CN202693154U - Internal temperature detection circuit for PIM (Power Integrated Module) of low-power frequency converter - Google Patents
Internal temperature detection circuit for PIM (Power Integrated Module) of low-power frequency converter Download PDFInfo
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- CN202693154U CN202693154U CN 201220296083 CN201220296083U CN202693154U CN 202693154 U CN202693154 U CN 202693154U CN 201220296083 CN201220296083 CN 201220296083 CN 201220296083 U CN201220296083 U CN 201220296083U CN 202693154 U CN202693154 U CN 202693154U
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Abstract
The utility model provides an internal temperature detection circuit for a PIM (Power Integrated Module) of a low-power frequency converter, which comprises a self-excited multivibrator and an optocoupler, wherein the self-excited multivibrator comprises a thermistor arranged inside the PIM and the output end of the self-excited multivibrator is connected to the primary side of the optocoupler; and the secondary side of the optocoupler is connected with the output end of the detection circuit. According to the utility model, the temperature detection of the PIM can be implemented by using the thermistor, the common transistor optocoupler and the self-excited multivibrator.
Description
Technical field
The utility model relates to temperature sensing circuit, more particularly, relates to a kind of Small-power Inverter PIM inside modules temperature sensing circuit.
Background technology
Frequency converter is the industrial control product that combines that Power Electronic Technique and microelectric technique are used, and it has played the part of the angle sound of energy-conservation and automatic control by the speed governing of voltage and the frequency realization alternating current generator of change output in industry and national economy.
Frequency converter needs the temperature of inversion element IGBT inside is carried out Real Time Monitoring in operational process, prevents excess temperature, thereby avoids occurring irreversible damage.Because the PIM module small volume that Small-power Inverter uses, its inner temperature sensor is very near apart from forceful electric power, if directly use the AD Port detecting of weak-feedback side of transmission line, then can't satisfy the safety requirement.
The utility model content
The technical problems to be solved in the utility model is, and is too near apart from forceful electric power for temperature sensor in the above-mentioned PIM module temperature detection, be not inconsistent the problem that safety requires, and a kind of Small-power Inverter PIM inside modules temperature sensing circuit is provided.
The technical scheme in the invention for solving the above technical problem is, a kind of Small-power Inverter PIM inside modules temperature sensing circuit is provided, comprise free-running multivibrator, optocoupler, wherein: described free-running multivibrator comprises that the thermistor of being located at described PIM inside modules and the output terminal of this free-running multivibrator are connected to the former limit of described optocoupler; The secondary of described optocoupler connects the output terminal of described testing circuit.
In Small-power Inverter PIM inside modules temperature sensing circuit described in the utility model, described free-running multivibrator also comprises time base circuit, resistance R 4, fast recovery diode D1 and capacitor C 3, the pin P2 of wherein said time base circuit links to each other with P6, described fast recovery diode D1 and two ends after thermistor is in parallel are connected respectively to pin P7 and the pin P2 of described time base circuit, and the anode of described fast recovery diode D1 is connected to the first incoming level via resistance R 4, and an end of described capacitor C 3 is connected to the pin P2 of time base circuit, other end ground connection.
In Small-power Inverter PIM inside modules temperature sensing circuit described in the utility model, the pin P1 on the former limit of described optocoupler is connected to the pin P3 of described time base circuit via resistance R 3.
In Small-power Inverter PIM inside modules temperature sensing circuit described in the utility model, the pin P2 ground connection on the former limit of described optocoupler.
In Small-power Inverter PIM inside modules temperature sensing circuit described in the utility model, described time base circuit is the NE555 chip.
In Small-power Inverter PIM inside modules temperature sensing circuit described in the utility model, the pin P5 of described time base circuit is via capacitor C 2 ground connection.
In Small-power Inverter PIM inside modules temperature sensing circuit described in the utility model, the secondary of described optocoupler is provided with rc filter circuit.
In Small-power Inverter PIM inside modules temperature sensing circuit described in the utility model, described rc filter circuit comprises capacitor C 1, resistance R 1 and resistance R 2, wherein said resistance R 1 and resistance R 2 are serially connected with between the pin P4 and the second incoming level of secondary of described optocoupler, the pin P3 that one end of described capacitor C 1 is connected between resistance R 1 and the resistance R 2, the other end is connected to the secondary of described optocoupler, the two ends of described capacitor C 3 connect the output terminal of described testing circuit.
