IGBT junction temperature monitoring method, device and system
A monitoring device and junction temperature technology, applied in measurement devices, control systems, electrical devices, etc., can solve problems such as large and complex IGBT monitoring circuits, and achieve the effects of low cost, reduced complexity, and simplified monitoring circuit structure.
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[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0053] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. Aiming at the challenge of IGBT junction temperature monitoring pointed out above, the present invention proposes a converter-level IGBT junction temperature monitoring method based on bus voltage ringing. A large number of studies have shown that the drop rate of IGBT collector current ...
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