Full-resonant power circuit device for receiving a variable input voltage

• US 20070236967A1
• Filed: 04/07/2006
• Published: 10/11/2007
• Est. Priority Date: 04/07/2006
• Status: Active Grant

• Current Assignee: Lite-On Technology Corporation
• Original Assignee: Li Shin International Enterprise Corp. (Lite-On Technology Corporation)
• Inventors: Liu, Chih-Lung, Hsu, Tsai-Liang
• Granted Patent: US 7,286,373 B1
• Time in Patent Office: Days
• US Class Current: 363/21.20
• CPC Class Codes: H02M 1/0058 by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero using an auxiliary actively switched resonant commutation circuit connected to an intermediate DC voltage or between two push-pull branches of an inverter bridge H02M7/4811; in resonant inverters H02M7/4815; in inverters operating from a resonant DC source H02M7/4826
• CPC Class Codes: H02M 1/4241 using a resonant converter
• CPC Class Codes: H02M 1/44 Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• CPC Class Codes: H02M 3/01 Resonant DC/DC converters
• CPC Class Codes: H02M 3/33571 Half-bridge at primary side of an isolation transformer
• CPC Class Codes: H02M 7/4818 with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuits
• 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

The present invention provides a full-resonant power circuit device for receiving a variable input voltage that a power factor correcting circuit for separating a variable input voltage AC into a plurality of supply voltages, and the input voltage sections are detected to separately switch corresponding switch transistors for suitably adding resonance inductors to the input voltage sections to be used by the full-resonant power circuit device to reduce the large voltage difference of a conventional power factor corrector so as to improve the efficiency of the power circuit device and improve a half-bridge resonance circuit that is only operated in a fixed voltage source.

Claims

1. A full-resonant power circuit device for receiving a variable input voltage, comprising:

a power factor corrector received the variable input voltage for boosting the variable input voltage into a supply voltage;

a square wave generator coupled with the power factor corrector for producing a series of square wave voltages in response to the supply voltage;

a primary resonance loop coupled with the square wave generator and composed of a serial capacitor, a first serial inductor and a second serial inductor, wherein the serial capacitor coupled with the first serial inductor and the first serial inductor coupled with the second serial inductor;

a first switch coupled with the primary resonance loop;

at least one secondary resonance loop coupled with the square wave generator and composed of the serial capacitor, the first serial inductor and at least one auxiliary serial inductor, wherein the serial capacitor coupled with the first serial inductor and the first serial inductor coupled with the auxiliary serial inductor;

at least one second switch separately coupled with the secondary resonance loop;

a rectifier circuit coupled with the primary resonance loop for outputting a direct current (DC) voltage in response to the series of square wave voltages; and

a voltage detector for detecting the variable input voltage and separately controlling the first switch and the second switch in response to the variable input voltage.

2. The full-resonant power circuit device as in claim 1, wherein the square wave generator has two switches connected to be a half-bridge structure for generating the square wave voltages.

3. The full-resonant power circuit device as in claim 1, wherein the square wave generator has four switches connected to be a full-bridge structure for generating the square wave voltages.

4. The full-resonant power circuit device as in claim 1, wherein the voltage detector detects the variable input voltage, and separately controls the first switch to conduct the function of the primary resonance loop or the second switch to conduct the function of the secondary resonance loop in response to the variable input voltage.

5. The full-resonant power circuit device as in claim 1, wherein the rectifier circuit is a center tap rectifier circuit.

6. A full-resonant power circuit device for receiving a variable input voltage, comprising:

a power factor corrector received the variable input voltage for boosting the variable input voltage into a supply voltage;

a square wave generator coupled with the power factor corrector for producing a series of square wave voltages in response to the supply voltage;

a primary resonance loop coupled with the square wave generator and composed of a serial capacitor, a first serial inductor and a second serial inductor, wherein the serial capacitor coupled with the first serial inductor and the first serial inductor coupled with the second serial inductor;

a first switch coupled with the primary resonance loop;

a first switch coupled with the primary resonance loop;

at least one secondary resonance loop coupled with the square wave generator and composed of the first serial inductor and at least one auxiliary serial inductor, herein the first serial inductor coupled with the auxiliary serial capacitor;

at least one second switch separately coupled with the secondary resonance loop;

a rectifier circuit coupled with the primary resonance loop for outputting a direct current (DC) voltage in response to the series of square wave voltages; and

a voltage detector for detecting the variable input voltage and separately controlling the first switch and the second switch in response to the variable input voltage.

7. The full-resonant power circuit device as in claim 6, wherein the square wave generator has two switches connected to be a half-bridge structure for generating the square wave voltages.

8. The full-resonant power circuit device as in claim 6, wherein the square wave generator has four switches connected to be a full-bridge structure for generating the square wave voltages.

9. The full-resonant power circuit device as in claim 6, wherein the voltage detector for detects the input voltage, and separately controls the first switch to conduct the function of the primary resonance loop or the second switch to conduct the function of the secondary resonance loop in response to a magnitude of the input voltage.

10. The full-resonant power circuit device as in claim 6, wherein the rectifier circuit is a center tap rectifier circuit.