Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2005-02-01
2005-02-01
Nappi, Robert (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S800000, C318S254100
Reexamination Certificate
active
06850031
ABSTRACT:
The present invention provides a motor controller capable of driving a synchronous motor having no position sensor stably at high efficiency by carrying out simple control. In order to attain this purpose, a reactive current is obtained from a motor current and a rotation phase, an error voltage is obtained from the reactive current and the command value of the reactive current, thereby obtaining a motor applied voltage command value Va that is used to compensate for the V/f characteristic of the motor. Furthermore, the motor applied voltage command value Va is applied to an output command computing section, and computed with the rotation phase signal of a wave generation section, thereby obtaining a signal for PWM driving the switching devices of an inverter circuit.
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Arai Yasuhiro
Nakata Hideki
Ueda Mitsuo
Yoshioka Kaneharu
Akin Gump Strauss Hauer & Feld & LLP
Matsushita Electric - Industrial Co., Ltd.
McCloud Renata
Nappi Robert
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