| 摘要 |
<P>PROBLEM TO BE SOLVED: To minimize the rotational speed of a motor regardless of temperature, in case that a speed control signal is inputted into a motor speed control circuit so as to minimize the rotational speed of the motor. <P>SOLUTION: The motor speed control circuit includes a speed voltage circuit which outputs speed voltage geared to the rotational speed and the temperature, based on a speed signal geared to the rotational speed of the motor and a temperature signal geared to the temperature, a comparison circuit which compares the reference voltage geared to the target rotational speed of the motor with the speed voltage, and a driving circuit which drives the motor so as to conform the voltage level of the speed voltage to the voltage level of the reference voltage, based on the comparison results of the comparison circuit. <P>COPYRIGHT: (C)2009,JPO&INPIT |
