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Spatial Harmonic PMSM drive using SSN with ultra-stable high-impedance mode (R2017b+)
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Note that this demo requires eFPGAsim installed, for some shared files. (It does not require a working eFPGAsim license.)
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The topology of the PMSM motor used in this demo (JMAG model 028)
The theory of the JMAG Spatial Harmonic PMSM (SH-PMSM) model is explained in detail here[1]
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The Spatial Harmonic PMSM model is a phase-domain model with tables of differential inductance, total flux, and torque. The model notably includes the cogging torque.
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Spatial Harmonic PMSM working equations
The SH-PMSM Flux equations are updated according to the values of current amplitude, current angle (atan(Id/Iq), and rotor position. Notably, the flux is integrated along the slope of the differential inductance at each operating point.
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Incremental (or differential) inductance (SH slope) versus steady-state inductance (VDQ slope) at the operating point '0'
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Example of 3-D flux and torque tables
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Other JMAG models can be used and many examples are available at https://www.jmag-international.com/modellibrary. According to the chosen motor Back-EMF and speed, the model sources amplitude and angle must be adjusted to produce reasonable currents and torque.
References
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