POWER SUPPLY FOR BOTH AC AND DC

• US 20070195558A1
• Filed: 12/19/2006
• Published: 08/23/2007
• Est. Priority Date: 06/19/2004
• Status: Active Grant

• Current Assignee: Smart Power Solutions, Inc.
• Original Assignee: Smart Power Solutions, Inc.
• Inventors: KIM, Hyun-Jun, KIM, Sang-Min, YOUN, Dae-Young
• Granted Patent: US 7,502,233 B2
• Time in Patent Office: Days
• US Class Current: 363/21.01
• CPC Class Codes: H02M 1/10 Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
• CPC Class Codes: H02M 3/155 using semiconductor devices only
• CPC Class Codes: H02M 3/335 using semiconductor devices only

Abstract

There is provided a power supply for AC/DC and DC/DC conversion which receives the DC power supplied from airplanes, vehicles and vessels as well as normal AC power, and converts the power to DC power and supplies it to portable electronic products. The power supply for AC/DC and DC/DC conversion includes an AC input 10, a DC input 20, a switch 30 for selecting AC input power or DC input power, a DC output 40, and a circuit used for AC/DC and DC/DC conversion 100 which converts the power input from the AC input or the DC input to DC power having predetermined values of current and voltage, and a secondary side of a transformer (TL) for AC/DC conversion inside the circuit for conversion serves as an inductor for performing DC/DC conversion. The power supply for AC/DC and DC/DC conversion is implemented in compact by providing an element capable of operating different functions upon AC/DC and DC/DC conversions respectively and decreasing the number of elements, thereby allowing an efficient and economical use of electric power and generating high power.

Claims

1. A power supply for AC/DC and DC/DC conversion comprising:

an AC input 10;

a DC input 20;

a switch 30 for selecting AC input power or DC input power;

a DC output 40; and

a circuit used for AC/DC and DC/DC conversion 100 which converts the power input from the AC input or the DC input to DC power,

wherein a secondary side of a transformer (TL) for AC/DC conversion inside the circuit for conversion serves as an inductor for performing DC/DC conversion.

2. The power supply according to claim 1, wherein the DC/DC conversion circuit is a non-insulated DC/DC conversion circuit.

3. The power supply according to claim 1, wherein the switch 30 is switched by mechanical switching system or electronical switching system which senses AC or DC input and turns on/off a relay.

4. The power supply according to claim 1, further comprising an output selector 50 having an array of resistors and an adapter 60 so as to select DC output voltages adapted to electronic units to be used.

5. The power supply according to claim 2, further comprising an output selector 50 having an array of resistors and an adapter 60 so as to select DC output voltages adapted to electronic units to be used.

6. The power supply according to claim 3, further comprising an output selector 50 having an array of resistors and an adapter 60 so as to select DC output voltages adapted to electronic units to be used.