MOTOR DRIVE VOLTAGE CONTROL DEVICE AND METHOD FOR CONTROLLING MOTOR DRIVE VOLTAGE

WIPO Patent Application WO/2014/097959

A1

[Problem] To suppress a decline in the control accuracy of an applied voltage associated with an increase in quantum noise, and increase the control accuracy of a motor speed. [Solution] When forming a drive voltage signal supplied to a motor from a drive command signal, a motor drive voltage control device reduces the gradation level and performs noise-shaping modulation before performing PWM modulation. Reducing the gradation level sets the degree of gradation of the drive voltage signal within the resolution range of the PWM modulation, and thus PWM modulation can be performed even when the drive voltage signal has high frequency. Noise shaping modulation reduces the level of quantum noise near the low frequency band by biasing the quantum noise due to digitization, included in the drive voltage signal, toward the high frequency band. Of modulation signals with the reduced-gradation level, components near the high frequency band are cut, while components near the low frequency band are used, to suppress quantum noise and control the drive voltage applied to the motor with high accuracy.

JP6645994	A machine learning device for learning the optimization of gain, an electric motor control device equipped with the machine learning device, and a machine learning method.
JP2938844	Description: Speed and Position Signal Generator

URATA JYUNICHI (JP)
INABA MASAYUKI (JP)

PCT/JP2013/083313

June 26, 2014

December 12, 2013

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SCHAFT INC (JP)

H02P29/00; H03M3/02

JP2001037282A	2001-02-09
JP2009044321A	2009-02-26
JPH05344780A	1993-12-24
JPH05344780A	1993-12-24
JP2003124812A	2003-04-25

See also references of EP 2937991A4

YAMASAKI, Yukuzo et al. (JP)
Yukuzo Yamazaki (JP)

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