Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2009-01-15
2010-02-16
Masih, Karen (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S802000, C318S810000
Reexamination Certificate
active
07663337
ABSTRACT:
A frequency converter for outputting a power to drive a motor, having: an inverter unit for inverting a d.c. power to an a.c. power; a control unit for controlling the inverter unit; and a housing for supporting at least the inverter unit and control unit, wherein a rise time change unit is provided in the housing, the rise time change unit changes a rise time of a waveform of a voltage output from the inverter unit.
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Japanese Office Action issued in corresponding Japanese Patent Application No. 2004-196188, dated Aug. 18, 2009.
Matsumoto Osamu
Obata Kouji
Obata Takeshi
Saito Koichiro
Shimozono Tadahiro
Antonelli, Terry Stout & Kraus, LLP.
Hitachi Industrial Equipment System Co.
Masih Karen
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