CN204464962U - Motor phase failure protection warning circuit - Google Patents
Motor phase failure protection warning circuit Download PDFInfo
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- CN204464962U CN204464962U CN201520222782.3U CN201520222782U CN204464962U CN 204464962 U CN204464962 U CN 204464962U CN 201520222782 U CN201520222782 U CN 201520222782U CN 204464962 U CN204464962 U CN 204464962U
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- 239000003990 capacitor Substances 0.000 claims description 12
- 238000005284 basis set Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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Abstract
Motor phase failure protection warning circuit, belongs to Motor Control Field, and the utility model is for solving existing open-phase protection circuit of motor Problems existing.The utility model comprises three-phase breaker QS1, A.C. contactor KM, three-phase thermal relay FR, pile defection unit, phase shortage performance element and alarm unit; Three phase electric machine M is connected 380V AC power by main contacts KM-1 with QS1 that often open of the three-phase thermal relay FR that connects successively, A.C. contactor KM; Pile defection unit gathers the default phase signal of three phase electric machine M; Phase shortage performance element provides power supply by the circuit between KM-1 and QS1; Alarm unit provides power supply by the circuit between KM-1 and QS1; After pile defection unit inspection to default phase signal, driving phase shortage performance element disconnection A.C. contactor KM often opens main contacts KM-1, and then cuts off the power supply of three phase electric machine M, drives alarm unit to report to the police simultaneously.
Description
Technical field
The utility model relates to a kind of open-phase protection circuit, belongs to Motor Control Field.
Background technology
For three phase electric machine conventional in life, phase-deficient operation is one of major reason causing burn-down of electric motor.Special phase-lacking protective device is multiplex in the startup optimization circuit of large-size machine, generally uses zero sequence current mutual inductor to carry out open-phase protection, but the general product adopting foreign import, its cost is higher, and circuit connects cumbersome.And short circuit and overload protection be only equipped with for most middle and small motor.When circuit has a short trouble, air circuit QF can jump disconnected, and during overload, larger electric current can make thermal relay FR action, thus makes contactor KM coil losing electricity, plays a protective role.And when motor is in running, when causing phase shortage phenomenon to occur for a certain reason, motor will soon be burnt.
Summary of the invention
The utility model object is to solve existing open-phase protection circuit of motor Problems existing, provides a kind of motor phase failure protection warning circuit.
Motor phase failure protection warning circuit described in the utility model, it comprises three-phase breaker QS1, A.C. contactor KM, three-phase thermal relay FR, pile defection unit, phase shortage performance element and alarm unit;
Three phase electric machine M is connected 380V AC power by the main contacts KM-1 that often opens of the three-phase thermal relay FR that connects successively, A.C. contactor KM with three-phase breaker QS1;
Pile defection unit gathers the default phase signal of three phase electric machine M;
Phase shortage performance element provides power supply by the circuit often opened between three-phase main contacts KM-1 and three-phase breaker QS1 of A.C. contactor KM;
Alarm unit provides power supply by the circuit often opened between three-phase main contacts KM-1 and three-phase breaker QS1 of A.C. contactor KM;
After pile defection unit inspection to default phase signal, driving phase shortage performance element disconnection A.C. contactor KM often opens main contacts KM-1, and then cuts off the power supply of three phase electric machine M, drives alarm unit to report to the police simultaneously.
Advantage of the present utility model: motor phase failure protection warning circuit described in the utility model adopts some discrete component forming circuits; with low cost; applied range; and this circuit performance is stablized; detection sensitivity is high, once motor phase failure be detected, motor power is cut off in action immediately; and report to the police, allow staff's very first time to in-situ processing fault.Motor is avoided to be burnt.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of motor phase failure described in the utility model protection warning circuit.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, motor phase failure protection warning circuit described in present embodiment, it comprises three-phase breaker QS1, A.C. contactor KM, three-phase thermal relay FR, pile defection unit, phase shortage performance element and alarm unit;
Three phase electric machine M is connected 380V AC power by the main contacts KM-1 that often opens of the three-phase thermal relay FR that connects successively, A.C. contactor KM with three-phase breaker QS1;
Pile defection unit gathers the default phase signal of three phase electric machine M;
Phase shortage performance element provides power supply by the circuit often opened between three-phase main contacts KM-1 and three-phase breaker QS1 of A.C. contactor KM;
Alarm unit provides power supply by the circuit often opened between three-phase main contacts KM-1 and three-phase breaker QS1 of A.C. contactor KM;
After pile defection unit inspection to default phase signal, driving phase shortage performance element disconnection A.C. contactor KM often opens main contacts KM-1, and then cuts off the power supply of three phase electric machine M, drives alarm unit to report to the police simultaneously.
