Power supply apparatus of home appliance
AssigneeSamsung Electronics Co., Ltd.
InventorsJong Hun Won, Tae Hoon Lim
Life of this patent
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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.
Claims13
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;
- a load switch connected to an output of the SMPS to switch the DC voltage from the SMPS;
- and
- a back electromotive force protection diode connected between a smoothing capacitor of the first rectifier and a smoothing capacitor of the second rectifier, and
- wherein the back electromotive force protection diode is configured to bypass a back electromotive force generated in the motor.
A power supply apparatus, comprising:
- 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 connected between a smoothing capacitor of the first rectifier and a smoothing capacitor of the second rectifier to bypass a back electromotive force generated in the motor.
Dependencies are inferred from the claim text.