Line start permanent magnet motor: single-phase starting performance analysis

This paper presents a detailed quasi steady-state approach to different torque components (average and pulsating) for a single-phase capacitor-run permanent magnet motor. By employing average electromagnetic torque, and the expected envelope of the pulsating torque, an accurate prediction of starting torque components behaviour is made. The quasi steady-state analysis of the asynchronous performance of the single-phase capacitor-start, capacitor-run permanent magnet motor is realized through a combination of symmetrical components and d-q axes theory. The developed approach is valid for any m-phase AC motor - induction, synchronous reluctance or synchronous permanent magnet.