I want to design the loss calculation model of three phase inverter and loss calculation of the motor using the FEM Parameterized PMSM

I am designing the three phase inverter having both the loss calculation of the inverter and motor.

I have used the Simulink examples

1.Loss Calculation in a Three-Phase 3-Level Inverter

2. https://www.mathworks.com/help/releases/R2021b/physmod/sps/ug/pmsm-with-thermal-model.html?searchHighlight=PMSM%20thermal&s_tid=doc_srchtitle#responsive_offcanvas

I have joined together both the models with the inverter model. Simulink model is attached

while simulating i am getting this error.

Error compiling Simscape network for model PMSM_MOSFET_2.

Caused by:

• Frequency and time simulation is not applicable because sinusoidal expressions are not used by any other equations and have been eliminated.
• Check variable intrm_sf_mf__2.
• Check variable intrm_sf_mf__3.

Simulink model is attached alongwith the m.file. Need support to run this model.

thanks

Answer 1

[Sabin]

For simulation with semiconductor switches you cannot use Frequency and time simulation. Frequency and time simulation mode speeds up simulation of systems with a single nominal frequency by letting you increase the maximum step size for variable solvers. This mode also lets you perform phasor analysis of such systems by using the blocks in the Periodic Operators sublibrary of the Physical Signals library.

You have to select time simulation in the solver configuration block.

[Kashif Habib]

Hello Professor,

After changing to time simulation, i have encountered this error given below:

An error occurred while running the simulation and the simulation was terminated

Caused by:

• ['PMSM_MOSFET_2/Solver Configuration']: At time 0.000300, one or more assertions are triggered. See causes for specific information.
• In divide, the denominator must be nonzero. The assertion comes from: Block path: PMSM_MOSFET_2/FEM-Parameterized PMSMAssert location: o (location information is protected)
• In divide, the denominator must be nonzero. The assertion comes from: Block path: PMSM_MOSFET_2/FEM-Parameterized PMSMAssert location: o (location information is protected)
• In divide, the denominator must be nonzero. The assertion comes from: Block path: PMSM_MOSFET_2/FEM-Parameterized PMSMAssert location: o (location information is protected)