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This paper compares the air gap field, magnetic radial force and vibration between SPM and IPM machines having 6-pole/54-slot winding topology together with the identical stator but different rotor topologies. A simplified analytical method is analyzed and its results are validate by Finite element method. It is shown that the vibration of the IPM is much higher than that in SPM when motor is in on-load...
To avoid inconvenience caused by shaft rotation and improve immunity to measurement noises, an elaborately designed scheme is proposed for parameter identification of induction motors. After analyzing the responses of a simple step-voltage test, a sequence of pseudorandom signals, customized to excite abundant dynamics in the featured frequency band of the motor, are injected into the stator in a...
Hybrid excitation permanent magnet machines (HEPMM) combines two kinds of excitation: permanent magnet (PM) and electrical excitation, to keep the advantages of PM machines and overcome the difficulty in regulating magnetic field at the same time. By now there are so many HEPMM schemes with different structure and principle have been presented that it is difficult for successors to follow and catch...
This paper deals with a 12-phase synchronous generator with open-circuit fault of diode rectifier. Considering all space harmonics of air-gap magnetic field and the changing circuit topology, the mathematical model of the system is established based on the multiloop theory of machine. A series of experiments have been conducted on a 4-kW 12-phase synchronous model machine. The acceptable agreement...
A new hybrid excitation permanent machine-doubly fed hybrid excitation permanent magnet synchronous machine without rotor winding is presented. The structure, mathematic model and operation principle of the machine are introduced. It is shown that excitation regulation can be realized by changing the current of stator control winding. The field control performance in the generator and motor operation...
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