CN204732855U - A kind of motor over-temperature controller - Google Patents
A kind of motor over-temperature controller Download PDFInfo
- Publication number
- CN204732855U CN204732855U CN201520533860.1U CN201520533860U CN204732855U CN 204732855 U CN204732855 U CN 204732855U CN 201520533860 U CN201520533860 U CN 201520533860U CN 204732855 U CN204732855 U CN 204732855U
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- motor
- contactor
- temperature
- relay
- power supply
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Abstract
A kind of motor over-temperature controller, comprise circuit for controlling motor and temperature-control circuit, wherein, described circuit for controlling motor comprises control switch and A.C. contactor, described A.C. contactor comprises main contacts and secondary contact, described main contacts is connected between motor and power supply, described temperature-control circuit comprises temperature sensing device and relay, described temperature sensing device controls described relay on-off, and the secondary contact series of the contact of described relay and the coil-end of described A.C. contactor and described A.C. contactor is connected between the two-phase of described power supply.Adopt comparator to carry out design comparison circuit, only needing, a preset potential is set and comes to compare with the partial pressure potential of thermistor, and export control signal control relay thus control A.C. contactor, motor finally can be made to quit work in overtemperature situation.
Description
Technical field
The utility model relates to motor driven control field, particularly a kind of motor over-temperature controller.
Background technology
Motor is a kind of conventional electric elements, in the work of motor, inevitably produce a large amount of heats.These heats then can produce considerable influence to the performance of motor, therefore in the prior art, all can consider to cool to motor.Existing motor is in use arrange heat dissipation channel mostly, and what some heat was more also can arrange some radiator fans etc., and these are all rely on cross-ventilation to cool.
Although aforesaid way can alleviate the heat that motor produces to a certain extent, but due to the continuity of motor operating time, the heat of generation can not leave by heat completely, therefore cause heat constantly to accumulate, then can cause motor over-temperature, thus cause machine or equipment fault.
In prior art, solve for overtemperature, be all generally adopt control chip to carry out temperature acquisition, thus carry out driving warning, although can deal with problems very well, this mode cost is higher, and design is comparatively complicated.
Utility model content
It is low that technical problem to be solved in the utility model is to provide a kind of cost, do not need to design corresponding software program, reliable and stable motor over-temperature controller.
In order to solve above technical problem, a kind of motor over-temperature controller of the utility model, comprise circuit for controlling motor and temperature-control circuit, wherein, described circuit for controlling motor comprises control switch and A.C. contactor, described A.C. contactor comprises main contacts and secondary contact, described main contacts is connected between motor and power supply, described temperature-control circuit comprises temperature sensing device and relay, described temperature sensing device controls described relay on-off, the secondary contact series of the contact of described relay and the coil-end of described A.C. contactor and described A.C. contactor is connected between the two-phase of described power supply.
Preferably, described control switch comprises opening switch and shutdown switch, and the coil-end of described opening switch, shutdown switch and A.C. contactor is connected in series between the two-phase of power supply, and the secondary contact of described A.C. contactor and opening switch are connected in parallel.
Preferably, described opening switch under normal conditions its contact is in normally open, and described shutdown switch plays contact under normal conditions and is in normally off.
Preferably, described relay is in normally off in its contact under normal conditions.
Preferably, described temperature-control circuit also comprises comparator, and described temperature sensing device controls described relay on-off by comparator.
Preferably, described temperature-control circuit also comprises temperature range regulating circuit, described temperature range regulating circuit comprises adjustable resistance and series connection with it is controlling the divider resistance R1 between power supply, described adjustable resistance is electrically connected the reverse input end of described comparator with divider resistance R1, described temperature sensing device is thermistor, described thermistor and divider resistance R3 are connected on and control between power supply, and described thermistor is electrically connected the input in the same way of described comparator with described divider resistance R3.
Preferably, described thermistor is nude film structure.
Preferably, described comparator controls described relay by triode, the output of described comparator connects the base stage of described triode by resistance R4, the emitter of described triode connects and controls power supply ground, and the collector electrode of described triode controls the VCC of power supply by the coil termination of relay.
Preferably, the coil two ends of described relay are connected in parallel the diode for absorbing inverse electromotive force.
Preferably, breaker protector and fuse is also provided with between described power supply and motor
Beneficial effect: adopt comparator to carry out design comparison circuit, only need to arrange a preset potential to compare with the partial pressure potential of thermistor, and export control signal control relay thus control A.C. contactor, motor finally can be made to quit work in overtemperature situation.
Adopt adjustable resistance to control preset potential to make, temperature controls point scope and can regulate, can in consideration motor Different periods work and its heat resistance difference of different motor, regulable control temperature.
Utilize the governing factor of secondary contact as A.C. contactor of A.C. contactor, the position of opening switch and shutdown switch is arranged more convenient, make the reliability of circuit higher.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the electromotor control circuit schematic diagram of the utility model motor over-temperature controller embodiment 1;
Fig. 2 is the temperature-control circuit schematic diagram of the utility model motor over-temperature controller embodiment 2.
