CN204269734U - One is high-voltage insulation monitoring device independently - Google Patents
One is high-voltage insulation monitoring device independently Download PDFInfo
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- CN204269734U CN204269734U CN201420779466.1U CN201420779466U CN204269734U CN 204269734 U CN204269734 U CN 204269734U CN 201420779466 U CN201420779466 U CN 201420779466U CN 204269734 U CN204269734 U CN 204269734U
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Abstract
The utility model discloses one independently high-voltage insulation monitoring device, comprise measuring transmitter unit, microprocessor control unit, current-limiting resistance, sample resistance and connector; This monitoring device by connector with treat that examining system is connected, treat that examining system comprises high-pressure system and level platform, there is between high-pressure system and level platform equivalent insulation resistance and equivalent leakage capacitance; Treat that examining system, measuring transmitter unit, sample resistance unit form a loop; Wherein, measuring transmitter is connected with microprocessor control unit respectively with sample resistance unit, and microprocessor control unit is connected with external unit by CAN port.Its reliability is high, precision is high, can monitor high-pressure system direct current component and AC portion insulation resistance simultaneously.
Description
Technical field
The utility model relates to one independently high-voltage insulation monitoring device, belongs to electric motor car high pressure assembly technical field.
Background technology
The high-pressure system of electric motor car adopts earth-free design, is namely insulation between high-pressure system and level platform.When the high voltage component insulating medium in high-pressure system is aging or be subject to wet environment affect time, high-pressure system can decline to the insulation resistance of level platform, may jeopardize the personal safety of driver and crew.In order to ensure the safety of driver and crew, electric motor car needs the insulation situation of installing insulating monitoring device Real-Time Monitoring high-pressure system.Insulated monitoring method comparatively conventional is at present incorporated to measuring resistance between high pressure both positive and negative polarity and ground, obtains the insulation resistance value of system by calculating the change in voltage between DC bus and level platform be incorporated to before and after resistance.But the method cannot monitor out high-pressure system AC portion and the insulation situation between inside battery and level platform, there is measurement result and be vulnerable to the shortcomings such as battery voltage ripple affects, dynamic measurement precision is low.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide one independently high-voltage insulation monitoring device, and reliability is high, precision is high, can monitor the design of high-pressure system direct current component and AC portion insulation resistance simultaneously to make it meet.
The technical solution of the utility model is as follows:
One is high-voltage insulation monitoring device independently, it is characterized in that, comprises measuring transmitter unit, microprocessor control unit, current-limiting resistance, sample resistance and connector; This monitoring device by connector with treat that examining system is connected, treat that examining system comprises high-pressure system and level platform, there is between high-pressure system and level platform equivalent insulation resistance and equivalent leakage capacitance; Treat that examining system, measuring transmitter unit, sample resistance unit form a loop; Wherein, measuring transmitter is connected with microprocessor control unit respectively with sample resistance unit, and microprocessor control unit is connected with external unit by CAN port.
An independently improvement project for high-voltage insulation monitoring device, the measuring circuit that the square-wave signal that described signal generator unit produces passes through comprises: high-pressure system, the equivalent insulation resistance between high-pressure system and level platform, equivalent leakage capacitance, current-limiting resistance and sample resistance.
An independently improvement project for high-voltage insulation monitoring device, described current-limiting resistance is made up of many resistant series or parallel connection, and the resistance of current-limiting resistance is greater than 2M Ω.
An independently improvement project for high-voltage insulation monitoring device, the resistance of described sample resistance is greater than 1k Ω.
An independently further improvement project for high-voltage insulation monitoring device, the resistance of described sample resistance is greater than 10k Ω.
When independently high-voltage insulation monitoring device is measured, the measurement electric current that measuring transmitter unit produces by the insulation resistance that will measure, leakage capacitance, whole high-pressure system, current-limiting resistance and sample resistance.Microprocessor control unit can obtain the insulation resistance of high-pressure system by the voltage signal calculating sample resistance.This high-voltage insulation monitoring device reliability is high, precision is high, can monitor high-pressure system direct current component and AC portion insulation resistance simultaneously.
Accompanying drawing explanation
Fig. 1 is the entity axonometric drawing of independently high-voltage insulation monitoring device.
Fig. 2 is the electrical schematic diagram of independently high-voltage insulation monitoring device.
Specific embodiments
Specific embodiments of the present utility model is described in detail below in conjunction with accompanying drawing.
Consult Fig. 1, Fig. 2, one is high-voltage insulation monitoring device independently, and it comprises measuring transmitter unit, microprocessor control unit, current-limiting resistance Ri, sample resistance Rm and connector; Independently high-voltage insulation monitoring device by connector with treat that examining system is connected, treat that examining system comprises high-pressure system and level platform, there is between high-pressure system and level platform equivalent insulation resistance and equivalent leakage capacitance; Treat examining system (high-pressure system and level platform), measuring transmitter unit, sample resistance unit form a loop; Wherein, measuring transmitter is connected with microprocessor control unit respectively with sample resistance unit, and microprocessor control unit is connected with external unit by CAN port.
The independently inner square-wave signal (frequency is very low, can be equivalent to direct current) being produced a Symmetrical by signal generator unit of high-voltage insulation monitoring device.The measuring circuit that this square-wave signal passes through comprises: whole high-pressure system, the equivalent insulation resistance between high-pressure system and level platform, equivalent leakage capacitance, current-limiting resistance Ri and sample resistance Rm.Electric current I m in measuring circuit can produce a sampling voltage Um on sample resistance Rm, and this voltage signal is gathered by microprocessor control unit, can be obtained the size of insulation resistance value by computing.The insulation resistance value calculated compares with predefined alarming value by microprocessor, externally exports insulation resistance value and warning message by CAN port.
Independently the current-limiting resistance Ri of high-voltage insulation monitoring device inside is generally greater than 2M Ω, by many resistant series or be formed in parallel.Current-limiting resistance not only can realize high-tension circuit and ground high-barrier from, also for limiting measurement electric current.About sample resistance Rm, insulation resistance value to be measured can be calculated by the peak value measuring its voltage.Sample resistance Rm voltage is square-wave voltage, and in order to ensure that sampled signal amplitude is convenient to measure, general resistance is greater than 1k Ω, more preferably greater than 10k Ω.
Microprocessor control unit has two functions, and one is that the voltage transformation of the output of measuring transmitter is become symmetrical square wave pulse voltage measuring-signal, and gating pulse width; Its two, carry out the calculating of insulation resistance value by the voltage signal of sample resistance and compare with predefined insulation alarm value.
Claims (5)
1. an independently high-voltage insulation monitoring device, is characterized in that, comprise measuring transmitter unit, microprocessor control unit, current-limiting resistance, sample resistance and connector; This monitoring device by connector with treat that examining system is connected, treat that examining system comprises high-pressure system and level platform, there is between high-pressure system and level platform equivalent insulation resistance and equivalent leakage capacitance; Treat that examining system, measuring transmitter unit, sample resistance unit form a loop; Wherein, measuring transmitter is connected with microprocessor control unit respectively with sample resistance unit, and microprocessor control unit is connected with external unit by CAN port.
2. according to one according to claim 1 independently high-voltage insulation monitoring device, it is characterized in that, the measuring circuit that the square-wave signal that described signal generator unit produces passes through comprises: high-pressure system, the equivalent insulation resistance between high-pressure system and level platform, equivalent leakage capacitance, current-limiting resistance and sample resistance.
3. according to one according to claim 1 independently high-voltage insulation monitoring device, it is characterized in that, described current-limiting resistance is made up of many resistant series or parallel connection, and the resistance of current-limiting resistance is greater than 2M Ω.
4. according to one according to claim 1 independently high-voltage insulation monitoring device, it is characterized in that, the resistance of described sample resistance is greater than 1k Ω.
5. according to one according to claim 4 independently high-voltage insulation monitoring device, it is characterized in that, the resistance of described sample resistance is greater than 10k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420779466.1U CN204269734U (en) | 2014-12-10 | 2014-12-10 | One is high-voltage insulation monitoring device independently |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420779466.1U CN204269734U (en) | 2014-12-10 | 2014-12-10 | One is high-voltage insulation monitoring device independently |
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| Publication Number | Publication Date |
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| CN204269734U true CN204269734U (en) | 2015-04-15 |
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| CN201420779466.1U Active CN204269734U (en) | 2014-12-10 | 2014-12-10 | One is high-voltage insulation monitoring device independently |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865506A (en) * | 2015-05-20 | 2015-08-26 | 王运国 | Insulation detection apparatus for DC gas system |
| CN106597242A (en) * | 2017-02-09 | 2017-04-26 | 北京长城华冠汽车科技股份有限公司 | High-voltage line insulation detecting device |
| CN109910615A (en) * | 2019-03-18 | 2019-06-21 | 北汽福田汽车股份有限公司 | The insulating Design method and apparatus of vehicle |
-
2014
- 2014-12-10 CN CN201420779466.1U patent/CN204269734U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865506A (en) * | 2015-05-20 | 2015-08-26 | 王运国 | Insulation detection apparatus for DC gas system |
| CN104865506B (en) * | 2015-05-20 | 2017-11-14 | 王运国 | A kind of insulation detection device of DC electrical system |
| CN106597242A (en) * | 2017-02-09 | 2017-04-26 | 北京长城华冠汽车科技股份有限公司 | High-voltage line insulation detecting device |
| CN109910615A (en) * | 2019-03-18 | 2019-06-21 | 北汽福田汽车股份有限公司 | The insulating Design method and apparatus of vehicle |
| CN109910615B (en) * | 2019-03-18 | 2020-10-16 | 北汽福田汽车股份有限公司 | Insulation design method and device for vehicle |
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