Switching transformer, switching power supply device comprising same, in-vehicle electric compressor comprising same, and method for manufacturing switching transformer

Abstract

There is provided a switching transformer capable of reducing only parasitic capacitance and reducing noise while maintaining the magnetic coupling of winding wires of the switching transformer. A switching transformer 15 includes a primary winding wire 13 on a low-voltage side, a secondary winding wire 14 on a high-voltage side, a bobbin 43 having a winding shaft portion 61 at the center around which the primary winding wire and the secondary winding wire are wound and a flange portion 62, and the core 46 having a middle leg portion 67 inserted into a through hole of the winding shaft portion 61 to insulate the low-voltage side from the high-voltage side. An air gap layer G is formed between the winding shaft portion 61 and the middle leg portion 67.

Dependencies are inferred from the claim text.