Embodiment
Embodiment 1:
A kind of motor over-temperature controller of the utility model, comprise circuit for controlling motor and temperature-control circuit, wherein, described circuit for controlling motor comprises control switch and A.C. contactor, described A.C. contactor comprises main contacts and secondary contact, described main contacts is connected between motor and power supply, described temperature-control circuit comprises temperature sensing device and relay, described temperature sensing device controls described relay on-off, and the contact of described relay and the secondary contact series of described A.C. contactor are connected between described power supply and the coil-end of A.C. contactor.
Described control switch comprises opening switch SB2 and shutdown switch SB1, and the coil-end of described opening switch SB2, shutdown switch SB1 and A.C. contactor is connected in series between the two-phase of power supply, and and is provided with fuse FU2 between power supply.Be connected in parallel with opening switch SB2 after the contact of described relay K A and the secondary contact series of described A.C. contactor.
As shown in Figure 1, in the present embodiment, the 380V input voltage of motor comes from electric network source, and electric network source connects motor through the main contacts KM of residual current circuit breaker QF, fuse FU1, A.C. contactor.One end of shutdown switch SB1 connects power supply L3 end by RU2, the other end of shutdown switch SB1 connects one end of opening switch SB2, the other end of opening switch SB2 connects coil one end of A.C. contactor KM, and the coil other end of described A.C. contactor KM connects power supply L2 end by fuse.Opening switch SB2 under normal conditions its contact is in normally open, and shutdown switch SB1 plays contact under normal conditions and is in normally off.Be connected in parallel with opening switch SB2 after the contact of relay K A and the secondary contact series of described A.C. contactor.
Described relay under normal conditions its contact is in normally off.
Described temperature-control circuit also comprises comparator, and described temperature sensing device controls described relay on-off by comparator.Described temperature-control circuit also comprises temperature range regulating circuit, described temperature range regulating circuit comprises adjustable resistance and series connection with it is controlling the divider resistance R1 between power supply, described adjustable resistance is electrically connected the reverse input end of described comparator with divider resistance R1, described temperature sensing device is thermistor, described thermistor and divider resistance R3 are connected on and control between power supply, and described thermistor is electrically connected the input in the same way of described comparator with described divider resistance R3.Described comparator controls described relay by triode, the output of described comparator connects the base stage of described triode by resistance R4, the emitter of described triode connects and controls power supply ground, the collector electrode of described triode controls the VCC of power supply by the coil termination of relay, the coil two ends of described relay are connected in parallel the diode for absorbing inverse electromotive force.
Under normal circumstances, when wanting actuating motor, press opening switch SB2, the coil of A.C. contactor KM obtains electric, its main contacts closes, motor running, and secondly contact also closes, thus make converter self-locking by the secondary contact of relay K A contact and A.C. contactor KM, thus guarantee that motor normally runs; When stopping motor, press shutdown switch SB1, because the secondary contact of shutdown switch and A.C. contactor KM is at the same circuit, therefore when having no progeny in its pass, A.C. contactor relieves self-locking, then motor is out of service.In addition, when motor running, when motor over-temperature, the normally-closed contact of relay K A disconnects, then the coil-end dead electricity of A.C. contactor KM, motor is out of service.
The overtemperture control circuit of motor as shown in Figure 2.Regulate the resistance of adjustable R2 can be used for setting the 2 pin voltages of comparator U1A.Negative tempperature coefficient thermistor RT contacts with the tested part of motor.After measurand temperature raises, the resistance of RT resistance will reduce, and make the 3 pin current potentials of comparator U1A be greater than 2 pin current potentials, export high potential at its 1 pin, make triode VT saturation conduction, then the coil of relay K A obtains electric, the normally-closed contact KA being then connected to Fig. 1 disconnects, and motor is out of service.Thus protect motor.
Comparator U1A can adopt the AD822 of single supply low-power consumption.The thermistor RT of motor over-temperature control circuit does not encapsulate, and remainder can encapsulate separately.Whole circuit can adopt powered battery, also can the single-phase 220V voltage of power taking net entered step-down, rectification, filtering, voltage stabilizing after obtain VCC voltage whole circuit powered.Thermistor RT does not encapsulate to facilitate part tested with motor to contact.
In the present embodiment; be connected in parallel with opening switch SB2 after the contact of described relay K A and the secondary contact series of described A.C. contactor; the contact of certain described relay K A can to connect between shutdown switch SB1 and power supply etc.; as long as there is not with the secondary contact of described A.C. contactor the requirement that relation in parallel all can meet overtemperature prote in the contact of relay K A
Beneficial effect: adopt comparator to carry out design comparison circuit, only need to arrange a preset potential to compare with the partial pressure potential of thermistor, and export control signal control relay thus control A.C. contactor, motor finally can be made to quit work in overtemperature situation.
