| 摘要 |
PURPOSE:To correct the changes of the characteristics of revolution due to a secular change or the fluctuation of load or the like of a DC motor by a method wherein the DC motor is driven by pulses with a fixed period capable of adjusting pulse width. CONSTITUTION:Output from an AC power source 1 is wave-form shaped by means of a wave-form shaping circuit 2, and sent to a pulse generator 6. The pulse generator 6 generates pulses with a fixed period having width decided by means of a pulse width regulator 7, and the pulses are fed to a DC motor 8 through an amplifier 5. When secular changes are generated in the characteristics of the revolution or load or the like of the DC motor, pulse width is regulated by adjusting the pulse width regulator 7. |
