A motor controller accelerated life detection method and device
A motor controller and life-accelerating technology, which is applied in general control systems, control/regulation systems, electrical testing/monitoring, etc., can solve problems such as inaccurate life judgment of motor controllers, shorten the test period, reduce test costs, The effect of improving reliability
Active Publication Date: 2020-09-01
ZHENGZHOU YUTONG BUS CO LTD
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[0004] The purpose of the present invention is to provide a method and device for detecting the accelerated life of a motor controller, which is used to solve the problem of inaccurate judgment of the life of a motor controller in the prior art
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[0045] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0046] In order to quickly verify the life of the motor controller, the present invention provides a motor controller accelerated life detection method, such as figure 1 As shown, the method includes the following steps:
[0047] 1) Set the junction temperature and junction temperature difference of the IGBT module under the accelerated test, and calculate the power cycle cut-off number of the IGBT module under the accelerated test according to the cut-off times of the IGBT module power cycle in the conventional test and the junction temperature and the junction temperature difference of the IGBT module in the conventional test;
[0048] 2) Select the sample of the motor controller to be tested, and perform the power cycle test on the IGBT module of the motor controller to be tested according to the junction temperature and junction temperature di...
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The invention provides a method and device for detecting the accelerated life of motor controllers. According to the method, an IGBT module having the greatest influence on the life of a motor controller is selected as a test factor, and a power cycle acceleration test is continuously carried out on the IGBT module in an acceleration test time so as to judge the service life of the motor controller; and verification is carried out determine whether a test sample of the motor controller is invalid or not after the acceleration test is finished so as to further judge whether the motor controllermeets an original design life requirement or not, and obtain the actual service life of the motor controller at the same time, thereby facilitating the related personnel to know the service life of the motor controller and repair the motor controller in time. The method for detecting the accelerated life of the motor controllers is capable of finding the problems affecting the reliability of themotor controllers in advance, is beneficial for improving the reliability of the motor controllers, and is capable of greatly shortening the test period and reducing the test cost when being comparedwith the conventional test.
Description
technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a method and device for detecting the accelerated life of a motor controller. Background technique [0002] New energy vehicles have the advantages of energy saving and environmental protection, and are becoming a hot spot in the research and development of new-generation vehicles. In recent years, electric vehicle technology has made significant progress. In the process of electric vehicle industrialization, its reliability has become the focus of attention of enterprises and customers. The key component that affects the reliability of new energy vehicles is the motor controller. The main function of the motor controller is to control the drive motor to provide power for the vehicle, and to provide braking function when the vehicle is braking, so as to recycle the braking energy. The working state of the motor controller directly affects the power output...
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IPC IPC(8): G05B23/02
CPCG05B23/0205
Inventor 张广利纪秉男张洪建韩守亮韩光辉靳超王志中
Owner ZHENGZHOU YUTONG BUS CO LTD