Embodiment two: present embodiment is described further execution mode one, pile defection unit comprises electric capacity C1, electric capacity C2, electric capacity C3 and voltage relay KV; One end of electric capacity C1 connects C phase, one end of electric capacity C2 connects B phase, one end of electric capacity C3 connects A phase, electric capacity C1, C2 are connected with the other end of C3 one end that A.C. contactor KM often leaves auxiliary contact KM-5 simultaneously, A.C. contactor KM often leaves one end of the other end connection voltage relay KV coil of auxiliary contact KM-5, and the other end of voltage relay KV coil connects zero line N;
Phase shortage performance element comprises single-phase circuit breaker QS2, stop button SB1, stop button SB3, start button SB2, auxiliary relay KA, indicator light HL1, indicator light HL2 and indicator light HL3;
Stop button SB1 and stop button SB3 is linked switch;
One end of single-phase circuit breaker QS2 connects live wire L3, and the other end of single-phase circuit breaker QS2 connects one end of stop button SB1 simultaneously, one end of stop button SB3, one end of A.C. contactor KM normally closed auxiliary contact KM-3, A.C. contactor KM often open one end of auxiliary contact KM-4 and one end of auxiliary relay KA normally opened contact KA-3;
The other end of stop button SB1 connects one end that one end of start button SB2 and A.C. contactor KM often leave auxiliary contact KM-2 simultaneously, the other end that the other end and the A.C. contactor KM of start button SB2 often open auxiliary contact KM-2 is connected one end of voltage relay KV normally-closed contact KV-1 simultaneously, the other end of voltage relay KV normally-closed contact KV-1 connects one end of auxiliary relay KA normally-closed contact KA-1, the other end of auxiliary relay KA normally-closed contact KA-1 connects one end of A.C. contactor KM coil, the other end of A.C. contactor KM coil connects one end of three-phase thermal relay FR normally closed auxiliary contact,
The other end of stop button SB3 connects one end of voltage relay KV normally opened contact KV-2 and one end of auxiliary relay KA normally opened contact KA-2 simultaneously, and the other end and the other end of auxiliary relay KA normally opened contact KA-2 of voltage relay KV normally opened contact KV-2 are connected one end of auxiliary relay KA coil simultaneously;
The other end of A.C. contactor KM normally closed auxiliary contact KM-3 connects one end of indicator light HL1;
A.C. contactor KM often leaves one end of the other end connection indicator light HL2 of auxiliary contact KM-4;
The other end of auxiliary relay KA normally opened contact KA-3 connects one end of indicator light HL3;
The other end of three-phase thermal relay FR normally closed auxiliary contact, the other end of auxiliary relay KA coil, the other end of indicator light HL1, the other end of indicator light HL2 are connected zero line N with the other end of indicator light HL3 simultaneously.
Operation principle:
The QS1 that closes is that electric motor starting work is prepared, and presses SB2 starter motor, and after pressing SB2, KM coil obtains electric, and KM-1 closes, and motor obtains electric work, and meanwhile, KM-2 closes self-locking; KM-4 closes, HL2 bright indication motor startup work; KM-5 close, for KV detect phase shortage prepare, motor not phase shortage time, the common node no-voltage of C1, C2, C3, KV coil must not be electric, once a certain phase phase shortage of motor, the common node of C1, C2, C3 has voltage to exist, there is voltage difference in KV coil two ends, KV coil obtains electric, and normally-closed contact KV-1 disconnects, KM coil losing electricity, its main contacts KM-1 disconnects, then motor power-off; KV-2 closes simultaneously, and KA coil obtains electric, and KA-2 closes self-locking, and it is the action that KM coil power is cut off in memory that this road is arranged, and KV-3 closes simultaneously, and the bright instruction of HL3 is now non-full-phase state.
