Apparatus and method for controlling inverter

Electricity: motive power systems – Induction motor systems – Primary circuit control

Reexamination Certificate

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C318S632000, C318S803000

Reexamination Certificate

active

11430996

ABSTRACT:
An apparatus and method for controlling an inverter are disclosed to allow an inverter to provide a stable output voltage to a motor regardless of a change in a DC input voltage. A difference value between a reference voltage according to a predetermined rated voltage of a motor and a DC voltage of the inverter is obtained, a ratio of an output command frequency to a predetermined reference frequency is applied to the difference value to obtain a compensation output voltage value, a final compensation output voltage value is obtained by compensating the detected DC input voltage value with the compensation output voltage, and an output voltage of the final compensation output voltage value to the motor by the inverter. Thus, the stable output voltage of the inverter can be provided to the motor regardless of the change in the input voltage.

REFERENCES:
patent: 5825642 (1998-10-01), Ishii et al.
patent: 6456508 (2002-09-01), Namai et al.
patent: 6603280 (2003-08-01), Notohara et al.
patent: 2004/0124807 (2004-07-01), Nakata et al.
patent: 2004/0228150 (2004-11-01), Sato
patent: 2006/0119311 (2006-06-01), Lee

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