CN203287120U - A motor temperature detecting circuit - Google Patents
A motor temperature detecting circuit Download PDFInfo
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- CN203287120U CN203287120U CN2013203373813U CN201320337381U CN203287120U CN 203287120 U CN203287120 U CN 203287120U CN 2013203373813 U CN2013203373813 U CN 2013203373813U CN 201320337381 U CN201320337381 U CN 201320337381U CN 203287120 U CN203287120 U CN 203287120U
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- 238000013021 overheating Methods 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 27
- 238000012360 testing method Methods 0.000 claims description 11
- -1 and resistance R 3 Substances 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000003750 conditioning effect Effects 0.000 abstract 2
- 230000001360 synchronised effect Effects 0.000 description 10
- 238000001914 filtration Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 description 1
- 101150102866 adc1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a motor temperature detecting circuit comprising a reference voltage conditioning circuit, a voltage-dividing measuring circuit, a temperature overheating limit value comparing circuit, and a master control chip. The output end of the reference voltage conditioning circuit and the output end of the voltage-dividing measuring circuit are connected with the two different input ends of the temperature overheating limit value comparing circuit, respectively. The output end of the voltage-dividing measuring circuit and the output end of the temperature overheating limit value comparing circuit are both connected with the master control chip. The motor temperature detecting circuit has advantages of fast response speed, low cost, a capability of being matched with multiple thermistors, a freely-set protection temperature value, and good universality.
Description
Technical field
The utility model relates to circuit field, particularly a kind of motor temperature testing circuit.
Background technology
New-energy automobile generally adopts permagnetic synchronous motor as power source at present, drives vehicle operating.And permagnetic synchronous motor must operate at certain temperature range; may cause the problems such as motor permanent magnet demagnetization if exceed its operating temperature range; therefore the temperature of motor is carried out Measurement accuracy, and carry out reliable overheating protection for guaranteeing that the permagnetic synchronous motor trouble free service is particularly important on the basis of Measurement accuracy.
Overheating protection form commonly used is carried out overheating protection for the dependence software detection at present, and, because the speed of software detection is relatively slow, can not measure very timely the overheated generation of permagnetic synchronous motor, therefore can not in time to power device, provide overheating protection.
The utility model content
The technical problems to be solved in the utility model just is: the problems referred to above that exist for prior art, but the utility model provides the motor temperature testing circuit that a kind of fast response time, cost are low, can mate multiple thermistor, protection temperature value free setting.
For achieving the above object, motor temperature testing circuit of the present utility model, comprise reference voltage modulate circuit, dividing potential drop metering circuit, temperature overheating limit value comparator circuit, main control chip, wherein, the output terminal of reference voltage modulate circuit and dividing potential drop metering circuit is connected respectively to two different input ends of temperature overheating limit value comparator circuit; The output terminal of the output terminal of dividing potential drop metering circuit and temperature overheating limit value comparator circuit all is connected on main control chip.
Further, above-mentioned reference voltage modulate circuit is a bleeder circuit, comprises resistance R 1, resistance R 2, capacitor C 1, and wherein, resistance R 1 is connected with power supply VCC, resistance R 2 ground connection, and resistance R 1 is connected with resistance R 2, and resistance R 2 two ends also are parallel with capacitor C 1.
Further, above-mentioned dividing potential drop metering circuit is comprised of resistance R 3, resistance R 4, resistance R 5, capacitor C 2, capacitor C 3 and the thermistor RT1 that is arranged on motor internal, wherein, resistance R 3 is connected with power supply, resistance R 5 and the equal ground connection of capacitor C 3, resistance R 3, capacitor C 2, resistance R 5 are cascaded successively, resistance R 4 be connected in parallel on capacitor C 2 and resistance R 5 two ends after capacitor C 3 is connected, thermistor RT1 is connected in parallel on capacitor C 2 two ends.
Further, the overheated limit value comparator circuit of said temperature comprises comparer UIA.
Further, above-mentioned comparer UIA is an operational amplifier, and the in-phase input end of operational amplifier is connected with the output terminal of reference voltage modulate circuit, and the inverting input of operational amplifier is connected with the output terminal of dividing potential drop metering circuit.
