Half-bridge resonant converter

• US 20070291515A1
• Filed: 01/11/2007
• Published: 12/20/2007
• Est. Priority Date: 06/19/2006
• Status: Active Grant

• Current Assignee: Chicony Power Technology Co. Ltd. (Chicony Electronics Company Limited)
• Original Assignee: Hipro Electronics Company Limited (Chicony Electronics Company Limited)
• Inventors: Huang, Ming-Ho
• Granted Patent: US 7,760,521 B2
• Time in Patent Office: Days
• US Class Current: 363/17
• CPC Class Codes: H02M 3/33592 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
• CPC Class Codes: H02M 3/3376 with automatic control of output voltage or current
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

A half-bridge resonant converter includes: a primary winding; a secondary winding having a first and a second end and a central point; a first electronic switch; a second electronic switch; a first power-storage element; a second power-storage element; and a load having a first and a second end. Wherein, the first end of said the secondary winding serially connects with said the first electronic switch and the first power-storage element, and the second end of said the secondary winding serially connects with said the second electronic switch and the second power-storage element, and the first end of said the load connects simultaneously with said the first power-storage element and the second power-storage element, and the second end connects with the central point of the secondary winding.

Claims

1. A half-bridge resonant converter, comprising:

a primary winding;

a secondary winding having a first and a second end, and a central point;

a first electronic switch having a first and a second end, wherein said first end connects with the first end of said secondary winding;

a second electronic switch having a first and a second end, wherein said first end connects with the second end of said secondary winding;

a first power-storage element having a first and a second end, wherein said first end connects with the second end of said first electronic switch;

a second power-storage element having a first and a second end, wherein said first end connects with the second end of said second electronic switch; and

a load having a first and a second end, wherein said first end connects simultaneously with the second end of said first power-storage element and the second end of the second power-storage element, and said second end connects with the central point of said secondary winding.

2. The half-bridge resonant converter according to claim 1, wherein the action of said first electronic switch is in the reverse of said second electronic switch, and causes the first end or the second end of said secondary winding to conduct said load alternatively.

3. The half-bridge resonant converter according to claim 1, wherein said first electronic switch comprises a MOSFET and a third winding bridged with the Gate (G) and the Source (S) of said MOSFET, further the first end of said first electronic switch is the Source (S) of said MOSFET, and the second end is the Drain (D) of said MOSFET.

4. The half-bridge resonant converter according to claim 1, wherein said second electronic switch comprises a MOSFET and a third winding bridged with the Gate (G) and the Source (S) of said MOSFET, further the first end of the second electronic switch is the Source (S) of said MOSFET, and the second end is the Drain (D) of said MOSFET.

5. The half-bridge resonant converter according to claim 3, wherein the third winding of said first electronic switch and the third winding of said second electronic switch are the same windings with equal coil number.

6. The half-bridge resonant converter according to claim 1, wherein said first power-storage element is a combination of an inductance in parallel with a series connection of a diode and a resistance, so that the power of said inductance can be released through the series connection of said diode and said resistance, moreover the first end of said first power-storage element is the positive end of said diode, and the second end of said first power-storage element is the end of the combination of said resistance and said inductance.

7. The half-bridge resonant converter according to claim 1, wherein the second power-storage element is a combination of an inductance in parallel with a series of a diode and a resistance, so that the power of said inductance can be released through the series connection of said diode and said resistance, moreover the first end of said second power-storage element is the positive and of said diode, and the second end of said second power-storage element is the end of the combination of said resistance and said inductance.