Electricity: motive power systems – Braking – Dynamic braking
Reexamination Certificate
2008-01-01
2008-01-01
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Braking
Dynamic braking
C318S139000
Reexamination Certificate
active
11354908
ABSTRACT:
A motor is driven with variable frequency AC power converted from DC power, and an AC output power from the motor is converted to DC. In the conversion, an electromotive force regenerated by the motor is consumed by a plurality of resistors. When the consumption of the electromotive force is impeded in any of systems including any of the plurality of resistors, the electromotive force is consumed by the systems including the remaining resistors. Even if a system including any of the plurality of resistors fails, the electromotive force can by consumed by the other systems including the remaining resistors, thus providing a reliable rheostatic brake.
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Imaie Kazuhiro
Kiyofuji Yasuhiro
Shimada Keizo
Sugawara Naoshi
Yagyu Takashi
Antonelli, Terry, Stout & Krauss, LLP.
Hitachi Construction Machinery Co. Ltd.
Ro Bentsu
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