POWER SUPPLY APPARATUS

• US 20150115713A1
• Filed: 10/30/2014
• Published: 04/30/2015
• Est. Priority Date: 10/31/2013
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group), Solum Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: KIM, Chong Eun, KIM, Don Sik, KIM, Jae Kuk
• Application Number:
  US14/529,030
• Publication Number:
  US 20150115713A1
• Time in Patent Office: Days
• US Class Current: 307/23
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H02M 3/33576 having at least one active switching element at the secondary side of an isolation transformer
• CPC Class Codes: H02M 7/217 using semiconductor devices only
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A power supply apparatus includes a master circuit part charging a battery initially, supplying energy to a load that is a light load, and charging the battery when discharged; and a slave circuit part having a common output terminal with the master circuit part and supplying energy to the load that is a heavy load along with the master circuit part by distributing the load among them, wherein the master circuit part includes a rechargeable battery therein. Energy is supplied to a load using a battery at a low load that is a half load or less in a power supply circuit, thereby increasing energy efficiency.

Claims

1. A power supply apparatus, comprising:

a master circuit part charging a battery initially, supplying energy to a load that is a light load, and charging the battery when discharged; and

a slave circuit part having a common output terminal with the master circuit part and supplying energy to the load that is a heavy load along with the master circuit part by distributing the load among them,

wherein the master circuit part includes a rechargeable battery therein.

2. The power supply apparatus according to claim 1, wherein the master circuit part further includes an initial battery charger for charging the battery initially.

3. The power supply apparatus according to claim 2, wherein the initial battery charger includes:

a transformer receiving AC voltage and generating an output voltage having an amplitude different from that of its input voltage according to a turns ratio between primary and secondary windings thereof;

a switch element producing intermittent current flowing in the primary winding of the transformer; and

a diode rectifying AC voltage induced in the secondary winding of the transformer into DC voltage.

4. The power supply apparatus according to claim 3, wherein the switch element is a MOSFET.

5. The power supply apparatus according to claim 2, wherein the initial battery charger includes:

an AC/DC converting unit that receives AC voltage from an AC voltage source to convert it into DC voltage;

a transformer that converts the DC voltage converted by the AC/DC converting unit into DC voltage having a different amplitude according to the turns ratio between the primary and secondary windings; and

a rectifying unit rectifying an AC component mixed in the DC voltage induced in the secondary winding of the transformer into a DC component.

6. The power supply apparatus according to claim 5, further comprising an inductor that removes a high-frequency noise component mixed in current supplied to the battery through the rectifying unit.

7. The power supply apparatus according to claim 5, wherein the AC/DC converting unit is configured as a full bridge circuit that includes

a first switch element with its one terminal connected to the AC voltage source,

a first diode connected to the first switch element in series,

a second diode connected to the first switch element in parallel, and

a second switch element connected to the second diode in series.

8. The power supply apparatus according to claim 7, wherein the first and second switch elements are MOSFETs.

9. The power supply apparatus according to claim 5, wherein the rectifying unit is configured as a half bridge circuit that includes

a first output diode connected to one terminal of the secondary winding of the transformer in series, and

a second output diode connected to a unit circuit consisting of the secondary winding and the first output diode in parallel.

10. The power supply apparatus according to claim 1, wherein the master circuit part is configured to supply energy to the load that is a half load or less.

11. The power supply apparatus according to claim 1, wherein the slave circuit part is configured to supply power for charging the battery if a voltage level of the battery is at a reference voltage level or less.

12. The power supply apparatus according to claim 1, wherein the slave circuit part includes a bus dedicated for monitoring battery information with the master circuit part.