rotation of the motor is determined by the phase sequence of the three-phase alternating current applied to the stator windings, and changing the phase sequence changes the direction of rotation of the motor. If the phase sequence is wrong, the motor steering is abnormal. The operation direction required by most mechanical equipment such as large-scale water pumps is fixed and is not allowed to be changed randomly (except for mechanical equipment with reversible operation), otherwise, mechanical accidents can occur.
Disclosure of Invention
The invention aims to provide a motor fixed steering control circuit with multiple protections, which has the advantages of simple circuit, simple and convenient operation, reliable operation, multiple protection, effective prevention of motor steering error and guarantee of normal operation of mechanical equipment.
In order to achieve the purpose, the multi-protection motor fixed steering control circuit comprises an external 380V three-phase alternating current main power supply port R, S, T, a single-phase secondary power supply port L and a power supply port N of 220V, and further comprises a positive phase sequence contactor KM1, a negative phase sequence contactor KM2, a phase failure protector K, bipolar circuit breakers QF1 and QF2, a stop button SB1, a start button SB2, a positive phase sequence running indicator lamp HD1 and a negative phase sequence running indicator lamp HD 2.
The secondary line power supply port N is connected with a stop button SB1 in series through a bipolar breaker QF1, and is connected with the normally open contact of a positive phase sequence contactor KM1, the start button SB2 and the normally open contact of a negative phase sequence contactor KM2 in parallel, and then is connected with the upper end of the normally closed contact of a negative phase sequence contactor KM2 and the upper end of the normally closed contact of a positive phase sequence contactor KM1 respectively.
The lower end of the normally closed contact of the reverse phase sequence contactor KM2 is respectively connected with the upper end of the coil of the positive phase sequence contactor KM1 and the upper end of the positive phase sequence running indicator lamp HD 1.
The lower end of the normally closed contact of the positive phase sequence contactor KM1 is respectively connected with the upper end of a coil of the negative phase sequence contactor KM2 and the upper end of a negative phase sequence operation indicator lamp HD 2.
The lower end of the coil of the positive phase-sequence contactor KM1 and the lower end of the positive phase-sequence operation indicator lamp HD1 are connected in parallel and then connected with the lower end of a positive phase-sequence normally open contact K1 in the phase-missing protector K.
And the lower end of the coil of the negative phase sequence contactor KM2 and the lower end of the negative phase sequence operation indicator lamp HD2 are connected in parallel and then connected with the lower end of a negative phase sequence normally open contact K2 in the phase-missing protector K.
The upper end of a positive phase sequence normally open contact K1 in the phase-missing protector K is connected in parallel with the upper end of a negative phase sequence normally open contact K2, and then a series thermal relay FR normally closed contact is connected with one end of a bipolar circuit breaker QF 2; the other end of the bipolar breaker QF2 is connected to a secondary line power supply port L.
In the technical scheme, when the motor fixed steering control circuit with multiple protections is started, a 380V three-phase alternating-current power supply on a main power supply port R, S, T is firstly switched on, then two-pole circuit breakers QF1 and QF2 are manually closed, and at the moment, a phase-missing protector K starts to detect the power supply phase sequence.
If the phase sequence is positive and the phase is not lost, the K1 normally open contact is closed, and preparation is made for starting the positive phase sequence. When the start button SB2 is pressed, the coil of the positive phase-sequence contactor KM1 is energized. The positive phase sequence contactor KM1 normally open contact is closed and self-locked, the motor starts to rotate according to a positive phase sequence, and meanwhile, the positive phase sequence operation indicator lamp HD1 is lightened. In addition, the normally closed contacts of the positive phase-sequence contactor KM1 are interlocked, and the coil power supply of the negative phase-sequence contactor KM2 is disconnected.
If the phase sequence is the reverse phase sequence and the phase is not lost, the K2 normally open contact is closed, and preparation is made for starting the reverse phase sequence. When the start button SB2 is pressed, the coil of the reverse phase-sequence contactor KM2 is energized. The normally open contact of the reverse phase sequence contactor KM2 is closed and self-locked, the motor starts to rotate, and simultaneously, a reverse phase sequence operation indicator lamp HD1 is lightened. Since the main contact of the negative phase-sequence contactor is opposite in position R, S from the main contact of the positive phase-sequence contactor, the motor rotates in the same direction as the positive phase-sequence contactor. In addition, the normally closed contacts of the reverse phase sequence contactor KM2 are interlocked, and the coil power supply of the positive phase sequence contactor KM1 is disconnected.
