Electricity: motive power systems – Induction motor systems – Braking
Reexamination Certificate
2005-07-01
2009-11-03
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Induction motor systems
Braking
C318S800000, C318S801000, C318S811000
Reexamination Certificate
active
07612518
ABSTRACT:
There is provided an inverter capable of reducing a speed in a short period of time without generating an overcurrent even in a case of an alternating current motor which is easy to be saturated magnetically.A frequency of driving a motor is calculated by using a detecting value constituted by passing a direct current bus line voltage through a first filter portion, a voltage command is corrected by using a detecting value passing through a second filter portion, by making a time constant of the second filter portion larger than a time constant of the first filter portion in reducing a speed, the motor is brought into an overexcited state and loss is brought about in the motor.
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Hiramatsu Kazuhiko
Iura Hideaki
Kabushiki Kaisha Yaskawa Denki
Paul Antony M
Ro Bentsu
Sughrue & Mion, PLLC
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