Servo-motor driving method

Details Servo-motor driving method Servo-motor driving method

1998-10-01

2000-01-04

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Plural, diverse conditions or with time-delay means

318459, 318650, H02P 5402

Patent

active

060113707

ABSTRACT:
A conventional method for driving a servo-motor carried out control by means of a current feedback loop, using a current sensor and an A/D converter; therefore, the number of parts was great, cost reduction was difficult and it was difficult to avoid control errors caused by errors in the precision of the current sensor.
A method for driving a servo-motor of the present invention comprises detecting a power voltage (V) of a servo-motor (4), controlling a voltage command (Vcmd) to a power converter (3) by numeric calculation using a detected value (Vcc) of this power voltage (V), and controlling power of a drive current (Iu, Iv, Iw).

REFERENCES:
patent: 3743911 (1973-07-01), Erler
patent: 4536689 (1985-08-01), Davidson
patent: 5132599 (1992-07-01), Kono et al.
patent: 5780989 (1998-07-01), Matsumoto

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