POWER SUPPLY APPARATUS OF HOME APPLIANCE
First Claim
1. A power supply apparatus of a home appliance, comprising:
- a power line to supply alternating current (AC) power from an AC power source;
first and second rectifiers, each of the first and second rectifiers rectifying the supplied AC power;
a main relay connected to an input of the first rectifier to switch the AC power to the first rectifier;
a switching mode power supply (SMPS) connected to an output of the second rectifier to generate a direct current (DC) voltage for driving the home appliance based on a rectified voltage from the second rectifier; and
a load switch connected to an output of the SMPS to switch the DC voltage from the SMPS.
1 Assignment
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Accused Products
Abstract
A power supply apparatus of a home appliance which meets standby power regulation of 0.5 watts using one SMPS. As compared with a general circuit which meets the standby power regulation using two or more SMPSs, it may be possible to curtail expenses required for addition of a separate standby only SMPS and miniaturize a PCB, resulting in a reduction in cost. Further, in a washing machine employing a motor, a circuit is provided to bypass a back EMF generated in the motor even if AC power is not supplied to the washing machine due to occurrence of a power failure or unplugging of the washing machine. Therefore, it may be possible to prevent a PCBA from being damaged due to the back EMF.
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Citations
20 Claims
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1. A power supply apparatus of a home appliance, comprising:
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a power line to supply alternating current (AC) power from an AC power source; first and second rectifiers, each of the first and second rectifiers rectifying the supplied AC power; a main relay connected to an input of the first rectifier to switch the AC power to the first rectifier; a switching mode power supply (SMPS) connected to an output of the second rectifier to generate a direct current (DC) voltage for driving the home appliance based on a rectified voltage from the second rectifier; and a load switch connected to an output of the SMPS to switch the DC voltage from the SMPS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A power supply apparatus of a home appliance comprising:
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a power line to supply alternating current (AC) power from an AC power source; third and fourth diodes, each of the third and fourth diodes rectifying the supplied AC power; a main relay connected to an input of the third diode to switch the AC power to the third diode; a switching mode power supply (SMPS) connected to an output of the fourth diode to generate a direct current (DC) voltage for driving the home appliance based on a rectified voltage from the fourth diode; and a load switch connected to an output of the SMPS to switch the DC voltage from the SMPS. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A power supply apparatus, comprising:
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first and second rectifiers, each of the first and second rectifiers rectifying supplied AC power; a switching mode power supply (SMPS) connected to an output of the second rectifier to generate a direct current (DC) voltage based on a rectified voltage from the second rectifier; an inverter connected to an output of the first rectifier to convert a rectified voltage from the first rectifier into a 3-phase AC voltage and supply the converted 3-phase AC voltage to a motor; and a back electromotive force protection diode to bypass a back electromotive force generated in the motor.
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Specification