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This paper presents the result of the two-dimensional finite element analysis on the effects of rotor pole arc variation and number of teeth per rotor pole with different teeth depths and stator excitation pattern on various performance parameters like cogging torque, developed torque, harmonic torques, torque ripple and phase inductance for an 6/8, three phase flux reversal motor. A novel excitation...
This paper presents a new equivalent circuit for the brushless doubly-fed machine (BDFM) which is suitable for the steady state studies of the machine and the BDFM for adjustable speed drive systems. Based on the fundamental equivalent circuit for the BDFM and the chain equivalent circuit, the new equivalent circuit is developed for the investigation of the BDFM harmonic influence. Simulation results...
Stator current spectral analysis techniques are usually used to detect rotational faults in induction motors. However, position-varying load torque oscillation at multiples of the rotational speed has exactly the same effect. Harmonics resulting from the load torque oscillation often obscure or even overwhelm the detection of rotor faults since the magnitudes of a load torque oscillation induced harmonics...
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