Circuit and method for detecting remaining power of motor drive controller of electric vehicle

A motor drive and controller technology, applied in the direction of measuring current/voltage, measuring resistance/reactance/impedance, instruments, etc., can solve the problems of endangering personal and vehicle safety, inability to accurately detect residual electricity of capacitors, poor stability, etc., to achieve Improve the warning effect, broaden the detection range, and have high practical effects
CN102749494AActive Publication Date: 2012-10-24DONGFANG ELECTRIC CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DONGFANG ELECTRIC CORP LTD
Publication Date
2012-10-24

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Abstract

The invention relates to remaining power detection technologies, in particular to a circuit and a method for detecting the remaining power of a motor drive controller of an electric vehicle. The circuit comprises a voltage sensor, a conditioning circuit, an MCU (Micro Controller Unit) and a prompting device, wherein the voltage sensor is connected with the conditioning circuit, the conditioning circuit is connected with the MCU, the MCU is connected with the prompting device, the voltage at the two terminals of a capacitor is acquired through an electrical isolation manner of the voltage sensor, the acquired signals are quickly subjected to processing and logical judgment by adopting the MCU, and a prompting signal indicating whether the remaining power of the capacitor is within a safety range or not is output by using the electrical isolation manner. According to the circuit and the method, the high-voltage remaining power remained in the capacitor can be effectively, accurately and reliably detected, so that an applicable range of remaining power voltage detection is widened, the anti-interference capability is higher, the structure is simple, the practicability is high, and the harmfulness on human bodies and the vehicles caused by the remaining power is effectively reduced.
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Description

technical field

[0001] The invention relates to residual electricity detection technology, in particular to an electric vehicle motor drive controller residual electricity detection circuit and method. Background technique

[0002] At present, the electric vehicle industry is developing vigorously. Electric vehicles have become the future development direction of the automobile industry due to their green advantages. However, there are still many technical bottlenecks restricting the industrialization and commercialization of electric vehicles. Among them, the electric drive system is One of the outstanding factors restricting the development of electric vehicles, the safe, stable and efficient operation of the electric drive system is the most critical factor affecting the overall performance of electric vehicles. Parallel capacitors in the main circuit of the electric drive system can effectively ensure the safe, stable and efficient operation of the electric drive system,...

Claims

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