Small-power Inverter PIM inside modules temperature sensing circuit of the present utility model has following beneficial effect: by using thermistor, common transistor optocoupler and free-running multivibrator, can realize the temperature detection of PIM module, thereby replace the higher senior linear optical coupling of cost.Temperature sensing circuit of the present utility model is not only economical and practical, and meets the safety insulation request.
Description of drawings
Fig. 1 is the schematic diagram of the utility model Small-power Inverter PIM inside modules temperature sensing circuit embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Small-power Inverter PIM inside modules temperature sensing circuit of the present utility model comprises free-running multivibrator and optocoupler, wherein free-running multivibrator comprises the thermistor of being located at the PIM inside modules, and the output terminal of above-mentioned free-running multivibrator is connected to the former limit of optocoupler; The output terminal of the secondary connection detection circuit of optocoupler.
In the above-mentioned testing circuit, free-running multivibrator utilizes the variation of thermistor resistance, realizes the oscillator pulses width adjustment, i.e. output pulse width corresponding to different resistance values.Optocoupler is then realized the output pulse transmission of free-running multivibrator, and realizes the safety isolation.
As shown in Figure 1, be the schematic diagram of the utility model Small-power Inverter PIM inside modules temperature sensing circuit embodiment.In the present embodiment, free-running multivibrator also comprises time base circuit U1, resistance R 4, fast recovery diode D1 and capacitor C 3 except comprising thermistor RT.The pin P2 of time base circuit U1 links to each other with P6, fast recovery diode D1 and two ends (being terminal TEMP1 and the TEMP2 among Fig. 1, these two input ends that terminal is whole testing circuit) after thermistor RT is in parallel are connected respectively to pin P7 and the pin P2 of time base circuit U1.The anode of fast recovery diode D1 via resistance R 4 be connected to the first incoming level (+L), an end of capacitor C 3 is connected to the pin P2 of time base circuit U1, other end ground connection.
Especially, above-mentioned time base circuit U1 can adopt the NE555 chip.The pin P5 of this NE555 chip is via capacitor C 2 ground connection, and pin P4 is connected the first incoming level with P8, pin P1 ground connection.
Optocoupler U2 can adopt common transistor optocoupler, and the pin P1 on the former limit of this optocoupler U2 is connected to the pin P3 of time base circuit U1 via resistance R 3, and the pin P2 ground connection on the former limit of optocoupler U2.By this mode, the output of time base circuit U1 is directly as the input of optocoupler U1.
In above-mentioned Small-power Inverter PIM inside modules temperature sensing circuit, can increase rc filter circuit at the secondary of optocoupler U2, carry out smothing filtering with the pulse that the former limit of optocoupler U2 is passed over.The size of the secondary output level of optocoupler U2 and fluctuation situation namely reflect the change in resistance situation of the thermistor in the PIM module.Above-mentioned level can directly be inputted the AD conversion mouthful of single-chip microcomputer, can record temperature in the PIM module by the value that detects this level.
Especially, above-mentioned rc filter circuit specifically can comprise capacitor C 1, resistance R 1 and resistance R 2, wherein resistance R 1 and resistance R 2 are serially connected with between the pin P4 and the second incoming level (Vcc) of secondary of optocoupler U2, the pin P3 that one end of capacitor C 1 is connected between resistance R 1 and the resistance R 2, the other end is connected to the secondary of optocoupler U2, output terminal TEMP, the GND of the two ends connection detection circuit of capacitor C 3.
The above; it only is the better embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (8)
1. Small-power Inverter PIM inside modules temperature sensing circuit, it is characterized in that: comprise free-running multivibrator, optocoupler, wherein: described free-running multivibrator comprises that the thermistor of being located at described PIM inside modules and the output terminal of this free-running multivibrator are connected to the former limit of described optocoupler; The secondary of described optocoupler connects the output terminal of described testing circuit.
