Xiaoyuan Chen

Dynamic analysis of switched reluctance motor in two different control strategies based on three-phase bridge converter

In this paper, two kinds of control strategies applied to a switched reluctance motor (SRM) with 12/8 teeth configuration have been analyzed based on a three-phase bridge converter. The first strategy is that the three phase SRM windings have to be connected in delta, with a separate diode connected in series with each phase, which is possible to control the voltage and current of each phase independently. The second strategy is that the three-phase windings of SRM are star-connected, and two-phase excitation strategy is applied. Field-circuit coupled finite-element models of SRM are set up in case of two kinds of control strategies respectively. The dynamic performance of SRM is investigated with two different strategies. Compared with the traditional SRM drive based on the asymmetric half-bridge converter, the SRM drive systems proposed in this paper can achieve the similar performance with low cost.

Effects of rotor eccentric displacements on performance of bearingless switched reluctance motors

This paper investigates effects of rotor eccentric radial displacements on magnetic field distribution, winding inductances, radial force and torque of BSRM. Magnetic field distributions of BSRM with different displacements of rotor eccentricity are calculated by 2-D finite element analysis. Then inductances of main and radial force windings, radial force and torque can be obtained, respectively. The calculated results testify that winding inductances, radial force and torque of the BSRM will have a great change because of the radial eccentricity. Inductances of main and radial force windings increase with augment of rotor eccentricity. Radial force and torque are the increasing functions of radial eccentric displacements.

Fault tolerant switched reluctance machine for fuel pump drive in aircraft

As switched reluctance motors (SRM) generally offer a simple and robust design, they are very suitable for an aircraft main engine fuel pump drive which needs to be actuated by fault tolerant drives. Based on analytical comparison the merits and demerits of some different machine topologies including redundancies, a six phase 12/8 fault-tolerant SRM is proposed and designed for fuel pump drive application. The finite element model based on field-circuit coupling is established, results indicate that this machine meets the needs of demanding fuel pump drive system in aerospace environments.