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The paper discusses control algorithms for a multistage VSI-fed polyphase PMSM drive with nonsinusoidal back-EMF. FOC principle-related regulation of the motor currents and regulation of individual VSI currents described in both rotor-oriented and stationary reference frames are considered. Computer model-based evaluations of the current and torque spectrum have shown that regulation of the drive...
The paper presents a model of a permanent magnet motor with M sets of three phase stator windings energized from DC-DC and DC-AC converters and regulated by a control subsystem of the marine propulsion drive. The model is built up by decomposing the system into subsystems / sub-circuits which are coupled together via dependent voltage/current sources. The model takes into account the non-sinusoidal...
The paper presents a model of a poly-phase permanent magnet motor of the marine propulsion drive energized by multistage VSI. The model defines more precisely the non-sinusoidal waveform of back-EMF and its impact on the current distortion and electromagnetic torque ripples. The paper concludes by analyzing simulation results that have shown significant suppression of high order current harmonics...
In today's electrical drives, the use of more than three-phases to implement the electrical machine stator winding is a frequently adopted provision to enhance system power rating and fault tolerance. In VSI-fed electrical machines, multi-phase windings are adopted in both their symmetrical structures (with n equally distributed phases, supplied by a single n-phase inverter) and in their multiple...
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