| 摘要 |
PURPOSE:To enable the characteristic of a motor to be used to maximum by changing a maximum allowable-voltage value according to the rotational frequency of the motor. CONSTITUTION:The rotational frequency of a reel motor is detected by rotation sensors 1a, 1b, and the input to a micro-computer 3 is provided. In the storage device 2 of the micro-computer 3, the maximum allowable-voltage value of the motor according to the rotational frequency of the motor is stored. When the motor is quickly fed in the driving mode, then the micro-computer 3 controls motor driving circuits 10a, 10b via D/A converters 15a, 15b and motor power- supply circuits 14a, 14b so that the voltage value of the motor cannot exceed the maximum allowable-voltage value. |
