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This paper presents a main flux oriented model of an induction machine which considers the saturation in both magnetizing and leakage inductances. The model is based on a virtual air gap. With this model it is possible to simulate the saturation characteristic and the cross-saturation effect. The validity of these results is proved with measurements on a test bench. A procedure is presented that shows...
A special permanent magnet synchronous motor for ship propulsion in the power range between 50 and 250 kW is presented. It is fed by a PWM-voltage source inverter with field oriented control. A motor feature is the very low stator inductance. It leads to low reactive power and high maximum torque, but on the other hand it produces large current ripples and therefore harmonic losses up to 10 % of the...
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 this paper some different control strategies, suitable for open-phase fault operation of seven-phase current regulated induction motor drives, are presented. These strategies, which are valid in steady-state as well as in transient operating conditions, are compared in terms of stator and rotor copper losses and torque pulsations. The comparison is carried out by means of an opportune mathematical...
This paper presents and analyzed short circuit failures for permanent magnet synchronous motor (PMSM). The study includes stated state and dynamic condition for experimental test. The stator current is analyzed by means of Zhao-Atlas-Marks distribution (ZAMD) and energy spectrum.
This work deals with the analysis of the high-harmonic contents on the PM flux-linkage and induced back-emf of a PM machine at no-load and with delta connected winding topology. The skewing effect on these unwanted high-harmonics is investigated for a continuously skewed and a discrete skewed rotor topology. The FE results show that the PM flux-linkage of the studied machine contains high harmonics...
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