Discretizing the PWM Motor Drive: example in the help of Matlab (Simulink) not working

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Maria
Maria 2018-6-8
回答： Sabin 2025-7-2
Hello, I was running the example for PWM Motor Drive as provided in the Matlab help page here https://se.mathworks.com/help/physmod/sps/powersys/ug/simulating-variable-speed-motor-control.html. I wanted to simulate it at discrete time, so I followed the instructions as per section "Discretizing the PWM Motor Drive". However, I get the error "The "FixedStepDiscrete" solver cannot be used to simulate block diagram 'motor_drive_matlabexample' because it contains continuous states".
Can someone tell me what I am doing wrong? I attach the Simulink file.

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回答（1 个）

Sabin
Sabin 2025-7-2
Fourier1 block has sample time 0 which means is continuous time. Therefore, it would not be possible to use FixedStepDiscrete. The options are: 1) Use fixed step solver with ode3, ode14x, ode1be or any other solver that suppoorts continuous states; or 2) Change the sample time in the Fourier1 block.

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