CN201975927U - Thermosensitive resistance type temperature control circuit - Google Patents
Thermosensitive resistance type temperature control circuit Download PDFInfo
- Publication number
- CN201975927U CN201975927U CN2011201124573U CN201120112457U CN201975927U CN 201975927 U CN201975927 U CN 201975927U CN 2011201124573 U CN2011201124573 U CN 2011201124573U CN 201120112457 U CN201120112457 U CN 201120112457U CN 201975927 U CN201975927 U CN 201975927U
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- motor
- relay
- links
- control circuit
- temperature control
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Abstract
The utility model discloses a thermosensitive resistance type temperature control circuit which comprises a temperature sensor fixed on a motor stator winding, wherein the output end of the temperature sensor is connected with the input end of a bistable-state amplifier, and the output end of the bistable-state amplifier is connected with a power supply of a motor sequentially through a relay K1 and an alternating-current contactor K. As the temperature sensor is fixed on the motor stator winding, when temperature in the motor exceeds the allowed temperature of the stator winding, the resistance value of the temperature sensor is rapidly increased, the relay K1 powers off so that the alternating-current contactor K powers off, the power supply of the motor is switched off, and then the purpose of protecting the motor is achieved. Due to the thermosensitive resistance type temperature control circuit, the phenomena that the motor is burnt up by overcurrent, overhigh temperature and overload are greatly reduced, so that the motor has a better using effect.
Description
Technical field
The utility model belongs to temperature control circuit, belongs to a kind of thermosensitive resistance type temperature control circuit especially.
Technical background
When asynchronous machine moves, when motor occurs unusually, as overload, under voltage etc., the stator and rotor electric current meeting substantial deviation rated value of motor, the stator and rotor electric current of motor increases, and certainly will cause the loss of electric machine to strengthen, thereby cause motor temperature to raise, until burning motor.For squirrel cage induction motor, because starting current is very big, and the operating current of overcurrent protective device, thermal relay must escape starting current again when adjusting, and makes that like this current protective device is difficult to undesired overcurrent is shielded.
The utility model content
Technical problem to be solved in the utility model provides a kind ofly can go to control the break-make of motor power according to the motor windings variation of temperature, and plays the thermosensitive resistance type temperature control circuit of protection motor effect.
The technical scheme of the utility model technical solution problem is: a kind of thermosensitive resistance type temperature control circuit, comprise the temperature sensor that is fixed on the motor stator winding, the output of temperature sensor links to each other with the input of bistable amplifier, and the output of bistable amplifier links to each other with motor power by relay K 1, A.C. contactor K successively.
The utility model compared with prior art; the utility model is fixed on temperature sensor on the motor stator winding; when temperature in the motor surpasses the temperature that stator winding allowed; the resistance of temperature sensor sharply increases; relay K 1 dead electricity; thereby cause A.C. contactor K dead electricity, disconnect motor power, reach the purpose of protection motor.The situation that the utility model makes motor burn owing to overcurrent, excess temperature, overload significantly reduces, and result of use is relatively good.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
A kind of thermosensitive resistance type temperature control circuit, comprise the temperature sensor that is fixed on the motor stator winding, the output of temperature sensor links to each other with the input of bistable amplifier 1, and the output of bistable amplifier 1 links to each other with motor by relay K 1, A.C. contactor K successively.Described temperature sensor adopts the PTC thermistor, the PTC thermistor is fixed on the motor stator winding, one end of PTC thermistor links to each other with the end of potentiometer R, binding post T1, the T2 of another termination bistable amplifier 1 of potentiometer R, its control sensitivity of the resistance scalable of regulator potentiometer R.The binding post A1 of bistable amplifier 1 meets power firestreak L by fuse F, and the binding post A2 of bistable amplifier 1 meets zero-power line N, as shown in Figure 1.With epoxy resin the PTC thermistor is fixed on the motor stator winding, link to each other with T1, the T2 end of bistable amplifier 1 by potentiometer R, when temperature in the motor surpasses the temperature that stator winding allowed, PTC thermistor resistance sharply increases, and cuts off motor power by relay K 1, A.C. contactor K.
As shown in Figure 1, the coil of the output relay termination K1 of described bistable amplifier 1, the normally-closed contact 21 of relay K 1 meets the binding post A1 of bistable amplifier 1, the end of the normally-closed contact 22 indicator light L taking alarm of relay K 1, another termination zero-power line N of alarm lamp L, the normally opened contact 13 of relay K 1 meets the binding post A1 of bistable amplifier 1, the normally opened contact 14 of relay K 1 connects an end of A.C. contactor K coil, another termination zero-power line N of the coil of A.C. contactor K, the contact of A.C. contactor K connects motor.When motor temperature was too high, PTC thermistor resistance sharply increased 100 times and reaches 1K Ω.At this moment, relay K 1 dead electricity, its normally opened contact 13,14 disconnects, thereby causes A.C. contactor K dead electricity, disconnects motor power, and simultaneously, alarm lamp L is bright, reaches the purpose of protection motor.