Principle of work of the present utility model is: thermistor RT1, be installed on permagnetic synchronous motor inside, and its resistance value changes with the temperature variation of installation place, is used for measuring the internal temperature of permagnetic synchronous motor.The dividing potential drop metering circuit changes corresponding resistance signal with motor temperature and is converted into voltage signal and carries out filtering and process, voltage signal after filtering is processed is delivered to a port of main control chip on the one hand, is completed the measurement of permagnetic synchronous motor internal temperature by main control chip; On the other hand; the overheated limit value comparator circuit of cut-in temperature; the voltage of getting on resistance R 2 in reference voltage modulate circuit corresponding to the overheating protection value compares; represent namely that greater than the voltage of getting on resistance R 2 motor temperature surpasses default protection value as its voltage; the temperature overheating limit value comparator circuit output low level signal that namely reverses, low level signal are delivered to main control chip and are carried out mistake and interrupt processing.
, with respect to prior art, the utlity model has following advantage and beneficial effect:
1, the utility model response time is low to moderate nanosecond, and fast response time can in time be measured the motor internal temperature, supports main control chip to carry out wrong interruption the fast, guarantees that motor safety efficiently moves.
2, but the utility model can mate multiple thermistor, protection temperature value free setting, highly versatile;
3, the utility model is simple in structure, cost is low.
Description of drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited only to this.
[embodiment 1]
As shown in Figure 1, the motor temperature testing circuit of the present embodiment, comprise reference voltage modulate circuit, dividing potential drop metering circuit, temperature overheating limit value comparator circuit, main control chip, wherein: the output terminal of reference voltage modulate circuit and dividing potential drop metering circuit is connected respectively to two different input ends of temperature overheating limit value comparator circuit; The output terminal of the output terminal of dividing potential drop metering circuit and temperature overheating limit value comparator circuit all is connected on main control chip.Above-mentioned reference voltage modulate circuit is a bleeder circuit, comprises resistance R 1, resistance R 2, capacitor C 1, and resistance R 1 is connected with power supply VCC, resistance R 2 ground connection, and resistance R 1 is connected with resistance R 2, and resistance R 2 two ends also are parallel with capacitor C 1; The overheated limit value comparator circuit of said temperature comprises comparer UIA.
[embodiment 2]
On the basis of embodiment 1, the motor temperature testing circuit of the present embodiment, its dividing potential drop metering circuit is comprised of resistance R 3, resistance R 4, resistance R 5, capacitor C 2, capacitor C 3 and the thermistor RT1 that is arranged on motor internal, wherein, resistance R 3 is connected with power supply, resistance R 5 and the equal ground connection of capacitor C 3, resistance R 3, capacitor C 2, resistance R 5 are cascaded successively, resistance R 4 be connected in parallel on capacitor C 2 and resistance R 5 two ends that are cascaded after capacitor C 3 is connected, above-mentioned thermistor RT1 is connected in parallel on capacitor C 2 two ends.
Comparer UIA in the present embodiment is an operational amplifier, and the in-phase input end of operational amplifier is connected with the output terminal of reference voltage modulate circuit, and the inverting input of operational amplifier is connected with the output terminal of dividing potential drop metering circuit.
In the present embodiment, thermistor RT1 is installed on permagnetic synchronous motor inside, and its resistance value changes with the temperature variation of installation place, is used for measuring the internal temperature of permagnetic synchronous motor.(what indicate in Fig. 1 is the connection of forward temperature coefficient thermistor, as adopting negative tempperature coefficient thermistor, needs the right-hand member of resistance R 4 is put by " A " in figure " B " point that moves in figure.) the dividing potential drop metering circuit changes corresponding resistance signal with motor temperature and be converted into voltage signal and carry out filtering and process, voltage signal after filtering is processed is sent into the ADC1 port of main control chip U2 on the one hand, is completed the measurement of permagnetic synchronous motor internal temperature by main control chip; Voltage signal after filtering is processed is sent on the other hand the voltage of getting on R2 in operational amplifier reference voltage modulate circuit corresponding to the overheating protection value and is compared; as its voltage greater than R2 upper voltage represent that namely motor temperature surpasses default protection value, the U1A output low level signal that namely reverses is delivered to main coremaking sheet and is carried out mistake and interrupt processing.
In the present embodiment, it is the dsp chip of DSP28035 that above-mentioned main control chip adopts model.In practical application, can adopt the realizations such as general dsp chip, PFGA, can be according to the real needs setting.
Be only below preferred implementation of the present utility model, protection domain of the present utility model also not only is confined to above-described embodiment, and all technical schemes that belongs under the utility model thinking all belong to protection domain of the present utility model.Should be pointed out that for those skilled in the art, the some improvements and modifications not breaking away under the utility model principle prerequisite, should be considered as protection domain of the present utility model.
