Patent ID: RE39109

Claim:
An inverter circuit connected to first and second terminals which are given a substantially-direct current, said inverter circuit supplying polyphase power, comprising: a plurality of switching elements on a first side, each including a first end connected to said first terminal, a second end and a regenerative current element provided between said first and second ends; a plurality of switching elements on a second side, each including a first end, a second end connected to said second terminal, a regenerative current element provided between said first and second ends thereof and a current detection terminal for detecting a current flowing therein; a resistive device developing a voltage drop by a sum of currents flowing in said second ends current detection terminals of said plurality of switching elements on said second side; and a driving circuit for controlling a driving operation on said plurality of switching elements on said second side on the basis of a comparison result between said voltage drop and a predetermined voltage, wherein said second ends of said plurality of switching elements on said first side and said first ends of said plurality of switching elements on said second side are connected to output said polyphase power.