Electric motor drive device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11431271
APP PUB NO 20200252017A1
SERIAL NO

16631229

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An electric motor drive device includes: a wire connection switching unit; an inverter; a control device controlling the wire connection switching unit and the inverter; and an overcurrent protection circuit preventing current exceeding a predetermined value from continuously flowing through the electric motor. The overcurrent protection circuit includes: determination circuits each correlated one-to-one with any one of possible wire connection states of a stator winding and determining whether current flowing through the inverter is abnormal; a combining circuit combining determination results; and an invalidation circuit invalidating a determination process by one or more of the determination circuits, and causing the combining circuit to output a determination result by the determination circuit correlated with a selected wire connection state of the stator winding. When the determination result output from the combining circuit indicates an abnormal value of the current flowing through the inverter, the control device stops the inverter.

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First Claim

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Patent Owner(s)

  • MITSUBISHI ELECTRIC CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hatakeyama, Kazunori Tokyo, JP 97 523
Shizu, Keiichiro Tokyo, JP 15 18
Takayama, Hiroyuki Tokyo, JP 37 118

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