Electricity: motive power systems – With signals – meters – recorders or testing devices
Reexamination Certificate
2004-12-28
2008-09-09
Nguyen, Long (Department: 4193)
Electricity: motive power systems
With signals, meters, recorders or testing devices
C318S800000, C318S801000, C318S807000, C318S700000
Reexamination Certificate
active
07423401
ABSTRACT:
In an apparatus measuring constants of an induction motor, an inverter converts an inputted voltage command signal into a single-phase AC power and feeds the single-phase AC power to the induction motor, and a currert detector detects a current of the single-phase AC power fed to the induction motor. An apparatus controller generates a voltage command signal corresponding to an AC voltage as applied to the induction motor and outputs the voltage command signal to the inverter and gerates the voltage command signal and controls the inverter to feed the single-phase AC power having a frequency selected in a range equal to or higher than 0.006 Hz and equal to or lower than 1.5 Hz to the induction motor. A constant calculation controller calculates constants of the induction motor based on the voltage and current of the single-phase AC power fed to the induction motor.
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Fukuta Masahiro
Kinpara Yoshihiko
Kobayashi Takahiko
Oonuma Takumi
Dinh Thai T
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Electric Building Techno-Service Co., Ltd.
Nguyen Long
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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