Rotation locking system of motor of fan

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11761450
APP PUB NO 20230049456A1
SERIAL NO

17539103

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A rotation locking system of a motor of a fan is provided. A closed-loop control circuit outputs an initial duty cycle signal according to a current rotational speed and a target rotational speed. A driver circuit outputs a driving signal to the motor to drive the motor to rotate according to the initial duty cycle signal. A lookup table arithmetic circuit looks up, from a lookup table, two reference duty cycles correspond to two reference rotational speeds that are respectively equal to the current rotational speed and the target rotational speed. The lookup table arithmetic circuit calculates a difference between the two reference duty cycles. A speed feedback control circuit compensates the initial duty cycle signal according to the difference to output a final duty cycle signal to the driver circuit. The driver circuit drives the motor to rotate according to the final duty cycle signal.

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Patent Owner(s)

  • ANPEC ELECTRONICS CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Kun-Min Hsinchu, TW 61 805
Hsu, Che-Ming Hsinchu, TW 51 531

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