关键词: 空心杯感应电动机, 单位功率因数, 开绕组, 浮动桥逆变器

Abstract: Drag-cup induction motor is suited for high-speed areas such as turbo molecular pump, because of its simple and robust structure, small rotor inertia and easy integration with drive system. The drag-cup motor has large effective air gap length, resulting in lower output power and poorer power factor as compared with cage-rotor type. The reactive power of drag-cup induction motor was compensated by the floating capacitor bridge, while the unity power factor of source inverter could be achieved. The drag-cup motor model was built in ANSYS electromagnetic simulation software and the effectiveness of the proposed method was verified.

Key words: drag-cup induction motor, unit power factor, open-ended winding, floating capacitor bridge