| 摘要 |
PURPOSE:To reduce the size of a driving device for an inverter motor by obtaining two clock signals for controlling the switching transistor of the inverter from a single voltage variable controlled frequency oscillator and a polarity inverter. CONSTITUTION:A clock signal oscillator which controls the switching transistor of an inverter for driving a motor is formed of a single voltage variable controlled frequency oscillator 30 and a polarity inverter 31. The clock signals of the frequency determined by resistors R4, R5 and a capacitor C5 are generated from the oscillator, and are inverted in polarity by the inverter 31 and are used as the first clock signal, and the non-inverted signals are used as the second clock signal, thereby controlling the respective transistors. Accordingly, the pausing times of the transistors which operate complementarily can be varied arbitrarily by the R4, R5, C5, and the influence of the external noise and the size can be reduced. |
