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Rotor Speed Detection Method for an Ultra High Speed Induction Motor Utilizing Slot Harmonics
Technical Paper
2007-01-0410
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Recently many automotive components have become electrified and an ultra high speed drive (over 150,000 rpm) is now expected in applications such as a turbocharger. In these applications, a robust induction motor (IM) with a rectangular wave drive is generally adopted. A speed sensor is required to control the IM, but it can cause problems concerning cost, space and reliability. Thus, a sensorless speed detection method is required. Because general sensorless methods based on a sinusoidal wave drive are not applicable to a rectangular wave drive, we propose a method utilizing slot harmonics that are generated by the mechanical structure of the IM. Signal-to-noise (S/N) ratio of slot harmonics is very small, and hence we suggest three techniques: a detection circuit, a digital filter with a variable passband, and a detection method to restart the motor while rotating.
The proposed method was evaluated with a test vehicle, and the results show that the rotor speed of IM can be detected up to 180,000 rpm with error less than 0.5%.
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Authors
Citation
Masuzawa, T., Isogai, N., and Fujitsuna, M., "Rotor Speed Detection Method for an Ultra High Speed Induction Motor Utilizing Slot Harmonics," SAE Technical Paper 2007-01-0410, 2007, https://doi.org/10.4271/2007-01-0410.Also In
SAE 2007 Transactions Journal of Passenger Cars: Electronic and Electrical Systems
Number: V116-7; Published: 2008-08-15
Number: V116-7; Published: 2008-08-15
References
- Bae B-H Sul S-K Lwon J-H Byeon J-S “Implementation of Sensorless Vector Control for Super-High-Speed PMSM of Turbo-Compressor,” IEEE Trans. Ind. Appl. 39 6 811 2003
- Ishida M. Iwata K. “A New Slip Frequency Detector of an Induction Motor Utilizing Rotor Slot Harmonics,” IEEE Trans. Ind. Appl. IA-20 3 575 582 May June 1984