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Temperature detection and analysis method of vehicular motor controller

A technology of a motor controller and a diagnostic method, which is applied to thermometers, thermometers, and electrical devices that use electrical/magnetic components directly sensitive to heat, can solve problems such as low maintenance-free and poor system reliability, and achieve maintenance-free The effect of high reliability and reliability, guaranteed reliability and high reliability

Active Publication Date: 2013-01-02
奇瑞新能源汽车股份有限公司
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AI Technical Summary

Problems solved by technology

Traditional temperature detection and diagnosis are relatively simple, resulting in poor system reliability and low maintenance-free performance

Method used

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  • Temperature detection and analysis method of vehicular motor controller

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Embodiment 1

[0016] Such as figure 1 As shown, in the temperature detection and diagnosis method of the vehicle motor controller in this embodiment, the motor control system uses three temperature sensors (thermistors) to collect the temperature of the drive module, and the motor control system collects the temperature collected by the three temperature sensors. Average the temperature data of the temperature data, and remove the data of the temperature sensor with the largest difference between the temperature data and the average value, and then average the temperature data of the retained temperature sensor to obtain the actual temperature T0 of the drive module;

[0017] The motor control system sets thresholds T1 and T2, where T1<T2, when the actual temperature T0 of the drive module is lower than T1, the maximum power that the drive module can output is the peak power of the motor; when the actual temperature T0 of the drive module is between T1 and Between T2, the maximum power that...

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Abstract

The invention aims to provide a temperature detection and analysis method of a vehicular motor controller with high reliability, so that the measured MCU (microprogrammed control unit) temperature can be close to a real value to the maximal extent, and the MCU is protected according to temperature data, so as to reduce maintenance frequency of the system. In the temperature detection and analysis method of the vehicular motor controller, a motor control system utilizes at least two temperature sensors to collect temperature of a drive module, arranges all temperature data collected by the temperature sensor, eliminates the data with the maximal deviation, and finally controls the output power of the drive module according to the preserved temperature data. Temperature misjudgment due to the fact that one temperature sensor cannot normally work or the measurement deviation is large can be avoided through the temperature sensor with redundancy design, so that the reliability of collection of the MCU temperature data can be ensured, and the measured temperature data can be close to the real value to the maximal extent.

Description

technical field [0001] The invention relates to a temperature detection and diagnosis method of a motor controller (MCU) of a pure electric car. Background technique [0002] Now people have begun to pay more and more attention to the protection of the environment and the effective and rational use of energy. Therefore, pure electric vehicles with high efficiency, energy saving and environmental protection have become one of the development trends of the automobile industry. The electric drive system of pure electric vehicles can achieve the purpose of low energy consumption and zero emission, and has great market prospects. Due to the limitation of installation space, pure electric vehicles have strict requirements on the size of the motor drive system. Therefore, sine wave permanent magnet synchronous motors are generally used in the drive system of pure electric vehicles. The drive module of the MCU uses IGBT drive motors, which have reliable operation. , Small size, li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/22
Inventor 陈立冲罗晓王瑛
Owner 奇瑞新能源汽车股份有限公司
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