| 摘要 |
PURPOSE: To prevent the output waveform of an inverter from losing its shape even when a rectifier is loaded. CONSTITUTION: A DC/AC inverter 1 is installed. Current transformers 11, 13, a voltage transformer 12, a reactor 14 and a capacitor 15 are installed at its output circuit. A feedback signal from the current transformer 11 is input to an adder 5; a feedback signal from the voltage transformer 12 is input to an adder 9; the detection signal of the current transformer 13 is input to an adder 7; and a sine-wave-voltage instruction signal 10 is applied to the adder 9. Thereby, the sine-wave-voltage instruction signal 10 as the feedback compensation signal of an output voltage is applied to a control signal which is based on a current instruction signal and on a current feedback signal, and it is input to a PWM-inverter-drive-signal circuit 2 to control the DC/AC inverter 1. |