When the motor rotates in any phase sequence, all contactors can be released by pressing the stop button SB1 and the hot relay trip, and the motor stops running. Or when the three-phase power supply is in phase failure, the voltage imbalance exceeds 8%, and the lightning stroke and the surge current are too large, the positive phase sequence normally open contact K1 in the phase failure protector K and the negative phase sequence normally open contact K2 are opened and released, the motor can stop running, and the multiple protection effect is achieved.
The multi-protection motor fixed steering control circuit has the advantages of reliable operation, simple circuit, simple and convenient operation, multiple protection, effective prevention of motor steering mismatching and guarantee of normal operation of equipment.
Drawings
Fig. 1 is a circuit diagram of the multiple protection motor fixed steering control of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the multi-protection motor-fixed steering control circuit of the present invention is further described in detail below with reference to the drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the multi-protection motor-fixed steering control circuit of the present embodiment includes an external 380V three-phase ac main power port R, S, T, a 220V single-phase secondary line power port L and a power port N, and is characterized in that: the motor fixed steering control circuit further comprises a positive phase sequence contactor KM1, a negative phase sequence contactor KM2, a phase missing protector K, bipolar circuit breakers QF1 and QF2, a stop button SB1, a start button SB2, a positive phase sequence operation indicator lamp HD1 and a negative phase sequence operation indicator lamp HD 2.
In this example, the secondary line power supply port N is connected in series with the stop button SB1 through the bipolar breaker QF1, and is connected in parallel with the normally open contact of the positive phase sequence contactor KM1, the start button SB2, and the normally open contact of the negative phase sequence contactor KM2, and then is connected with the upper end of the normally closed contact of the negative phase sequence contactor KM2 and the upper end of the normally closed contact of the positive phase sequence contactor KM1, respectively.
In the example, the lower end of the normally closed contact of the reverse phase sequence contactor KM2 is respectively connected with the upper end of the coil of the positive phase sequence contactor KM1 and the upper end of the positive phase sequence running indicator lamp HD 1.
In the example, the lower end of the normally closed contact of the positive phase sequence contactor KM1 is respectively connected with the upper end of the coil of the negative phase sequence contactor KM2 and the upper end of the negative phase sequence running indicator lamp HD 2.
In the example, the lower end of the coil of the positive phase-sequence contactor KM1 and the lower end of the positive phase-sequence operation indicator lamp HD1 are connected in parallel and then connected with the lower end of a positive phase-sequence normally open contact K1 in the phase-missing protector K.
In this example, the lower end of the coil of the reverse phase sequence contactor KM1 and the lower end of the reverse phase sequence operation indicator lamp HD2 are connected in parallel and then connected with the lower end of a reverse phase sequence normally open contact K2 inside the phase-missing protector K.
In the embodiment, the upper end of a positive phase sequence normally open contact K1 in the phase-missing protector K is connected in parallel with the upper end of a negative phase sequence normally open contact K2, and then is connected in series with a normally closed contact of a thermal relay FR and then is connected with one end of a bipolar circuit breaker QF 2; the other end of bipolar breaker QF2 is connected to secondary line power port L.
When the motor fixed steering control circuit with multiple protection in the example is started, the 380V three-phase alternating current power supply on the main power supply port R, S, T is firstly switched on, then the bipolar circuit breakers QF1 and QF2 are manually closed, and the phase-missing protector K detects and starts to detect the power supply phase sequence.
If the phase sequence is positive and not lack, the K1 normally open contact is closed, and the starting of the positive phase sequence is ready. When the start button SB2 is pressed, the coil of the positive phase-sequence contactor KM1 is energized. The positive phase sequence contactor KM1 normally open contact is closed and self-locked, the motor starts to rotate according to a positive phase sequence, and meanwhile, the positive phase sequence operation indicator lamp HD1 is lightened. In addition, the normally closed contacts of the positive phase-sequence contactor KM1 are interlocked, and the coil power supply of the negative phase-sequence contactor KM2 is disconnected.