2. Small-power Inverter PIM inside modules temperature sensing circuit according to claim 1, it is characterized in that: described free-running multivibrator also comprises time base circuit, resistance R 4, fast recovery diode D1 and capacitor C 3, the pin P2 of wherein said time base circuit links to each other with P6, described fast recovery diode D1 and two ends after thermistor is in parallel are connected respectively to pin P7 and the pin P2 of described time base circuit, and the anode of described fast recovery diode D1 is connected to the first incoming level via resistance R 4, and an end of described capacitor C 3 is connected to the pin P2 of time base circuit, other end ground connection.
3. Small-power Inverter PIM inside modules temperature sensing circuit according to claim 2, it is characterized in that: the pin P1 on the former limit of described optocoupler is connected to the pin P3 of described time base circuit via resistance R 3.
4. Small-power Inverter PIM inside modules temperature sensing circuit according to claim 3 is characterized in that: the pin P2 ground connection on the former limit of described optocoupler.
5. Small-power Inverter PIM inside modules temperature sensing circuit according to claim 2, it is characterized in that: described time base circuit is the NE555 chip.
6. Small-power Inverter PIM inside modules temperature sensing circuit according to claim 2, it is characterized in that: the pin P5 of described time base circuit is via capacitor C 2 ground connection.
7. each described Small-power Inverter PIM inside modules temperature sensing circuit according to claim 1-6, it is characterized in that: the secondary of described optocoupler is provided with rc filter circuit.
8. Small-power Inverter PIM inside modules temperature sensing circuit according to claim 7, it is characterized in that: described rc filter circuit comprises capacitor C 1, resistance R 1 and resistance R 2, wherein said resistance R 1 and resistance R 2 are serially connected with between the pin P4 and the second incoming level of secondary of described optocoupler, the pin P3 that one end of described capacitor C 1 is connected between resistance R 1 and the resistance R 2, the other end is connected to the secondary of described optocoupler, the two ends of described capacitor C 3 connect the output terminal of described testing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296083 CN202693154U (en) | 2012-06-21 | 2012-06-21 | Internal temperature detection circuit for PIM (Power Integrated Module) of low-power frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296083 CN202693154U (en) | 2012-06-21 | 2012-06-21 | Internal temperature detection circuit for PIM (Power Integrated Module) of low-power frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN202693154U true CN202693154U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220296083 Expired - Lifetime CN202693154U (en) | 2012-06-21 | 2012-06-21 | Internal temperature detection circuit for PIM (Power Integrated Module) of low-power frequency converter |
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| Country | Link |
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| CN (1) | CN202693154U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214395A (en) * | 2014-09-09 | 2014-12-17 | 南京普东兴生物科技有限公司 | Multipurpose driving circuit for optical gate or biochemical reagent accurate sampling electromagnetic valve |
| CN104330187A (en) * | 2014-11-04 | 2015-02-04 | 青岛歌尔声学科技有限公司 | Temperature detection system capable of realizing power saving mode |
-
2012
- 2012-06-21 CN CN 201220296083 patent/CN202693154U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214395A (en) * | 2014-09-09 | 2014-12-17 | 南京普东兴生物科技有限公司 | Multipurpose driving circuit for optical gate or biochemical reagent accurate sampling electromagnetic valve |
| CN104330187A (en) * | 2014-11-04 | 2015-02-04 | 青岛歌尔声学科技有限公司 | Temperature detection system capable of realizing power saving mode |
| CN104330187B (en) * | 2014-11-04 | 2017-12-19 | 青岛歌尔声学科技有限公司 | A kind of system for detecting temperature of achievable battery saving mode |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160222 Address after: Shenzhen City, Guangdong province Baoan 518101 District 70 Liu Xian Road two Hongwei Industrial Park building E building 1-3 Patentee after: SHENZHEN INOVANCE TECHNOLOGY Co.,Ltd. Patentee after: SUZHOU INOVANCE TECHNOLOGY Co.,Ltd. Address before: 518101 Guangdong city of Shenzhen province Baoan District no 70 District Liu Xian two road Hongwei Dong Industrial Zone E Patentee before: SHENZHEN INOVANCE TECHNOLOGY Co.,Ltd. Patentee before: SUZHOU INOVANCE TECHNOLOGY Co.,Ltd. Patentee before: Suzhou Monarch Control Technology Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
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| CX01 | Expiry of patent term |