Real-time junction temperature calculation method of servo driver power module

Abstract

The invention discloses a real-time junction temperature calculation method of a servo driver power module. The method comprises the following steps: S10) adopting a loss calculation module to calculate in real time to obtain instantaneous turn-on loss, instantaneous turn-off loss and instantaneous turn-on loss; S20) x judging the gate pole real-time state of the servo driver power module by a gas-insulated metal-enclosed power transmission line; S30) selectively outputting, by a loss selection module, instantaneous turn-on loss, instantaneous turn-off loss and instantaneous turn-on loss of the servo driver power module to the accumulated loss module; S40) accumulating and calculating all instantaneous losses in the target calculation period by an accumulated loss module to obtain accumulated losses; and S50) calculating real-time junction temperature of the power module of the servo driver by adopting a junction temperature calculation module. According to the method, real-time calculation of the junction temperature of the power module is achieved, the junction temperature calculation process is simple and reliable, no extra hardware circuit needs to be arranged, the implementation cost is low, and the method has great theoretical research and actual popularization significance in the application field of servo driving systems.

Description

technical field [0001] The invention relates to the control technology of the servo driver, in particular to a method for calculating the real-time junction temperature of the power module of the servo driver. Background technique [0002] Common knowledge in the field of servo drive control is that the power module of the servo drive is one of the core components of the servo drive. Reliability and life. Therefore, in the current technology, realizing the online calculation of the junction temperature of the power module of the servo drive, and then using the loss to settle the junction temperature to determine whether the power module is normal or needs to be derated is the key to ensure the service life of the power module. Key technical means. However, in the current technology, in order to realize the real-time calculation of the junction temperature of the power module of the servo drive, it is necessary to add an additional dedicated hardware device, which has a comp...

AI Technical Summary

Problems solved by technology

However, in the current technology, in order to realize the real-time junction temperature calculation of the power module of the servo drive, it is necessary to add an additional special hardware device, which has a complicated structure and lacks reliability.

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