| 摘要 |
PURPOSE:To simply confirm the control state of a PWM inverter by integrating PWM controlled output voltage by an integrator to form a current signal equivalent to the output current of the PWM inverter and supplying it to the inverter. CONSTITUTION:The output voltage of a PWM inverter is supplied to a transformer 11, and the output voltage is integrated by an integrator 13. The signal obtained from this result becomes equivalent to the line currents. It is arbitrarily divided by a resistor 16 and a variable resistor 15, and supplied to a current composite unit 8 instead of the output of the current detector 4 of the PWM inverter. A current command applied by a controller 10 and the output signal of an equivalent load device are compared by a hysteresis comparator 9 to form a PWM signal. |
