Non Ideal MOSFET modelling

sanjayrajendran · December 4, 2018, 6:00pm

Hello !

Myself Sanjay, I wanted to model the MOSFET switching losses, and true, there is a part in the library (MOSFET with limited di/dt) but if I’m not mistaken, the MOSFET turn off depends on the load current and isn’t a single delay value ( the load current charges the output cap or output charge to be specific and that time is your voltage rise time. Is there any way to model this ?

Thanks !

tinivella · March 4, 2019, 4:46am

hi the most reliable way is to measure it with a double pulse tester like the one describe here:

https://www.wolfspeed.com/downloads/dl/file/id/150/product/0/sic_mosfet_double_pulse_fixture.pdf

and then plug in PLECS the switching losses table

Topic		Replies	Views
Switch-on behavior and switch-off behavior of Mosfet in Plecs off , turn-off , behavior , mosfet	1	2496	May 4, 2018
how can i model double pulse circuit in PLECS based SIC MOSFET? turn-off , thermal-model , wolfspeed	1	1414	September 6, 2018
Negative Turn on Loss for multiple values. Switching or conduction Loss Cropped. plecs-blockset , thermal-model , negative , switching-losses , plecs-standalone	1	831	April 30, 2020
Switching losses in partially soft-switching inverter losses , inverter , zvs , soft-switching , hard-switching	3	3535	August 6, 2018
How are switching and conduction losses calculated by the model if the waveforms are ideal? switching , losses , thermal-model , switching-losses , conduction-losses	13	4838	December 6, 2024

Non Ideal MOSFET modelling

Related topics