| 摘要 |
PURPOSE: A cutoff circuit for leakage current in inverter washer is provided to improve product reliability by reducing a current leakage risk at a low price and to prevent short risk due to outside factors or defect on a part of a Y capacitor itself. CONSTITUTION: A cutoff circuit for leakage current in inverter washer comprises: an electromagnetic interruption reducing circuit including an auto off switch (A.F) forcibly supplying an input common power, a rushing current prevention section (11) preventing a rushing current by supplying a common power through a resistance at first and then supplying the power through an on/off switch, a noise coil (N.COIL) removing noise of the power supplied through the rushing current prevention section, a filtering section (12) filtering the noise-removed power through two Y capacitors connected in series, and a rectifying/smoothing section (13/14) rectifying/smoothing the filtered power into a direct current voltage; a photo coupler (16) detecting leakage and short of the Y capacitors generated in a contact point of the two Y capacitors by using voltage difference between both ends of the resistance; and a microcomputer (15) cutting off the auto off switch (A.F) to block common power supply when a specific voltage is inputted from the photo coupler. |
