Control method and device for AC motor

Details Control method and device for AC motor Control method and device for AC motor

1990-09-13

1993-02-02

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318801, H02P 540

Patent

active

051840570

ABSTRACT:
In a control method and device for an AC motor, when transforming output power of a converter to AC power by an inverter and controlling the AC motor with the AC power, a source current value is determined from the value of an electric variable in the input or output side of the inverter, and the converter is controlled in accordance with the source current value. This makes the source current free from an influence of ripple components. Accordingly, even when the load of the AC motor is fluctuated abruptly, the required AC power can be applied to the converter so as to follow such fluctuations.

REFERENCES:
patent: 3896398 (1975-07-01), Coderer
patent: 4328454 (1982-05-01), Okuyama et al.
patent: 4419615 (1983-12-01), Muto et al.
patent: 4447788 (1984-05-01), Mundt et al.
patent: 4984147 (1991-01-01), Araki

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