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Title: Sensorless control of induction machines at low and zero speed by using PWM harmonics for rotor-bar slotting detection
Authors: Raute, Reiko
Caruana, Cedric
Spiteri Staines, Cyril
Cilia, Joseph
Sumner, Mark
Asher, Greg M.
Keywords: Electric machinery, Induction
PWM power converters
Vector control
Electric machinery -- Alternating current -- Automatic control
Electric driving -- Automatic control
Issue Date: 2010
Publisher: Institute of Electrical and Electronics Engineers Inc.
Citation: Raute, R., Caruana, C., Staines, C. S., Cilia, J., Sumner, M., & Asher, G. M. (2010). Sensorless control of induction machines at low and zero speed by using PWM harmonics for rotor-bar slotting detection. IEEE Transactions on Industry Applications, 46(5), 1989-1998.
Abstract: This paper presents the use of the inherent high-frequency pulsewidth modulation (PWM) harmonics for sensorless control of ac machines. The amplitude and position of the PWM voltage harmonics cannot be controlled independently and are determined by the fundamental machine operation. However, they do form a high-frequency excitation and can provide information on saliencies within ac machines. This paper examines the feasibility of sensorless control based on extracting the rotor-bar slot position information for a cage induction machine using PWM harmonics. The position-signal demodulation and compensation schemes used are derived. Experimental results are provided for an off-the-shelf induction motor operating under sensorless current, speed, and position control, including zero excitation and zero speed.
Appears in Collections:Scholarly Works - FacEngIEPC

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