Method for obtaining overall temperature of multi-drive-motor system for electric automobile
A technology for overall temperature and electric vehicles, applied to electric vehicles, electrical devices, vehicle components, etc., can solve the problem of not being able to cope with the temperature display of the motor system
Active Publication Date: 2020-10-23
DONGFENG MOTOR CORP HUBEI
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[0006] With the increasing number of vehicle-mounted motor systems and the internal temperature of the motor system, the above conventional display solutions are increasingly unable to meet the demand for temperature display of the motor system
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[0042] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail, convenient to understand the present invention clearly, but they are not construed as limiting the present invention.
[0043] Such as figure 1 As shown, the present invention provides a method for obtaining the overall temperature of a multi-drive motor system for an electric vehicle. The electric vehicle is equipped with a total of m independent single-drive motor systems, denoted as S 1 , S 2 ,...,S i ,...,S m , the comprehensive overall temperature of the multi-drive motor system is denoted as Z; among them, the single-drive motor system S i The overall temperature measure of is denoted as Y i , the single drive motor system has n internal temperature quantities, denoted as X i1 , X i2 ,...,X ij ,...,X in ; Through big data analysis and processing of the measured temperature data of each driving motor system, the motor system S i The...
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The invention provides a method for obtaining an overall temperature of a multi-drive motor system for an electric automobile. The method comprises the following steps: sampling to acquire a temperature value of an internal temperature quantity of a single system at a certain moment; obtaining a converted temperature value of the internal temperature quantity at the moment according to the temperature value and a corresponding distribution function; obtaining an overall temperature value of the single system at the moment according to the converted temperature value at the moment and a corresponding single system calculation model function; and obtaining a comprehensive overall temperature value of the multi-drive motor system at the moment according to the overall temperature values of all the single systems at the moment and an overall system calculation model function. In the invention, an automobile-mounted instrument (or a multimedia screen) can synchronously display an overall temperature change trend and state of all automobile-mounted motor systems or power domain controllers in real time.
Description
technical field [0001] The invention relates to the technical field of motor systems, in particular to a method for obtaining the overall temperature of a multi-drive motor system for an electric vehicle. Background technique [0002] Temperature is an important monitoring index of electric motor system, especially in the driving motor system of electric vehicle. The temperature change of the motor system directly affects the performance output of the motor system. Short-term overheating of the motor system will limit the performance output of the motor system, and long-term overheating will cause irreversible performance degradation of the motor system, such as demagnetization problems in permanent magnet motors. , winding insulation failure and so on. The over-temperature fault is different from other internal faults of the motor system. After the vehicle is mass-produced, whether this fault occurs is mainly affected by external factors; The driver feedbacks the changing...
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IPC IPC(8): B60L3/00B60L3/12
CPCB60L3/0061B60L3/12B60L2240/425B60L2220/42
Inventor 孙志华王华赵娜飞翟黎明徐黎明
Owner DONGFENG MOTOR CORP HUBEI