LOAD COMMUTATION INVERTER ARRANGEMENT

PROBLEM TO BE SOLVED: To provide a load commutation inverter arrangement which can operate stably without overvoltages, even if a load impedance changes rapidly, and so on. SOLUTION: The inverter arrangement is composed of a forward converter 2 for converting alternating current into direct current, an inverter 4 for converting the direct current converted by this forward converter into alternating current and supplying it to a load coil, a control means 8 for controlling the forward converter, and a voltage detection means for detecting the output voltage of the inverter. The control means is provided with a first voltage controller 83 for controlling the firing phase of the forward converter according to the difference between the detected voltage of the voltage detection means and a first reference voltage 81, and a second voltage controller 88 for calculating and amplifying the difference between the detected voltage of the voltage detection means and a second reference voltage 86, and adds the output of the second voltage controller to the output of the first voltage controller, when the detected voltage of the voltage detection means is larger than the second reference voltage. COPYRIGHT: (C)2006,JPO&NCIPI