IGBT module health state monitoring method based on natural frequency of thermal network
A technology of natural frequency and health status, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve the effect of reducing cost and complexity of operation
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[0021] In this embodiment, the IGBT module health status monitoring method mainly includes the establishment of an equivalent Kaur thermal network model, the mapping relationship between the natural frequency of the thermal network and the parameters of each order in the thermal network model, and the effect of the natural frequency on the thermal fatigue aging of the IGBT module. The change law in the process and the extraction of the natural frequency, the present invention can not only monitor the solder layer of the IGBT module chip and the base solder layer at the same time, but also does not need to measure the power loss of the IGBT module, which reduces the cost of hardware and the complexity of operation.
[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] See figure 1 , which shows a method for monitoring the health status of an IGBT module based on the natur...
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