Stop if wanting during normal work, press SB1, after pressing, KM coil losing electricity, KM-1 disconnects, and motor quits work, and KM-4 goes out simultaneously, and indication motor has quit work; If after non-full-phase state occurs, because of KA coil will electric adhesive and KA-2 closes self-locking, KA-1 is in off-state, makes KM wire loop disconnect and cannot carry out start-up operation.After open-phase fault is got rid of, startup need be carried out and operate, first must press SB1, allow KA coil losing electricity, cut off memory KA wire loop power supply, KA coil losing electricity, KA-1 recovers closed, at this moment presses SB2 again, again allow KM coil obtain electric, KM-1 closes, electric motor starting work.
HL1 is that motor stops power supply indicator of holding concurrently, and when motor stops, this lamp is bright.HL2 is motor rotation indicator light, when after dynamic turn of electric motor starting, this lamp is bright.HL3 is motor phase failure indicator light, and after phase shortage action appears in motor, this lamp is bright.
Embodiment three: present embodiment is described further execution mode one or two, basis set circuit, speech chip LQ46, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C4, electrochemical capacitor C5, electrochemical capacitor C6, NPN triode VT and loudspeaker BL when alarm unit comprises single-phase full bridge rectification circuit UR, NE555;
Two ac input ends of single-phase full bridge rectification circuit UR connect live wire L2 and live wire L3 respectively,
The cathode power supply output of single-phase full bridge rectification circuit UR simultaneously contact resistance R1 one end, NE555 time 8 pin of basis set circuit, one end of resistance R4 and one end of resistance R6;
The other end of resistance R1 simultaneously one end of contact resistance R2 and NE555 time basis set circuit 7 pin; 2 pin of basis set circuit and 6 pin when one end of the auxiliary relay KA normally opened contact KA-4 that the other end of resistance R2 connects simultaneously, NE555;
4 pin of basis set circuit when the other end of resistance R4 connects positive pole and the NE555 of electrochemical capacitor C5 simultaneously;
The other end of resistance R6 connects the positive pole power supply terminal of loudspeaker BL;
One end of 3 pin contact resistance R3 of NE555 time-base integrated circuit;
The other end of resistance R3 connects the positive pole of 3 pin of voice integrated chip LQ46, one end of resistance R5 and electrochemical capacitor C6 simultaneously;
The other end of resistance R5 connects 5 pin and 8 pin of voice integrated chip LQ46 simultaneously;
4 pin of voice integrated chip LQ46 connect the base stage of NPN triode VT;
The collector electrode of NPN triode VT connects the negative pole power supply terminal of loudspeaker BL;
5 pin of NE555 time-base integrated circuit are by electric capacity C4 ground connection;
The negative power supply output of single-phase full bridge rectification circuit UR connects the other end of the emitter of NPN triode VT, 1 pin of voice integrated chip LQ46, the negative pole of electrochemical capacitor C6, the negative pole of electrochemical capacitor C5,1 pin of NE555 time-base integrated circuit and auxiliary relay KA normally opened contact KA-4 simultaneously, and ground connection.
Operation principle: when phase shortage does not normally work motor, KA coil must not be electric, KA-4 is off-state, the resistance at this place is equivalent to infinity, then the result after itself and R1, R2 dividing potential drop, and the voltage that 2,6 pin of NE555 connect exceedes 2/3 of operating voltage, NE555 is in stable state, 3 pin of NE555 keep output low level, and subsequent conditioning circuit non-transformer, loudspeaker BL does not work.
When phase shortage appears in motor, KA coil obtains electric, then KA-4 closes, 2 pin of NE555 are pulled to low level, and 1/3, NE555 inner appearance the lower than operating voltage overturns, 3 pin of NE555 export high level, drive loudspeaker BL to carry out audio alert by voice integrated chip LQ46.
