| 摘要 |
PURPOSE:To ideally control a current by providing compensating means for compensating the variation in the input voltage of an inverter at the input side of a PWM wave generator, thereby preferably compensating a counterelectromotive force irrespective of the input voltage. CONSTITUTION:An AC input is applied through a power reactor 2 and a power inverter 3 to an AC motor 4. The output of the inverter 3 is inputted through a transformer 5 and a filter 8 to an adder, which adds the output to the output of a current regulator 7. The output of the adder and the output of a voltage detector 10 which detects the output of the reactor 2 are inputted to a divider 9. The output of the divider 9 is applied to a PWM wave generator 6, which outputs a PWM waveform for controlling the inverter 3. |
