Why parameterized MOSFETs does not show response

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Hassan Ali
Hassan Ali 2025-1-21
回答： Sabin 2025-1-22
Hey,
I have an EV model where velocity is controlled via PMSM FOC blockset and when using ideal converter, the model is correctly following the reference speed and generating torque as expected and even when I put MOSFET (Ideal Switching), the model response is as expected, however, when I parameterized the same MOSFETs using preparameterized MOSFET or even I do the parameterizaton on my own using N-Channel MOSFET using datasheet, the response is 0.
I have done the tuning via trial and error and even tried to change the gains to see even some response.
I am attaching the Model here, any expert in this modelling can have look and guide on the issue.
  1 个评论
Rahul Choudhary
Rahul Choudhary 2025-1-21
Before proceeding with further debugging, it's crucial to verify that the magnitude of the gate pulse exceeds the threshold voltage of the MOSFET. For instance, if the gate pulse toggles between 0V and 1V, and the MOSFET's threshold voltage is 3.6V, the MOSFET will not turn on, resulting in zero output.

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采纳的回答

Sabin
Sabin 2025-1-22
In this instance the problem is the threshold voltage. The gate signals coming from the controller are 0 or 1 but the threshold voltage in the MOSFET blocks is 3.2 V. Multiply G from the controller by 5 using a gain block and it will work.

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