| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the motor speed controller used in a fan, so as to control a rotational speed in a temperature range changed by a thermistor and a simple external circuit, and easily control a conversion point of temperature when the fan is operated at a low speed. <P>SOLUTION: The motor speed controller includes a thermal sensor sensing an ambient temperature of the fan, a drive component driving the fan at a specific rotational speed based on the sensed temperature, and a control component electrically connected between the drive component and the thermal sensor to control first voltage of the thermal sensor to change the rotational speed of the fan and the temperature range, the thermal sensor is preferably the thermistor, the drive component includes a hole sensor and a driver IC. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
