CN103311891A - Overheating delay protection self-lock device of electric motor - Google Patents
Overheating delay protection self-lock device of electric motor Download PDFInfo
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- CN103311891A CN103311891A CN2013102671186A CN201310267118A CN103311891A CN 103311891 A CN103311891 A CN 103311891A CN 2013102671186 A CN2013102671186 A CN 2013102671186A CN 201310267118 A CN201310267118 A CN 201310267118A CN 103311891 A CN103311891 A CN 103311891A
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Abstract
The invention provides an overheating delay protection self-lock device of an electric motor, belongs to the technical field of electric motor control and aims at providing a device capable of accurately controlling overheating delay shut-down protection self locking of the electric motor. The technical scheme is that the overheating delay protection self-lock device of the electric motor is characterized by comprising a breaker DZ1, an alternating current contactor CJ1, a thermal relay RJ1, a start button QA1, a stop button TA1, a fuse protector RT1, a fuse protector RT2, an indicating lamp XHD1, an indicating lamp XHD2, an intermediate relay ZJ1 and a time relay SJ1. The overheating delay protection self-lock device is suitable for various electric motors.
Description
Technical field
Motor overheating delay protection self-locking device of the present invention belongs to the electric machines control technology field.
Background technology
In the production practices, motor often can be because overload, winding failure or supply voltage be undesired etc. reason cause overheated so that damage and burn, production obstacle, economic loss have been caused, therefore need motor is carried out overtemperature protection, the shortcoming that existing motor protection against overheat device exists is that protector very easily produces misoperation when motor is protected, so that " protection " is nonsensical: when equipment full load long-term work, protector one direct acting makes equipment be in all the time run-stopping status; When apparatus overheat need to cut off the power supply stoppage protection, protector unstable and so that the outage not thorough, make equipment be burnt damage.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved is: a kind of device that can accurately control the self-locking of motor overheating time-delay stoppage protection is provided.
For solving the problems of the technologies described above; the technical solution adopted in the present invention is: motor overheating delay protection self-locking device; it is characterized in that: comprising: circuit breaker DZ1, A.C. contactor CJ1, thermal relay RJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2, intermediate relay ZJ 1 and time relay sj 1, wherein:
The coil of A.C. contactor CJ1 is CJ1.1, and main contacts is CJ1.2, and normally opened contact is CJ1.3, and normally-closed contact is CJ1.4;
The normally opened contact of thermal relay RJ1 is RJ1.1;
The coil of intermediate relay ZJ 1 is ZJ1.1, and normally-closed contact is ZJ1.2, and normally opened contact is ZJ1.3;
The coil of time relay sj 1 is SJ1.1, and the timing closing contact is SJ1.2;
The main circuit of motor D1 is: link to each other with the power end of motor D1 behind the main contacts CJ1.2 that the inlet wire termination three-phase alternating-current supply of described circuit breaker DZ1, the leading-out terminal of described circuit breaker DZ1 are connected in series A.C. contactor CJ1 successively and the thermal relay RJ1;
The control circuit structure of the overheated delay protection self-locking of described motor D1 is: link to each other with the control circuit positive source behind the end of the described stop button TA1 serial connection fuse RT1, the other end of stop button TA1 links to each other with the end of start button QA1 successively and after connecing the end of normally-closed contact CJ1.4 of the end of normally opened contact ZJ1.3 of an end, intermediate relay ZJ 1 of timing closing contact SJ1.2 of an end, time relay sj 1 of the normally opened contact CJ1.3 of A.C. contactor CJ1 and A.C. contactor CJ1; The other end of described start button QA1 successively and connect behind the end of normally opened contact RJ1.1 of the end of the other end, indicator light XHD1 of the normally opened contact CJ1.3 of A.C. contactor CJ1 and thermal relay RJ1 with the end of the coil CJ1.1 of A.C. contactor CJ1 and link to each other;
The other end of the coil CJ1.1 of described A.C. contactor CJ1 links to each other with the end of the normally-closed contact ZJ1.2 of intermediate relay ZJ 1, the other end of the normally opened contact RJ1.1 of described thermal relay RJ1 links to each other with the end of the coil SJ1.1 of time relay sj 1, the other end of the timing closing contact SJ1.2 of described time relay sj 1 and connect the other end of normally opened contact ZJ1.3 of intermediate relay ZJ 1 after link to each other with the end of the coil ZJ1.1 of intermediate relay ZJ 1, the other end of the normally-closed contact CJ1.4 of described A.C. contactor CJ1 links to each other with the end of indicator light XHD2;
The other end of the normally-closed contact ZJ1.2 of described intermediate relay ZJ 1 links to each other with the end of fuse RT2 successively and after connecing the other end of the other end of coil ZJ1.1 of the other end, intermediate relay ZJ 1 of coil SJ1.1 of the other end, time relay sj 1 of indicator light XHD1 and indicator light XHD2, and the other end of described fuse RT2 links to each other with the control circuit power cathode.
