Abstract
In this paper, a cost-effective switched reluctance motor (SRM) for high-speed applications is proposed. First, SRM is widely known to have relatively low manufacturing costs because of its simplistic design and structure. Generally, SRM with lower phase numbers is used for high-speed application and thus a 2-phase SRM is selected in this paper. Some modifications are made to improve its performance while maintaining its simplistic design. Next, the shared-switch converter is selected to reduce the number of power switches to lower the drive cost. Finally, three Hall-effect sensors are adopted to detect the rotor position which can further reduce the cost and make the system compact. However, the combination of these three strategies creates a current demagnetization problem and high current overshoot. To solve this, a demagnetization dead-time is introduced. Experiments were performed at 18,000 RPM to verify the proposed idea, and it is shown that the performance is similar compared with that of the conventional method.
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