A New Low-Cost Hybrid Switched Reluctance Motor for Adjustable-Speed Pump Applications

This paper presents a new low-cost, hybrid SR motor intended for use in adjustable-speed pump drive systems. This motor is a single-phase motor, driven by a unipolar converter. This motor uses both the reluctance torque and the permanent magnet interaction torque. Compared with normal single-phase SR motors, it has an increased torque density. The cogging torque is properly used in this motor for reducing the torque ripple. It is demonstrated that such a motor drive system can be a suitable candidate to advantageously compete with the existing motor drive systems for low-cost applications. Finite element models are used to analyze and predict the motor´s performance. The proposed motor drive system has been fabricated and its performance tested in the laboratory. These experimental results are also presented