Controlling method of a motor state

Details Controlling method of a motor state Controlling method of a motor state

2006-10-24

2006-10-24

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Braking

Dynamic braking

C318S503000

Reexamination Certificate

active

07126297

ABSTRACT:
A controlling method of a motor state described herein detects the motor operation in a regeneration state or a motor state. The output frequency value of an AC motor drive is calculated and adjusted to stabilize the voltage of a DC bus such that over-voltage protection is avoided. Therefore, a stable load current is obtained and the time for slowing down the motor is shortened.

REFERENCES:
patent: 3593103 (1971-07-01), Chandler et al.
patent: 4767976 (1988-08-01), Mutoh et al.
patent: 4785225 (1988-11-01), Horie et al.
patent: 5247237 (1993-09-01), Koyama et al.
patent: 6690139 (2004-02-01), Seibel

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