| 摘要 |
<P>PROBLEM TO BE SOLVED: To keep electric power supplied to a motor to be constant irrespective of an applied voltage to the motor in a motor controller which controls driving of the motor. <P>SOLUTION: The motor controller includes a current detecting means to detect a current flowing through the motor, and a variable voltage source to output a voltage corresponding to the applied voltage to the motor. A voltage difference is detected between a reference voltage generated using the voltage output from the variable voltage source and the voltage generated according to the current detected by the current detecting means, then a current corresponding to the voltage difference is supplied to the motor, by which the electric power applied to the motor is made constant irrespective of fluctuation of the applied voltage to the motor. <P>COPYRIGHT: (C)2007,JPO&INPIT |
