| 摘要 |
There is disclosed a power supply system for a washing machine which has an automatic door opening/closing apparatus designed for automatically opening or closing a door, a washing machine driving unit for enabling the washing machine to perform the washing operation, and a control component for controlling the operation of the washing machine driving unit. The power supply system includes a step-down transformer which has a primary winding directly connected to a power source and secondary windings formed of a first and a second secondary windings so as to decrease an alternating-current (AC) voltage at a predetermined ratio; a first power supply unit connected to the first secondary winding of the step-down transformer, and converting a first decreased AC voltage into a first direct-current (DC) voltage that is supplied to the control unit; a second power supply unit connected to the second secondary winding of the step-down transformer, and converting a second decreased AC voltage into a second DC voltage that is supplied to a door/lamp driver; the door/lamp driver having an input terminal connected to the second power supply unit and output terminals respectively connected to a door motor and a lamp, which allows them to be activated; and a power switch connected between the power cord and the washing machine driving unit.
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