Compared with prior art, the present invention has following beneficial effect: the present invention has added the delay protection self-locking device, even when heat outage setting value is the specified position of motor, so that thermal protector when action, main circuit continues normal operation when motor overheating, reach delay time after, protective device begins action, because the existence of self-locking device, main circuit is thoroughly cut off, and motor is protected; If between time delay, it is normal that current of electric recovers, and thermal protector resets, and then main circuit can not be cut off, and has guaranteed the normal operation of motor, has avoided the generation of misoperation, and whole protective device circuit is simple, practical.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing:
Fig. 1 is main circuit diagram of the present invention;
Fig. 2 is control circuit figure of the present invention.
Embodiment
As depicted in figs. 1 and 2; motor overheating delay protection device of the present invention; comprise: circuit breaker DZ1, A.C. contactor CJ1, thermal relay RJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2, intermediate relay ZJ 1 and time relay sj 1, wherein:
The coil of A.C. contactor CJ1 is CJ1.1, and main contacts is CJ1.2, and normally opened contact is CJ1.3, and normally-closed contact is CJ1.4;
The normally opened contact of thermal relay RJ1 is RJ1.1;
The coil of intermediate relay ZJ 1 is ZJ1.1, and normally-closed contact is ZJ1.2, and normally opened contact is ZJ1.3;
The coil of time relay sj 1 is SJ1.1, and the timing closing contact is SJ1.2;
The main circuit of motor D1 is: link to each other with the power end of motor D1 behind the main contacts CJ1.2 that the inlet wire termination three-phase alternating-current supply of described circuit breaker DZ1, the leading-out terminal of described circuit breaker DZ1 are connected in series A.C. contactor CJ1 successively and the thermal relay RJ1;
The control circuit structure of the overheated delay protection self-locking of described motor D1 is: link to each other with the control circuit positive source behind the end of the described stop button TA1 serial connection fuse RT1, the other end of stop button TA1 links to each other with the end of start button QA1 successively and after connecing the end of normally-closed contact CJ1.4 of the end of normally opened contact ZJ1.3 of an end, intermediate relay ZJ 1 of timing closing contact SJ1.2 of an end, time relay sj 1 of the normally opened contact CJ1.3 of A.C. contactor CJ1 and A.C. contactor CJ1; The other end of described start button QA1 successively and connect behind the end of normally opened contact RJ1.1 of the end of the other end, indicator light XHD1 of the normally opened contact CJ1.3 of A.C. contactor CJ1 and thermal relay RJ1 with the end of the coil CJ1.1 of A.C. contactor CJ1 and link to each other;
The other end of the coil CJ1.1 of described A.C. contactor CJ1 links to each other with the end of the normally-closed contact ZJ1.2 of intermediate relay ZJ 1, the other end of the normally opened contact RJ1.1 of described thermal relay RJ1 links to each other with the end of the coil SJ1.1 of time relay sj 1, the other end of the timing closing contact SJ1.2 of described time relay sj 1 and connect the other end of normally opened contact ZJ1.3 of intermediate relay ZJ 1 after link to each other with the end of the coil ZJ1.1 of intermediate relay ZJ 1, the other end of the normally-closed contact CJ1.4 of described A.C. contactor CJ1 links to each other with the end of indicator light XHD2;
The other end of the normally-closed contact ZJ1.2 of described intermediate relay ZJ 1 links to each other with the end of fuse RT2 successively and after connecing the other end of the other end of coil ZJ1.1 of the other end, intermediate relay ZJ 1 of coil SJ1.1 of the other end, time relay sj 1 of indicator light XHD1 and indicator light XHD2, and the other end of described fuse RT2 links to each other with the control circuit power cathode.
When pressing start button QA1, A.C. contactor CJ1 self-locking energising, coil CJ1.1 gets electric, normally opened contact CJ1.3 adhesive, indicator light XHD1 is bright, and normally-closed contact CJ1.4 disconnects, and indicator light XHD2 goes out, main contacts CJ1.2 adhesive, main circuit energising operation; When pressing stop button TA1, A.C. contactor CJ1 vows electric tripping, coil CJ1.1 dead electricity, and normally opened contact CJ1.3 disconnects, and indicator light XHD1 goes out, and normally-closed contact CJ1.4 is closed, and indicator light XHD2 is bright, and main contacts CJ1.2 disconnects, and the main circuit outage is out of service.
When motor overheating breaks down, the normally opened contact RJ1.1 of thermal relay RJ1 is closed, the coil SJ1.1 of time relay sj 1 gets electric, reach delay time after, timing closing contact SJ1.2 is closed, intermediate relay ZJ 1 adhesive self-locking, this moment, coil ZJ1.1 continued electricly, and normally opened contact ZJ1.3 remains closed, and normally-closed contact ZJ1.2 disconnects, main circuit is thoroughly cut off, and motor is protected; If between time delay, it is normal that current of electric recovers, and thermal relay RJ1 resets, and main circuit can not be cut off but normally move work, has avoided the generation of misoperation.
