A Real-time Junction Temperature Calculation Method for Servo Drive Power Module
A servo driver and power module technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of lack of reliability, complex structure, etc., and achieve real-time calculation, simple calculation method, and simple and reliable calculation process of junction temperature Effect
Active Publication Date: 2021-11-23
苏州挚远电气科技有限公司
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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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[0041] The embodiment of the present invention discloses a real-time junction temperature calculation method of a servo driver power module, and its operation steps include the following:
[0042] S10), using the loss calculation module to calculate in real time the instantaneous turn-on loss, instantaneous turn-off loss and instantaneous conduction loss of the power module of the servo drive, and transmit the instantaneous turn-on loss, instantaneous turn-off loss and instantaneous conduction loss as output signals to loss selection module; S20), the gate state judging module judges the gate real-time state of the power module of the servo driver, and transmits the gate real-time state signal to the loss selection module; S30), the loss selection module selectively directs the gate according to the gate real-time state The cumulative loss module outputs the instantaneous turn-on loss, instantaneous turn-off loss and instantaneous conduction loss of the power module of the serv...
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The invention discloses a method for calculating the real-time junction temperature of a power module of a servo driver. The steps include: S10), real-time calculation by using a loss calculation module to obtain instantaneous turn-on loss, instantaneous turn-off loss and instantaneous conduction loss; S20), gate state The judging module judges the real-time state of the gate of the servo driver power module; S30), the loss selection module selectively outputs the instantaneous turn-on loss, instantaneous turn-off loss and instantaneous conduction loss of the servo driver power module to the cumulative loss module; S40), the cumulative loss module Accumulate and calculate all instantaneous losses in the target calculation cycle to obtain accumulated losses; S50), use the junction temperature calculation module to calculate the real-time junction temperature of the servo drive power module; the present invention not only realizes the real-time calculation of the junction temperature of the power module, but also the junction temperature The calculation process is simple and reliable, no additional hardware circuit is required, and the implementation cost is low, which has great significance in theoretical research and practical promotion in the application field of servo drive 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...
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IPC IPC(8): H02H7/122H02P27/08
CPCH02H7/1225H02P27/085
Inventor 胡虎曲树笋
Owner 苏州挚远电气科技有限公司