Drive circuit and control board

Abstract

A driving circuit according to the present invention controls driving of a switching element by outputting a drive signal to the switching element. The driving circuit is provided with an air core transformer having a plurality of primary windings and a secondary winding magnetically coupled to each of the plurality of primary windings. The air core transformer is such that AC signals are input into each of the plurality of primary windings. The plurality of primary windings include a first primary winding and a second primary winding. A phase difference exists between the AC signal that is input into the first primary winding and the AC signal that is input into the second primary winding.