Claims (1)
1. motor overheating delay protection self-locking device; it is characterized in that: comprising: circuit breaker DZ1, A.C. contactor CJ1, thermal relay RJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2, intermediate relay ZJ 1 and time relay sj 1, wherein:
The coil of A.C. contactor CJ1 is CJ1.1, and main contacts is CJ1.2, and normally opened contact is CJ1.3, and normally-closed contact is CJ1.4;
The normally opened contact of thermal relay RJ1 is RJ1.1;
The coil of intermediate relay ZJ 1 is ZJ1.1, and normally-closed contact is ZJ1.2, and normally opened contact is ZJ1.3;
The coil of time relay sj 1 is SJ1.1, and the timing closing contact is SJ1.2;
The main circuit of motor D1 is: link to each other with the power end of motor D1 behind the main contacts CJ1.2 that the inlet wire termination three-phase alternating-current supply of described circuit breaker DZ1, the leading-out terminal of described circuit breaker DZ1 are connected in series A.C. contactor CJ1 successively and the thermal relay RJ1;
The control circuit structure of the overheated delay protection self-locking of described motor D1 is: link to each other with the control circuit positive source behind the end of the described stop button TA1 serial connection fuse RT1, the other end of stop button TA1 links to each other with the end of start button QA1 successively and after connecing the end of normally-closed contact CJ1.4 of the end of normally opened contact ZJ1.3 of an end, intermediate relay ZJ 1 of timing closing contact SJ1.2 of an end, time relay sj 1 of the normally opened contact CJ1.3 of A.C. contactor CJ1 and A.C. contactor CJ1; The other end of described start button QA1 successively and connect behind the end of normally opened contact RJ1.1 of the end of the other end, indicator light XHD1 of the normally opened contact CJ1.3 of A.C. contactor CJ1 and thermal relay RJ1 with the end of the coil CJ1.1 of A.C. contactor CJ1 and link to each other;
The other end of the coil CJ1.1 of described A.C. contactor CJ1 links to each other with the end of the normally-closed contact ZJ1.2 of intermediate relay ZJ 1, the other end of the normally opened contact RJ1.1 of described thermal relay RJ1 links to each other with the end of the coil SJ1.1 of time relay sj 1, the other end of the timing closing contact SJ1.2 of described time relay sj 1 and connect the other end of normally opened contact ZJ1.3 of intermediate relay ZJ 1 after link to each other with the end of the coil ZJ1.1 of intermediate relay ZJ 1, the other end of the normally-closed contact CJ1.4 of described A.C. contactor CJ1 links to each other with the end of indicator light XHD2;
The other end of the normally-closed contact ZJ1.2 of described intermediate relay ZJ 1 links to each other with the end of fuse RT2 successively and after connecing the other end of the other end of coil ZJ1.1 of the other end, intermediate relay ZJ 1 of coil SJ1.1 of the other end, time relay sj 1 of indicator light XHD1 and indicator light XHD2, and the other end of described fuse RT2 links to each other with the control circuit power cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102671186A CN103311891A (en) | 2013-06-29 | 2013-06-29 | Overheating delay protection self-lock device of electric motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102671186A CN103311891A (en) | 2013-06-29 | 2013-06-29 | Overheating delay protection self-lock device of electric motor |
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| CN103311891A true CN103311891A (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013102671186A Pending CN103311891A (en) | 2013-06-29 | 2013-06-29 | Overheating delay protection self-lock device of electric motor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903456A (en) * | 1974-01-28 | 1975-09-02 | Franklin Electric Co Inc | Protector system for an electric motor |
| CN200983498Y (en) * | 2006-10-18 | 2007-11-28 | 肖鑫峰 | A phase-miss over-current protection start switch |
| CN102684158A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Overheat delay protection device for motor |
| CN102684160A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Overvoltage and overheating protection device |
-
2013
- 2013-06-29 CN CN2013102671186A patent/CN103311891A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903456A (en) * | 1974-01-28 | 1975-09-02 | Franklin Electric Co Inc | Protector system for an electric motor |
| CN200983498Y (en) * | 2006-10-18 | 2007-11-28 | 肖鑫峰 | A phase-miss over-current protection start switch |
| CN102684158A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Overheat delay protection device for motor |
| CN102684160A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Overvoltage and overheating protection device |
Non-Patent Citations (1)
| Title |
|---|
| 电子发烧友网: "农用无塔增压式供水器原理图", 《电子发烧友网》, 9 November 2008 (2008-11-09) * |
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Application publication date: 20130918 |