| 摘要 |
<p>PURPOSE: To provide a small power supply, for drive of a magnetron, without making the frequency of an inverter circuit high by a method wherein a primary winding for a step-up transformer is constituted of a flat litz wire. CONSTITUTION: A primary winding 15 is constituted of a flat litz wire. Thereby, even when the primary winding 15 is constituted on a concentric circle, it does not collapse, and a small step-up transformer can be constituted. In addition, an opposite area between the primary winding 15 and a secondary winding 16 is made large, and the distance between the windings is made small. As a result, a coupling which is obtained directly between the windings is made large, a coupling which is obtained via a magnetic core 17 can be reduced, and magnetic saturation is not generated even when the magnetic core 17 which is smaller is used. As a result, the small step-up transformer can be provided, and a power supply for drive of a magnetron can be miniaturized.</p> |
