Rotation locking system of motor of fan
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United States of America Patent
Stats
-
Sep 19, 2023
Grant Date -
Feb 16, 2023
app pub date -
Nov 30, 2021
filing date -
Aug 16, 2021
priority date (Note) -
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Abstract
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.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- ANPEC ELECTRONICS CORPORATION
International Classification(s)
- [Classification Symbol]
- [Patents Count]
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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