Analysis of a single-phase induction machine with a shifted auxiliary winding

• Published in: IEEE transactions on energy conversion Vol. 11; no. 4; pp. 681 - 686
• Main Authors: Walls, T.A., Sudhoff, S.D.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.12.1996; Institute of Electrical and Electronics Engineers
• Subjects: A.c. Machines; Applied sciences; Capacitors; Computer simulation; Electrical engineering. Electrical power engineering; Electrical machines; Exact sciences and technology; Induction machines; Induction motors; Resonance; Rotors; Stator windings; Synchronous motors; Torque; Transfer functions; Frequency characteristic; Electric machine; Induction machine; Compressor; Permanent split capacitor motor; Single phase machine; Resonance; Torque speed characteristic; Electric motor; Transfer function; Asymmetric induction; Auxiliary winding machine
• ISSN: 0885-8969; 1558-0059
• DOI: 10.1109/60.556361

This paper extents the method of multiple reference frames to the analysis of asymmetrical induction motors with nonorthogonal stator windings, with particular emphasis on the permanent split capacitor (PSC) machine. The predictions of the method are verified by comparison to both experimental results and to results obtained using a machine variable computer simulation. Once verified, the method is used to derive the transfer function relating rotor speed to load torque disturbance, which is of particular interest when analyzing PSC machines driving compressor loads. It is shown that the transfer function exhibits a distinct resonant point, and that the magnitude of the resonant peak increases as the motor approaches synchronous speed. It is also shown that the magnitude of the resonant peak may be lowered by increasing rotational inertia or rotor resistance.