Inverter apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9531305
APP PUB NO 20140239861A1
SERIAL NO

14192557

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An objective of the present invention is to improve current detection accuracy and to reduce noise of carrier frequency. A motor apparatus and a motor drive apparatus calculate motor currents Iu, Iv, and Iw using a DC bus current detected value Idc of an inverter and control a magnitude and a phase of an applied voltage of a motor to drive the motor. A carrier adjuster decreases a carrier frequency Fc of the inverter if a motor output is relatively larger and that increases the carrier frequency Fc of the inverter if the motor output is relatively smaller. A pulse shift adjuster shifts an interphase waveform of a PWM pulse according to the carrier frequency Fc.

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Patent Owner(s)

  • HITACHI AUTOMOTIVE SYSTEMS, LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ajima, Toshiyuki Tokyo, JP 56 612
Aoyagi, Shigehisa Tokyo, JP 37 299
Furukawa, Kimihisa Tokyo, JP 28 250
Goto, Daisuke Hitachinaka, JP 158 635
Kashima, Masaki Hitachinaka, JP 13 48
Yamaguchi, Tohma Hitachinaka, JP 24 393

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