Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2011-08-30
2011-08-30
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C363S034000, C363S037000, C363S039000, C363S040000, C363S041000, C363S044000, C363S045000, C363S047000, C363S052000, C363S055000, C363S056010, C363S056020
Reexamination Certificate
active
08008886
ABSTRACT:
A power converter is provided with a rectifying circuit, an inverter circuit, and a common mode filter including a common mode choke coil and a capacitor. The switching frequency of a PWM rectifying circuit is set at three times the switching frequency of a PWM inverter. Alternatively, the resonance frequency of the common mode filter is set at twice the carrier frequency of the rectifying circuit or the PWM inverter circuit or more.
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Singh, et al. “Unity Power Factor Converter-Inventer Fed Vector Controlled Cage Motor Drive Without Mechanical Speed Sensor”; Industrial Electronics, Control, and Instrumentation, 1995; Proc. of the 1995 IEEE IECON 21st International Conference on Orlando, FL; Nov. 6-10, 1995; vol. 1; pp. 609-614; XP010154744.
Kawashima Reiji
Koyama Yoshitsugu
Birch Stewart Kolasch & Birch, LLP.
Daikin Industries Ltd.
Leykin Rita
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