Fan and speed control circuit thereof
AssigneeFoxconn Technology Co., Ltd.
InventorsCHING-BAI HWANG, HENG-SHENG LIN, RUNG-AN CHEN, PO-HSUAN KUO
Life of this patent
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Abstract
A fan includes a speed control circuit and a motor electrically connected with the speed control circuit. The speed control circuit includes an inputting circuit and a transforming circuit electrically connected with the inputting circuit. The inputting circuit supplies a constant current to the transforming circuit. The transforming circuit transforms the constant current to a fluctuating current and outputs the fluctuating current to the motor of the fan. The fluctuating current causes a rotation with a fluctuating speed to the motor of the fan.
Claims7
A speed control circuit for a motor of a fan comprising:
- an inputting circuit for generating a constant current;
- and
- a transforming circuit electrically connected to the inputting circuit to transform the constant current to a fluctuating current, the fluctuating current being adapted to be supplied to the motor to cause and maintain a rotation of the motor of the fan.
A fan comprising:
- a speed control circuit comprising an inputting circuit and a transforming circuit electrically connected with the inputting circuit;
- and
- a motor electrically connected with the transforming circuit;
- wherein the inputting circuit supplies a constant current to the transforming circuit, and the transforming circuit transforms the constant current to a fluctuating current and outputs the fluctuating current to the motor of the fan.
Dependencies are inferred from the claim text.