AC-DC power supply device and switching mode power supply device
AssigneeBoltier R&D
InventorHun Yong Choe
Life of this patent
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Abstract
Provided is an alternating current (AC) and direct current (DC) power supply device in which normal power and power of a solar cell is used to supply not only AC power but also DC power, particularly, power of a solar cell is first supplied as DC power or is charged in a battery, and after battery charging, residual power is converted to AC power via an inverter so as to replace normal AC power or to transmit AC power to the outside. Accordingly, an SMPS power supply method in which AC and DC power are supplied at the same time may be provided, and moreover, power of a solar cell may be effectively used.
Claims10
An alternating current (AC)-direct current (DC) switching mode power supply (SMPS) device comprising:
- a SMPS device for receiving normal AC power from a hot wire, a neutral wire, and a ground wire to connect the normal AC power to an AC output terminal of a battery via a ground terminal;
- an electromagnetic interference (EMI) circuit for converting AC power applied to the AC output terminal of the battery to DC power;
- a power factor correction (PFC) circuit for applying the applied DC power to drains of switching devices via a low pass filter;
- a SMPS circuit for applying DC power to a drain of one of the switching devices and oscillating an integrated circuit to trigger gates of the switching devices, wherein the switching devices are serially connected to switch DC power applied to the drains of the switching devices to a primary side of a transformer;
- a maximum power point tracking (MPPT) circuit in which a DC voltage supplied to the SMPS circuit passes through a sensing resistor, and input DC power from the outside to an input terminal is connected to the drains of the switching devices;
- a programming circuit comprising an IC that controls a circuit operation by setting a current flowing through sensor resistors in accordance with programmed data and allows to monitor an operating state of the circuit through a network;
- a constant voltage circuit for supplying stable IC power to an inverter;
- an inverter PFC circuit for converting DC voltage to AC voltage so as to increase a voltage;
- an inverter stage circuit for converting input DC power to AC power;
- and
- a refrigerator module that uses AC power in a normal condition when normal AC power is input, and receives AC-DC power in the event of a power failure to operate a refrigerator.
Dependencies are inferred from the claim text.