| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power supply device, in which full length of an insulator of a high-voltage fuse is shortened and which can be easily assembled in a microwave oven for installation, by connecting a high-voltage fuse to a grounding end of a secondary coil of a high-voltage transformer. SOLUTION: An output end of a high-voltage transformer 10 has a high- voltage capacitor HC for charging and discharging high-voltage current, and one side of a high-voltage fuse 30 is connected to a grounding end of a secondary coil T2 of the high-voltage transformer 10. With this structure, an electrical potential difference between the high-voltage fuse 30 and the grounding surface becomes to 20 V or less at the time of normal operation of a microwave oven, and in the case where the high-voltage fuse 30 is disconnected, high voltage is applied to one end of the high-voltage fuse 30, but the other end thereof is grounded so as to stop the application of voltage. Consequently, since the insulation is performed by grounding only one part of the high-voltage fuse 30, which is connected to the high-voltage transformer 10 among the structural parts of the fuse 30, full length of the high-voltage fuse 30 can be shortened.</p> |