As shown in Figure 1, the binding post A1 of described bistable amplifier 1 links to each other with the end of main switch S2, and the other end of main switch S2 links to each other with the end of fuse F, another termination power firestreak L of fuse F.The normally opened contact 14 of described relay K 1 links to each other with the end of stop button S0, and the other end of stop button S0 links to each other with the end of start button S1, and another termination of start button S1 links to each other with A.C. contactor K coil.
After increasing the utility model to motor, from ruuning situation, the situation that motor burns owing to overcurrent, excess temperature, overload significantly reduces, and result of use is relatively good; The utility model circuit design is simple, easy to use, cost is low, only needs to select suitable temperature transducer and motor stator winding to be fitted together and gets final product, and other need be provided with the place of overheat protector also to can be used for transformer, direct current machine etc.
Claims (5)
1. thermosensitive resistance type temperature control circuit, it is characterized in that: comprise the temperature sensor that is fixed on the motor stator winding, the output of temperature sensor links to each other with the input of bistable amplifier (1), and the output of bistable amplifier (1) links to each other with motor by relay K 1, A.C. contactor K successively.
2. thermosensitive resistance type temperature control circuit according to claim 1, it is characterized in that: described temperature sensor adopts the PTC thermistor, the PTC thermistor is fixed on the motor stator winding, one end of PTC thermistor links to each other with the end of potentiometer R, binding post T1, the T2 of another termination bistable amplifier (1) of potentiometer R, the binding post A1 of bistable amplifier (1) meets power firestreak L by fuse F, and the binding post A2 of bistable amplifier (1) meets zero-power line N.
3. thermosensitive resistance type temperature control circuit according to claim 1, it is characterized in that: the coil of the output relay termination K1 of described bistable amplifier (1), the normally-closed contact 21 of relay K 1 meets the binding post A1 of bistable amplifier (1), the end of the normally-closed contact 22 indicator light L taking alarm of relay K 1, another termination zero-power line N of alarm lamp L, the normally opened contact 13 of relay K 1 meets the binding post A1 of bistable amplifier (1), the normally opened contact 14 of relay K 1 connects an end of A.C. contactor K coil, another termination zero-power line N of the coil of A.C. contactor K, the contact of A.C. contactor K connects motor.
4. thermosensitive resistance type temperature control circuit according to claim 2, it is characterized in that: the binding post A1 of described bistable amplifier (1) links to each other with the end of main switch S2, the other end of main switch S2 links to each other with the end of fuse F, another termination power firestreak L of fuse F.
5. thermosensitive resistance type temperature control circuit according to claim 3, it is characterized in that: the normally opened contact of described relay K 1 (14) links to each other with the end of stop button S0, the other end of stop button S0 links to each other with the end of start button S1, and another termination of start button S1 links to each other with A.C. contactor K coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201124573U CN201975927U (en) | 2011-04-15 | 2011-04-15 | Thermosensitive resistance type temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201124573U CN201975927U (en) | 2011-04-15 | 2011-04-15 | Thermosensitive resistance type temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201975927U true CN201975927U (en) | 2011-09-14 |
Family
ID=44581025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201124573U Expired - Fee Related CN201975927U (en) | 2011-04-15 | 2011-04-15 | Thermosensitive resistance type temperature control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201975927U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427398A (en) * | 2013-07-15 | 2013-12-04 | 国家电网公司 | Motor temperature protecting device |
| CN103487761A (en) * | 2013-09-27 | 2014-01-01 | 国家电网公司 | Temperature control testing device for lithium ion battery |
| CN104158374A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | Permanent magnet synchronous motor with stator built-in temperature sensor and fatigue determination method |
| CN105138039A (en) * | 2015-08-27 | 2015-12-09 | 长安大学 | Cold area tunnel electric tracing temperature control circuit |
| CN110417193A (en) * | 2019-06-19 | 2019-11-05 | 福建凯威斯发电机有限公司 | A kind of generator with overcurrent and overheating protection |
-
2011
- 2011-04-15 CN CN2011201124573U patent/CN201975927U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427398A (en) * | 2013-07-15 | 2013-12-04 | 国家电网公司 | Motor temperature protecting device |
| CN103427398B (en) * | 2013-07-15 | 2015-12-23 | 国家电网公司 | A kind of motor temperature protector |
| CN103487761A (en) * | 2013-09-27 | 2014-01-01 | 国家电网公司 | Temperature control testing device for lithium ion battery |
| CN104158374A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | Permanent magnet synchronous motor with stator built-in temperature sensor and fatigue determination method |
| CN104158374B (en) * | 2014-08-21 | 2018-02-02 | 江西工埠机械有限责任公司 | Permagnetic synchronous motor and fatigue measurement method provided with stator built-in temperature sensor |
| CN105138039A (en) * | 2015-08-27 | 2015-12-09 | 长安大学 | Cold area tunnel electric tracing temperature control circuit |
| CN105138039B (en) * | 2015-08-27 | 2017-03-15 | 长安大学 | A kind of cold region tunnel electric heat tracing temperature control circuit |
| CN110417193A (en) * | 2019-06-19 | 2019-11-05 | 福建凯威斯发电机有限公司 | A kind of generator with overcurrent and overheating protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20140415 |