LQ46 is voice collector, the integrated circuit of the soft encapsulating structure of internal memory four language, and disposable burning voice are proposed by user, and producer's burning completes.
When LQ46 obtains working power, then its 4 pin exports voice signal, and drives loudspeaker to broadcast through the collector electrode of NPN triode.
Claims (3)
1. motor phase failure protection warning circuit, it is characterized in that, it comprises three-phase breaker QS1, A.C. contactor KM, three-phase thermal relay FR, pile defection unit, phase shortage performance element and alarm unit;
Three phase electric machine M is connected 380V AC power by the main contacts KM-1 that often opens of the three-phase thermal relay FR that connects successively, A.C. contactor KM with three-phase breaker QS1;
Pile defection unit gathers the default phase signal of three phase electric machine M;
Phase shortage performance element provides power supply by the circuit often opened between three-phase main contacts KM-1 and three-phase breaker QS1 of A.C. contactor KM;
Alarm unit provides power supply by the circuit often opened between three-phase main contacts KM-1 and three-phase breaker QS1 of A.C. contactor KM;
After pile defection unit inspection to default phase signal, driving phase shortage performance element disconnection A.C. contactor KM often opens main contacts KM-1, and then cuts off the power supply of three phase electric machine M, drives alarm unit to report to the police simultaneously.
2. motor phase failure protects warning circuit according to claim 1, and it is characterized in that, pile defection unit comprises electric capacity C1, electric capacity C2, electric capacity C3 and voltage relay KV; One end of electric capacity C1 connects C phase, one end of electric capacity C2 connects B phase, one end of electric capacity C3 connects A phase, electric capacity C1, C2 are connected with the other end of C3 one end that A.C. contactor KM often leaves auxiliary contact KM-5 simultaneously, A.C. contactor KM often leaves one end of the other end connection voltage relay KV coil of auxiliary contact KM-5, and the other end of voltage relay KV coil connects zero line N;
Phase shortage performance element comprises single-phase circuit breaker QS2, stop button SB1, stop button SB3, start button SB2, auxiliary relay KA, indicator light HL1, indicator light HL2 and indicator light HL3;
Stop button SB1 and stop button SB3 is linked switch;
One end of single-phase circuit breaker QS2 connects live wire L3, and the other end of single-phase circuit breaker QS2 connects one end of stop button SB1 simultaneously, one end of stop button SB3, one end of A.C. contactor KM normally closed auxiliary contact KM-3, A.C. contactor KM often open one end of auxiliary contact KM-4 and one end of auxiliary relay KA normally opened contact KA-3;
The other end of stop button SB1 connects one end that one end of start button SB2 and A.C. contactor KM often leave auxiliary contact KM-2 simultaneously, the other end that the other end and the A.C. contactor KM of start button SB2 often open auxiliary contact KM-2 is connected one end of voltage relay KV normally-closed contact KV-1 simultaneously, the other end of voltage relay KV normally-closed contact KV-1 connects one end of auxiliary relay KA normally-closed contact KA-1, the other end of auxiliary relay KA normally-closed contact KA-1 connects one end of A.C. contactor KM coil, the other end of A.C. contactor KM coil connects one end of three-phase thermal relay FR normally closed auxiliary contact,
The other end of stop button SB3 connects one end of voltage relay KV normally opened contact KV-2 and one end of auxiliary relay KA normally opened contact KA-2 simultaneously, and the other end and the other end of auxiliary relay KA normally opened contact KA-2 of voltage relay KV normally opened contact KV-2 are connected one end of auxiliary relay KA coil simultaneously;
The other end of A.C. contactor KM normally closed auxiliary contact KM-3 connects one end of indicator light HL1;
A.C. contactor KM often leaves one end of the other end connection indicator light HL2 of auxiliary contact KM-4;
The other end of auxiliary relay KA normally opened contact KA-3 connects one end of indicator light HL3;
The other end of three-phase thermal relay FR normally closed auxiliary contact, the other end of auxiliary relay KA coil, the other end of indicator light HL1, the other end of indicator light HL2 are connected zero line N with the other end of indicator light HL3 simultaneously.
