| 摘要 |
PURPOSE:To unnecessitate a power factor detecting device by controlling an output voltage of a voltage-type inverter device so that the value of a DC current flowing to a reactor of a DC filter circuit of a voltage-type inverter circuit and the value of an output current are constant. CONSTITUTION:An AC input is converted into a direct current by a controlling rectifier device 1 and given to an inverter circuit 4 via a DC filter consisting of a smoothing reactor 2 and a smoothing capacitor 3, and a hysteresis motor 5 is driven by an output of the circuit 4. Outputs of an output current detecting CT7 and and a reactor current detecting DC CT are divided by a divider 11. The output of the divider 11 is compared with a reference value from a reference setter 12 by a subtractor 13 and inputted in an adder 17 via an amplifier 14 with limit, an integrator 15 and a Zener diode 16. In the adder 17, outputs of the integrator 15, an inverter output voltage detecting PT6 and a reference setter 18 and added, and based on the output of the adder, a voltage control circuit 19 controls the controlling rectifier device 1. |
