Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2005-10-25
2005-10-25
Fletcher, Marlon T. (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S801000, C318S811000, C318S729000, C318S438000, C318S052000, C318S812000
Reexamination Certificate
active
06958589
ABSTRACT:
A reactor having a predetermined small capacity is connected to a rectifier, and a capacitor having a predetermined small capacity is connected between DC bus lines of the inverter. A PN voltage corrector calculates a ratio of the DC voltage detection value of the inverter obtained by the PN voltage detector to a predetermined DC voltage reference value of the inverter to thereby generate a PN voltage correction factor. A beat amount corrector calculates a fluctuation amount of the motor current from the motor current detection value obtained by the motor current detector and generates a reverse phase component of the motor current fluctuation amount. Thus, a small, light and low-cost inverter controller can be implemented.
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Inverter Drive Handbook, compiled by Editing Committee ofInverter Drive Handbook, 1995, Nikkan Kogyo Shimbun, Ltd., pp 661-711.
Kawaji Mitsuo
Matsushiro Hideo
Sugimoto Tomohiro
Fletcher Marlon T.
Miller Patrick
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