3. motor phase failure protects warning circuit according to claim 2, it is characterized in that, basis set circuit, speech chip LQ46, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C4, electrochemical capacitor C5, electrochemical capacitor C6, NPN triode VT and loudspeaker BL when alarm unit comprises single-phase full bridge rectification circuit UR, NE555;
Two ac input ends of single-phase full bridge rectification circuit UR connect live wire L2 and live wire L3 respectively,
The cathode power supply output of single-phase full bridge rectification circuit UR simultaneously contact resistance R1 one end, NE555 time 8 pin of basis set circuit, one end of resistance R4 and one end of resistance R6;
The other end of resistance R1 simultaneously one end of contact resistance R2 and NE555 time basis set circuit 7 pin; 2 pin of basis set circuit and 6 pin when one end of the auxiliary relay KA normally opened contact KA-4 that the other end of resistance R2 connects simultaneously, NE555;
4 pin of basis set circuit when the other end of resistance R4 connects positive pole and the NE555 of electrochemical capacitor C5 simultaneously;
The other end of resistance R6 connects the positive pole power supply terminal of loudspeaker BL;
One end of 3 pin contact resistance R3 of NE555 time-base integrated circuit;
The other end of resistance R3 connects the positive pole of 3 pin of voice integrated chip LQ46, one end of resistance R5 and electrochemical capacitor C6 simultaneously;
The other end of resistance R5 connects 5 pin and 8 pin of voice integrated chip LQ46 simultaneously;
4 pin of voice integrated chip LQ46 connect the base stage of NPN triode VT;
The collector electrode of NPN triode VT connects the negative pole power supply terminal of loudspeaker BL;
5 pin of NE555 time-base integrated circuit are by electric capacity C4 ground connection;
The negative power supply output of single-phase full bridge rectification circuit UR connects the other end of the emitter of NPN triode VT, 1 pin of voice integrated chip LQ46, the negative pole of electrochemical capacitor C6, the negative pole of electrochemical capacitor C5,1 pin of NE555 time-base integrated circuit and auxiliary relay KA normally opened contact KA-4 simultaneously, and ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520222782.3U CN204464962U (en) | 2015-04-14 | 2015-04-14 | Motor phase failure protection warning circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520222782.3U CN204464962U (en) | 2015-04-14 | 2015-04-14 | Motor phase failure protection warning circuit |
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| CN204464962U true CN204464962U (en) | 2015-07-08 |
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| CN201520222782.3U Expired - Fee Related CN204464962U (en) | 2015-04-14 | 2015-04-14 | Motor phase failure protection warning circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018898A (en) * | 2016-08-12 | 2016-10-12 | 山东省产品质量检验研究院 | Massage device and electric heating food temperature rise testbed |
| CN106384939A (en) * | 2016-09-05 | 2017-02-08 | 衢州市依科达节能技术有限公司 | Distribution box with open-phase protection |
| CN108594053A (en) * | 2018-03-14 | 2018-09-28 | 四川川煤华荣能源股份有限公司 | Comprehensive protector of motor tester |
-
2015
- 2015-04-14 CN CN201520222782.3U patent/CN204464962U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018898A (en) * | 2016-08-12 | 2016-10-12 | 山东省产品质量检验研究院 | Massage device and electric heating food temperature rise testbed |
| CN106018898B (en) * | 2016-08-12 | 2019-03-01 | 山东省产品质量检验研究院 | A kind of massage apparatus testing stand |
| CN106384939A (en) * | 2016-09-05 | 2017-02-08 | 衢州市依科达节能技术有限公司 | Distribution box with open-phase protection |
| CN108594053A (en) * | 2018-03-14 | 2018-09-28 | 四川川煤华荣能源股份有限公司 | Comprehensive protector of motor tester |
| CN108594053B (en) * | 2018-03-14 | 2024-03-29 | 四川川煤华荣能源股份有限公司 | Tester for comprehensive protector of motor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20190414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |