High-voltage DC insulating monitoring circuit for electric automobile

A high-voltage direct current, insulation monitoring technology, applied in electric vehicles, circuits or fluid pipelines, electrical devices, etc., to achieve the effect of simple circuit, low manufacturing cost, and ensuring the safety of people and vehicles

Inactive Publication Date: 2005-07-06
FANYA AUTOMOBILE TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increasing awareness of environmental protection, more and more attention has been paid to electric vehicles. In electric vehicles, the voltage of high-voltage power used for driving is very high (usually greater than DC 200V), so the safety of high-voltage power must be considered first, and Among them, the high-voltage direct current insulation is one of the main problems of high-voltage electric safety. At present, there is no high-voltage direct current insulation monitoring circuit for monitoring the operation status and safety performance of the high-voltage circuit on the electric vehicle.

Method used

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  • High-voltage DC insulating monitoring circuit for electric automobile
  • High-voltage DC insulating monitoring circuit for electric automobile
  • High-voltage DC insulating monitoring circuit for electric automobile

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Embodiment Construction

[0009] The present invention will be further described below with reference to the drawings and embodiments.

[0010] The present invention is a high-voltage DC insulation monitoring circuit for electric vehicles, which is composed of a filter 1, a protector 2, an operational amplifier 3, a voltage reference 4 and a voltage comparison circuit 5, and the composition block diagram is shown in Figure 1. When the insulation status exceeds the allowable range, an insulation fault signal is generated. The present invention is different from the prior art in that the high-voltage positive terminal and the negative terminal are connected to the positive terminal and the negative terminal of the amplifier respectively after passing through the filter circuit and the protection circuit to generate the reference voltage; at the same time, the high-voltage positive terminal passes through the voltage divider circuit to generate the measured voltage ; The reference voltage and the measured vol...

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Abstract

This invention relates to automobile high voltage DC insulation monitor circuit, wherein two input ends are connected to the high voltage output end; one end of the filter is connected to ground and the two output ends of the filter are connected to the two input ends of the protector; two output ends of the protector are connected to the two input ends of amplifier; output end of the amplifier is connected to the other end of the voltage comparing circuit; one end of the high voltage is connected to the one end of the division circuit and the other end of the division circuit is connected to the input end of the voltage comparing circuit.

Description

Technical field: [0001] The invention relates to a control device of an electric vehicle, in particular to a high-voltage direct current insulation monitoring circuit used in the control device of an electric vehicle. Background technique: [0002] With the increasing awareness of environmental protection, more and more attention has been paid to electric vehicles. In electric vehicles, the voltage of high-voltage power used to drive is very high (usually greater than 200V DC), so the safety of high-voltage power must be considered first. Among them, high-voltage direct current insulation is one of the main problems of the safety of high-voltage power. Currently, there is no high-voltage direct current insulation monitoring circuit for monitoring the operating status and safety performance of high-voltage circuits on electric vehicles. Summary of the invention: [0003] The purpose of the present invention is to provide a high-voltage direct current insulation monitoring circuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60R16/02
Inventor 卓斌樊晓松陆珂伟郭海涛杨林
Owner FANYA AUTOMOBILE TECH CENT
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