发明申请
US20100141184A1 FAN AND SPEED CONTROL CIRCUIT THEREOF 审中-公开
风扇和速度控制电路

FAN AND SPEED CONTROL CIRCUIT THEREOF
摘要:
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.
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