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The electric vehicles need high efficient torque control system. Therefore, this paper proposes the novel excitation interval control method. The excitation intervals are concentrated around the rotor position where the derivative of inductance becomes maximum values. The efficiency of proposed method is superior to the efficiency of conventional methods.
The authors proposed a high power and low vibration novel segment type switched reluctance motor (SRM), but it had a problem of large torque ripple. We also proposed the novel segment type SRM with a 2-steps slide or skew rotor to reduce the torque ripple. We produced the experimental machine and measured the characteristics. The average torque was decreased slightly in comparison with the non slide...
This paper presents a new approach to control the turn-off angle θoff used to excite the Switched Reluctance Motor (SRM) used in electric vehicles (EV). The controller selects the turn-off angle which will improve the performance of the electric drive system with turn-on angle constant. This control scheme consisting of classical current controller and speed controller depend on lookup table to choose...
In order to solve problems of taking traditional mechanical bearing to bear the shaft, a novel bearingless switched reluctance motor with hybrid stator poles is proposed in this paper. The rotor needs only one bearing for rotating and constraining the axial movement. The other end can move freely in the radial direction. But it is balanced with the radial force produced by the motor. The proposed...
This paper presents the modeling, simulation, and control of Switched Reluctance Motor (SRM) for high-speed applications. The model of SRM is built with help of three-dimensional relationship between excitation currents, rotor position and flux linkage. The relationship makes electromagnetic torque depends not only on the excitation currents but also on the rotor position. Therefore, it is difficult...
In this paper a torque compensation technique for switched reluctance motor (SRM) is proposed. The conventional torque control with a simple current control loop usually causes large torque ripples and affects the speed response and overall performance of the drive system. The proposed torque compensation method is based on a torque estimation technique using the inductance profile and squared value...
Due to the reluctant effect that exists between the stator and the rotor and its conception, the torque of switched reluctance motor (SRM) has a ripple waveform. Hence it is necessary to reduce these undulations, which are undesirable and harmful for a best fonctionnement of system. In order to minimize these undulations, we present in the follow paper the current hysteresis control of the SRM supplied...
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