Electricity: motive power systems – Positional servo systems – Frequency- or phase-modulated systems
Patent
1995-03-24
1996-09-24
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
Frequency- or phase-modulated systems
318479, 318599, 318600, G11B 1928
Patent
active
055594140
ABSTRACT:
A control unit of a direct-current motor used in a magnetic recording and reproducing device or the like, which generates a digital error signal by processing a rotational frequency signal (a rotational frequency signal and a rotational phase signal when necessary) detected from a motor to be controlled, and furthermore, obtains a digital correction signal by processing the value of the power source voltage and corrects the digital error signal using the correction signal to compensate power source voltage fluctuation.
REFERENCES:
patent: 4527102 (1985-07-01), Gotou
patent: 4772830 (1988-09-01), Kobari et al.
patent: 4855652 (1989-08-01), Yamashita et al.
Sony Semiconductor IC data book, 1989, pp. 338-339, 361-362, 376-377, Japan .
Abe Hiroya
Kaniwa Kouji
Minabe Kouji
Narita Yoshio
Nishijima Hideo
Hitachi , Ltd.
Ro Bentsu
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