| 摘要 |
PURPOSE:To perform speed control from zero speed to maximum rotation through a single speed control circuit by limiting the low level of output pulse from an F/V pulse generating circuit to a predetermined level and controlling a motor according to an external speed command. CONSTITUTION:An F/V pulse generating circuit 24 converts the rotation of a motor into a voltage which is then compared with a speed command voltage. In other words, a speed command voltage 68-F/V conversion output 62 is operated and converted through an amplification phase compensating circuit 63 into a voltage to be applied onto the motor which is finally rotated with a rotation specified by the speed command voltage 68. When the speed command voltage 68 is set lower than the low level of the F/V converted output 62, the motor is stopped positively. When the speed command voltage 68 is varied above the low level of the F/V pulse, rotation of the motor can be controlled linearly from 0 to the maximum rotation. |
