Motor controller, motor system and method for controlling motor

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12155331
APP PUB NO 20230111291A1
SERIAL NO

17907299

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A method for energizing a motor with a rotor by turning on a different portion of all arms, for each energization pattern, among the arms of an inverter, is provided. The method includes generating a PWM signal, for each phase, with a duty cycle of a same value, the PWM signal having a first period length that is defined by a first period during which a portion of the arms is turned on with a first energization pattern, during an idle time of the rotor; a second period during which a portion of the arms is turned on with a second energization pattern, during the idle time; and a third period during which all upper arms or all lower arms, among the arms, are turned on with a third energization pattern, during the idle time. The method includes subtracting, from a first current magnitude or a second current magnitude, a magnitude that is half of a sum of the first current magnitude for a first phase flowing through a current detection unit, which is coupled to a DC side of the inverter, during the first period, and the second current magnitude for the first phase flowing through the current detection unit during the second period, thereby calculating an offset current magnitude for the first phase during the idle time.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
MINEBEA MITSUMI INCNAGANO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kimura, Toshiki Nagano, JP 17 122

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