Claims (5)
1. motor temperature testing circuit, it is characterized in that, comprise reference voltage modulate circuit, dividing potential drop metering circuit, temperature overheating limit value comparator circuit, main control chip, the output terminal of described reference voltage modulate circuit and described dividing potential drop metering circuit is connected respectively to two different input ends of temperature overheating limit value comparator circuit, and the output terminal of the output terminal of described dividing potential drop metering circuit and temperature overheating limit value comparator circuit all is connected on main control chip.
2. motor temperature testing circuit according to claim 1, it is characterized in that, described reference voltage modulate circuit is a bleeder circuit, comprise resistance R 1, resistance R 2, capacitor C 1, wherein, resistance R 1 is connected with power supply VCC, resistance R 2 ground connection, resistance R 1 is connected with resistance R 2, and resistance R 2 two ends also are parallel with capacitor C 1.
3. motor temperature testing circuit according to claim 1, it is characterized in that, described dividing potential drop metering circuit is comprised of resistance R 3, resistance R 4, resistance R 5, capacitor C 2, capacitor C 3 and the thermistor RT1 that is arranged on motor internal, wherein, resistance R 3 is connected with power supply, resistance R 5 and the equal ground connection of capacitor C 3, and resistance R 3, capacitor C 2, resistance R 5 are cascaded successively, resistance R 4 be connected in parallel on capacitor C 2 and resistance R 5 two ends after capacitor C 3 is connected, described thermistor RT1 is connected in parallel on capacitor C 2 two ends.
According to claim 1 to 3 arbitrary described motor temperature testing circuit, it is characterized in that, described temperature overheating limit value comparator circuit comprises comparer UIA.
5. motor temperature testing circuit according to claim 4, it is characterized in that, described comparer UIA is an operational amplifier, the in-phase input end of operational amplifier is connected with the output terminal of reference voltage modulate circuit, and the inverting input of operational amplifier is connected with the output terminal of dividing potential drop metering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203373813U CN203287120U (en) | 2013-06-13 | 2013-06-13 | A motor temperature detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203373813U CN203287120U (en) | 2013-06-13 | 2013-06-13 | A motor temperature detecting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203287120U true CN203287120U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203373813U Expired - Fee Related CN203287120U (en) | 2013-06-13 | 2013-06-13 | A motor temperature detecting circuit |
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| Country | Link |
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| CN (1) | CN203287120U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323134A (en) * | 2013-06-13 | 2013-09-25 | 成都联腾动力控制技术有限公司 | Motor controller overheating judging circuit |
| CN104965126A (en) * | 2015-06-30 | 2015-10-07 | 深圳市朗科智能电气股份有限公司 | Method used for measuring motor rotor coil internal resistance and motor overtemperature protection method |
| CN109163819A (en) * | 2018-10-15 | 2019-01-08 | 西安爱生技术集团公司 | One kind having linear high-precision unmanned vehicle engine cylinder temperature thermometer |
| CN114705314A (en) * | 2022-04-07 | 2022-07-05 | 荣信汇科电气股份有限公司 | Temperature change speed detection loop |
| CN116124317A (en) * | 2022-12-23 | 2023-05-16 | 苏州格远电气有限公司 | Motor temperature detection circuit |
-
2013
- 2013-06-13 CN CN2013203373813U patent/CN203287120U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323134A (en) * | 2013-06-13 | 2013-09-25 | 成都联腾动力控制技术有限公司 | Motor controller overheating judging circuit |
| CN103323134B (en) * | 2013-06-13 | 2015-07-15 | 成都联腾动力控制技术有限公司 | Motor controller overheating judging circuit |
| CN104965126A (en) * | 2015-06-30 | 2015-10-07 | 深圳市朗科智能电气股份有限公司 | Method used for measuring motor rotor coil internal resistance and motor overtemperature protection method |
| CN109163819A (en) * | 2018-10-15 | 2019-01-08 | 西安爱生技术集团公司 | One kind having linear high-precision unmanned vehicle engine cylinder temperature thermometer |
| CN114705314A (en) * | 2022-04-07 | 2022-07-05 | 荣信汇科电气股份有限公司 | Temperature change speed detection loop |
| CN116124317A (en) * | 2022-12-23 | 2023-05-16 | 苏州格远电气有限公司 | Motor temperature detection circuit |
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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 |
Granted publication date: 20131113 Termination date: 20150613 |
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| EXPY | Termination of patent right or utility model |