In the example, if the phase sequence is the reverse phase sequence and the phase is not lost, the K2 normally open contact is closed to prepare for starting in the reverse phase sequence. When the start button SB2 is pressed, the coil of the reverse phase-sequence contactor KM2 is energized. The normally open contact of the reverse phase sequence contactor KM2 is closed and self-locked, the motor starts to rotate, and simultaneously, a reverse phase sequence operation indicator lamp HD1 is lightened. Since the main contact of the negative phase-sequence contactor is opposite in position R, S from the main contact of the positive phase-sequence contactor, the motor rotates in the same direction as the positive phase-sequence contactor. In addition, the normally closed contacts of the reverse phase sequence contactor KM1 are interlocked, and the coil power supply of the positive phase sequence contactor KM2 is disconnected.
In this example, when the motor is rotated in any phase sequence, all the contactors are released by pressing the stop button SB1 and the thermal trip, and the motor stops. Or the phase loss of the three-phase power supply and the voltage imbalance of the three-phase power supply exceed 8 percent, and when lightning stroke and surge current are too large, the positive phase sequence normally open contact K1 in the phase loss protector K and the negative phase sequence normally open contact K2 are opened and released, the motor can stop running, and multiple protection effects are achieved.
The multi-protection motor fixed steering control circuit has the advantages of reliable operation, simple circuit and simple and convenient operation, realizes multi-protection, can effectively prevent the motor from steering incorrectly, and ensures the normal operation of mechanical equipment.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The utility model provides a motor of multiple protection is fixed turns to control circuit, includes external 380V three-phase interchange main power supply port R, S, T, 220V's single-phase secondary line power supply port L and power supply port N, its characterized in that: the system also comprises a positive phase sequence contactor KM1, a negative phase sequence contactor KM2, a phase missing protector K, bipolar circuit breakers QF1 and QF2, a stop button SB1, a start button SB2, a positive phase sequence operation indicator lamp HD1 and a negative phase sequence operation indicator lamp HD 2;
the secondary line power supply port N is connected with a stop button SB1 in series through a bipolar breaker QF1, and is connected with a normally open contact of a positive phase sequence contactor KM1, a start button SB2 and a normally open contact of a negative phase sequence contactor KM2 in parallel, and then is respectively connected with the upper end of a normally closed contact of a negative phase sequence contactor KM2 and the upper end of a normally closed contact of a positive phase sequence contactor KM 1;
the lower end of the normally closed contact of the reverse phase sequence contactor KM2 is respectively connected with the upper end of a coil of the positive phase sequence contactor KM1 and the upper end of a positive phase sequence running indicator lamp HD 1;
the lower end of the normally closed contact of the positive phase sequence contactor KM1 is respectively connected with the upper end of a coil of a negative phase sequence contactor KM2 and the upper end of a negative phase sequence operation indicator lamp HD 2;
the lower end of the coil of the positive phase-sequence contactor KM1 and the lower end of the positive phase-sequence running indicator lamp HD1 are connected in parallel and then connected with the lower end of a positive phase-sequence normally open contact K1 in the phase-missing protector K;
the lower end of the coil of the negative phase sequence contactor KM2 and the lower end of the negative phase sequence operation indicator lamp HD2 are connected in parallel and then connected with the lower end of a negative phase sequence normally open contact K2 in the phase-missing protector K;
after the upper end of a positive phase sequence normally open contact K1 in the phase-missing protector K is connected with the upper end of a negative phase sequence normally open contact K2 in parallel, a normally closed contact FR of a thermal relay is connected in series and is connected with one end of a bipolar circuit breaker QF 2; the other end of the bipolar breaker QF2 is connected to a secondary line power supply port L.
2. The multiple protection motor fixed steering control circuit of claim 1, wherein: the phase-missing protector K comprises: dynamic open-phase, static open-phase protection, voltage unbalance protection, lightning protection and surge resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010579112.2A CN111585470A (en) | 2020-06-23 | 2020-06-23 | Multiple protection motor fixed steering control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010579112.2A CN111585470A (en) | 2020-06-23 | 2020-06-23 | Multiple protection motor fixed steering control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111585470A true CN111585470A (en) | 2020-08-25 |
Family
ID=72114673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010579112.2A Pending CN111585470A (en) | 2020-06-23 | 2020-06-23 | Multiple protection motor fixed steering control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111585470A (en) |
-
2020
- 2020-06-23 CN CN202010579112.2A patent/CN111585470A/en active Pending
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