Reduced voltage soft starter apparatus and methods using current-controlled transitions

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United States of America Patent

PATENT NO 11128240
SERIAL NO

16992912

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Abstract

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A motor starter includes a plurality of semiconductor switches configured to couple respective phases of an AC power source to respective phases of a motor and a control circuit configured to configured to selectively operate the semiconductor switches to gradually increase a voltage applied to the motor, to determine root mean square (RMS) current values of a current of the motor as the voltage increases, and to cause the semiconductor switches to apply a full voltage or a more steeply ramping voltage to the motor responsive to the RMS current values meeting a criterion.

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Patent Owner(s)

Patent OwnerAddress
EATON INTELLIGENT POWER LIMITED30 PEMBROKE ROAD DUBLIN 4 D04 Y0C2

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Farr, Thomas A Candler, US 11 16
Simms, Stan Rex Arden, US 11 17
Tang, Hanning Asheville, US 5 3
Wells, Benjamin Stewart Arden, US 7 17

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