Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-02-06
2007-02-06
Duda, Rina (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
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.
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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
Duda Rina
Greenblum & Bernstein P.L.C.
LS Industrial Systems Co., Ltd.
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