Adopt adjustable resistance to control preset potential to make, temperature controls point scope and can regulate, can in consideration motor Different periods work and its heat resistance difference of different motor, regulable control temperature.
Utilize the governing factor of secondary contact as A.C. contactor of A.C. contactor, the position of opening switch and shutdown switch is arranged more convenient, make the reliability of circuit higher
It is emphasized that protection range of the present utility model is including but not limited to above-mentioned embodiment.It should be pointed out that for a person skilled in the art, under the prerequisite not departing from the utility model principle, can also make some distortion and improvement, these also should be regarded as belonging to protection range of the present utility model.
Claims (10)
1. a motor over-temperature controller, comprise circuit for controlling motor and temperature-control circuit, it is characterized in that, described circuit for controlling motor comprises control switch and A.C. contactor, described A.C. contactor comprises main contacts and secondary contact, described main contacts is connected between motor and power supply, described temperature-control circuit comprises temperature sensing device and relay, described temperature sensing device controls described relay on-off, the secondary contact series of the contact of described relay and the coil-end of described A.C. contactor and described A.C. contactor is connected between the two-phase of described power supply.
2. motor over-temperature controller according to claim 1, it is characterized in that, described control switch comprises opening switch and shutdown switch, the coil-end of described opening switch, shutdown switch and A.C. contactor is connected in series between the two-phase of power supply, and the secondary contact of described A.C. contactor and opening switch are connected in parallel.
3. motor over-temperature controller according to claim 2, is characterized in that, described opening switch under normal conditions its contact is in normally open, and described shutdown switch plays contact under normal conditions and is in normally off.
4. motor over-temperature controller according to claim 2, is characterized in that, described relay under normal conditions its contact is in normally off.
5. motor over-temperature controller according to claim 1, is characterized in that, described temperature-control circuit also comprises comparator, and described temperature sensing device controls described relay on-off by comparator.
6. motor over-temperature controller according to claim 5, it is characterized in that, described temperature-control circuit also comprises temperature range regulating circuit, described temperature range regulating circuit comprises adjustable resistance and series connection with it is controlling the divider resistance R1 between power supply, described adjustable resistance is electrically connected the reverse input end of described comparator with divider resistance R1, described temperature sensing device is thermistor, described thermistor and divider resistance R3 are connected on and control between power supply, and described thermistor is electrically connected the input in the same way of described comparator with described divider resistance R3.
7. motor over-temperature controller according to claim 6, is characterized in that, described thermistor is nude film structure.
8. motor over-temperature controller according to claim 5, it is characterized in that, described comparator controls described relay by triode, the output of described comparator connects the base stage of described triode by resistance R4, the emitter of described triode connects and controls power supply ground, and the collector electrode of described triode controls the VCC of power supply by the coil termination of relay.
9. motor over-temperature controller according to claim 7, is characterized in that, the coil two ends of described relay are connected in parallel the diode for absorbing inverse electromotive force.
10. motor over-temperature controller according to claim 1, is characterized in that, is also provided with breaker protector and fuse between described power supply and motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533860.1U CN204732855U (en) | 2015-07-22 | 2015-07-22 | A kind of motor over-temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533860.1U CN204732855U (en) | 2015-07-22 | 2015-07-22 | A kind of motor over-temperature controller |
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| Publication Number | Publication Date |
|---|---|
| CN204732855U true CN204732855U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520533860.1U Expired - Fee Related CN204732855U (en) | 2015-07-22 | 2015-07-22 | A kind of motor over-temperature controller |
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| CN (1) | CN204732855U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634505A (en) * | 2017-10-10 | 2018-01-26 | 郑州财经学院 | A kind of electronic equipment with protection circuit |
| CN107911047A (en) * | 2018-01-09 | 2018-04-13 | 福建船政交通职业学院 | Reversing braking control electric wiring based on noise measuring |
| CN108649530A (en) * | 2018-07-11 | 2018-10-12 | 安徽华茂纺织股份有限公司 | A kind of threephase motor temperature control light current and forceful electric power isolation circuit |
-
2015
- 2015-07-22 CN CN201520533860.1U patent/CN204732855U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634505A (en) * | 2017-10-10 | 2018-01-26 | 郑州财经学院 | A kind of electronic equipment with protection circuit |
| CN107911047A (en) * | 2018-01-09 | 2018-04-13 | 福建船政交通职业学院 | Reversing braking control electric wiring based on noise measuring |
| CN108649530A (en) * | 2018-07-11 | 2018-10-12 | 安徽华茂纺织股份有限公司 | A kind of threephase motor temperature control light current and forceful electric power isolation circuit |
| CN108649530B (en) * | 2018-07-11 | 2024-04-09 | 安徽华茂纺织股份有限公司 | Temperature control weak current and strong current isolation circuit of three-phase motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20180722 |