Patent ID: 7622870

Claim:
An inverter apparatus for converting an input voltage to an AC driving voltage and supplying the AC driving voltage to a plurality of loads, comprising: a transformer including a primary winding and a secondary winding; a switching circuit including a plurality of transistors connected to the primary winding of the transformer, the switching circuit alternately applying the input voltage and a fixed voltage lower than the input voltage to the primary winding of the transformer according to turning-on and turning-off of each of the transistors; a plurality of capacitors provided to the respective loads, one ends of the capacitors being commonly connected to the secondary winding of the transformer, and the other ends thereof being connected to the respective loads; and a control circuit structured to monitor a current flowing through the plurality of loads, and structured to perform feedback control of the turning-on and turning-off states of a plurality of the transistors of the switching circuit to adjust supply of switching power to the primary winding of the transformer, wherein: the plurality of loads comprises: a first load having one end thereof connected to one of the plurality of capacitors and the other end connected to the control circuit; and a plurality of second loads each having one end thereof connected to one of the plurality of capacitors and the other end thereof connected to the ground; wherein the control circuit monitors a current flowing in the first load of the plurality of loads.