Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-05-29
2011-12-13
Benson, Walter (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S805000, C318S400070, C361S023000, C361S030000, C363S034000, C363S056030
Reexamination Certificate
active
08076896
ABSTRACT:
An inverter controller comprising an AC motor as a load. A rectifying circuit converts AC power from an AC power source into DC power. A smoothing capacitor smoothens a DC voltage from the rectifying circuit. An inverter circuit converts DC power supplied via the smoothing capacitor into a desired frequency. A current detection circuit detects a output current of the inverter circuit. A voltage detection circuit detects a terminal voltage (Vpn) of the smoothing capacitor. A voltage command calculation circuit calculates a voltage command to the AC motor. A speed command calculation circuit calculates a speed command to be used when it is determined that the AC power source is in a power failure state or when the terminal voltage (Vpn) reaches a certain value.
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Nakai Masaki
Nonaka Kazuhiro
Yamamoto Yo-ichi
Benson Walter
Colon Santana Eduardo
Kabushiki Kaisha Yaskawa Denki
Sughrue & Mion, PLLC
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