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Development of a Real-time Analytical System for Motor Performance Measurement

Article of Honda R&D Technical Review Vol.13 No.2

Summary

A method was devised for utilizing vector analysis to quantify inductance during switching, which is a major factor affecting such motor performances as maximum power and efficiency, and the appropriateness of this method was confirmed. The application of this method makes it possible to measure actual motor inductance during switching and to observe the magnetic saturation of the motor. By systematizing this analysis method, and representing measured values as a circle diagram, it is possible to evaluate motor operating conditions in real-time. This makes it possible for optimum motor control parameters, which are conventionally determined by analysis after testing, to be established during testing. This system reduces the overall manpower used in motor testing and data analysis by 30%. By incorporating the motor inductance value that is calculated with this method into the motor’s digital control flow, the torque response is enhanced.

Reference

(1) Morimoto, S., Takeda , Y., and Hirasa, T., Comparison of Output Characteristics according to Current Control for PM Brushless DC Motors, The Institute of Electrical Engineers of Japan: Semiconductor Power Conversion Research Conference Material, SPC-89-3 (1989)
(2) Dote, Y. and Kinoshita T., Brushless Motor Basics, and their Use, Tokyo, Sogo Electric Publishing, 1985, p. 244
(3) Morimoto, S., Takeda, Y., and Hirasa, T., PM Motor dq Equivalent Circuit Constant Measurement Method, The Institute of Electrical Engineers of Japan: Industrial Application Division Newsletter, No. 113, Vol. 11, p. 1330 – 1331 (1993)
(4) Sugimoto, H., Koyama, M., and Tamai, S., AC Servo System Theory and Actual Design, Tokyo, Sogo Electric Publishing, 1990, p. 217

Author (organization or company)

Yoshinari MURAYAMA(Tochigi R&D Center)、Hirofumi ATARASHI(Tochigi R&D Center)、Makoto KISHIDA(Tochigi R&D Center)、Kiyoshi ASAMI(Tochigi R&D Center)

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