Permanent Magnet Reluctance Motors Research Articles

Noise Lowering for a Large Variable Speed Range Use Permanent Magnet Motor by Frequence Shift and Structural Response Evaluation of Electromagnetic Forces

According to electrical output up rating of a permanent magnet motor and request to operate for a large variable speed range, resonance between structural natural vibration and electromagnetic force inside the motor can take place and make noise. This paper describes the mechanism of a resonance between them and noise lowering procedure by frequency shift when they are applied to the reluctance torque largely employed new motor named Permanent magnet Reluctance Motor (PRM).

The Development of the Permanent Magnet Reluctance Motor for a Hybrid Electric Vehicle

The Development of the Permanent Magnet Reluctance Motor for a Hybrid Electric Vehicle

Development of Permanent Magnet Reluctance Motor Suitable for Variable-Speed Drive for Electric Vehicle

Development of Permanent Magnet Reluctance Motor Suitable for Variable-Speed Drive for Electric Vehicle

Characterization of coil faults in an axial flux variable reluctance PM motor

In recent years, variable reluctance (VR) and switch reluctance (SR) motors have been proposed for use in applications requiring a degree of fault tolerance. A range of topologies of brushless SR and VR permanent magnet (PM) motors are not susceptible to some types of faults, such as phase-to-phase shorts, and can often continue to function in the presence of other faults. In particular, coil winding faults in a single stator coil may have relatively little effect on motor performance, but may affect overall motor reliability, availability, and longevity. It is important to distinguish between, and characterize, various winding faults for maintenance and diagnostic purposes. These fault characterization and analysis results are a necessary first step in the process of motor fault detection and diagnosis for this motor topology. This paper examines rotor velocity damping due to stator winding turn-to-turn short faults in a fault-tolerant axial flux variable reluctance PM motor. In this type of motor, turn-to-turn shorts due to insulation failures have similar I-V characteristics to coil faults resulting from other problems, such as faulty maintenance or damage due to impact. In order to investigate the effects of such coil faults, a prototype axial flux variable reluctance PM motor was constructed. The motor was equipped with experimental fault simulation stator windings capable of simulating these and other types of stator winding faults. This paper will focus on two common types of winding faults and their effects on rotor velocity in this type of motor.

Characterization of Coil Faults in an Axial Flux Variable Reluctance PM Motor

In recent years, variable reluctance (VR) and switch reluctance (SR) motors have been proposed for use in applications requiring a degree of fault tolerance. A range of topologies of brushless SR and VR permanent magnet (PM) motors are not susceptible to some types of faults, such as phase-to-phase shorts, and can often continue to function in the presence of other faults. In particular, coil winding faults in a single stator coil may have relatively little effect on motor performance, but may affect overall motor reliability, availability, and longevity. It is important to distinguish between, and characterize, various winding faults for maintenance and diagnostic purposes. These fault characterization and analysis results are a necessary first step in the process of motor fault detection and diagnosis for this motor topology. This paper examines rotor velocity damping due to stator winding turn-to-turn short faults in a fault-tolerant axial flux variable reluctance PM motor. In this type of motor, turn-to-turn shorts due to insulation failures have similar I-V characteristics to coil faults resulting from other problems, such as faulty maintenance or damage due to impact. In order to investigate the effects of such coil faults, a prototype axial flux variable reluctance PM motor was constructed. The motor was equipped with experimental fault simulation stator windings capable of simulating these and other types of stator winding faults. This paper will focus on two common types of winding faults and their effects on rotor velocity in this type of motor.

Choice of parameters in the hybrid permanent-magnet synchronous motor

Hybrid permanent-magnet reluctance motors have to be designed with many performance parameters in mind. The configuration is not a simple one, and some parts of the magnetic circuit operate in the nonlinear regime. The effect of the choice of design dimensions is considered, and the effect on pull-out torque computed as some of the important paramenters are varied. It is seen that some design parameters have a major effect on performance, although others are much less critical.