KR970031196A - Power factor correction circuit for boost converter with output voltage compensation - Google Patents
Power factor correction circuit for boost converter with output voltage compensation Download PDFInfo
- Publication number
- KR970031196A KR970031196A KR1019950041525A KR19950041525A KR970031196A KR 970031196 A KR970031196 A KR 970031196A KR 1019950041525 A KR1019950041525 A KR 1019950041525A KR 19950041525 A KR19950041525 A KR 19950041525A KR 970031196 A KR970031196 A KR 970031196A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- voltage
- output
- sensing unit
- compensating
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
본 발명은 승압형 콘버터의 역률보상회로에 관한 것으로서, 특히 상기 승압형 콘버터의 출력전압의 변동에 따라 레벨이 가감되는 비교기준 전압신호을 발생함과 동시에 출력전압의 변동을 보상하기 위한 보상전압신호를 발생하는 출력감지부; 스위칭 트랜지스터의 온전류에 대응하는 전압신호를 발생하는 전류 감지부: 출력감지부의 비교기준 전압신호와 상기 전류감지부의 전압신호를 합성하여 비교신호를 발생하는 제 1 신호 합성부; 출력감지부의 보상전압신호와 역톱니파신호를 합성하여 출력전압의 변동이 보상된 역톱니파신호를 발생하는 제 2 신호 합성부; 제 1 신호 합성부의 비교신호와 제 2 신호 합성부의 보상된 역톱니파신호를 비교하여 스위칭 트랜지스터의 오프 제어신호를 발생하는 비교기; 및 역톱니파신호의 상승엣지에 동기한 클럭신호에 응답하여 스위칭 트랜지스터를 턴온시키고 비교기의 오프제어신호에 응답하여 스위칭 트랜지스터를 턴오프시키는 구동부를 구비한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power factor correction circuit for a boost converter, and in particular, a compensating voltage signal for generating a comparison reference voltage signal whose level is increased or decreased according to a change in the output voltage of the boost converter, and compensating for a change in the output voltage. An output sensing unit; A current sensing unit for generating a voltage signal corresponding to the on-current of the switching transistor: a first signal synthesizing unit for generating a comparison signal by combining the comparison reference voltage signal of the output sensing unit and the voltage signal of the current sensing unit; A second signal synthesizing unit for synthesizing the compensating voltage signal and the inverse sawtooth wave signal of the output sensing unit to generate an inverse sawtooth signal having a variation in the output voltage; A comparator for comparing the comparison signal of the first signal synthesis unit with the compensated reverse sawtooth signal of the second signal synthesis unit to generate an off control signal of the switching transistor; And a driving unit which turns on the switching transistor in response to a clock signal synchronized with the rising edge of the reverse sawtooth signal and turns off the switching transistor in response to an off control signal of the comparator.
따라서, 본 발명에서는 출력전압의 변동에 따른 보상에 의해 고역률을 달성할 수 있다.Therefore, in the present invention, it is possible to achieve a high power factor by compensating for variations in output voltage.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제 1 도는 본 발명에 의한 출력 전압변동 보상이 가능한 승압형 콘버터의 역률 보상 회로의 구성을 나타낸 회로도.1 is a circuit diagram showing the configuration of a power factor correction circuit of a boost converter capable of compensating for output voltage fluctuation according to the present invention.
제 2 도는 출력전압 변동에 의한 전류왜곡을 설명하기 위한 도면.2 is a diagram for explaining current distortion caused by output voltage variation.
Claims (2)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950041525A KR0170206B1 (en) | 1995-11-15 | 1995-11-15 | Power factor compensation circuit for boost type converter |
JP8182459A JPH09140145A (en) | 1995-11-15 | 1996-07-11 | Boosting converter provided with power-factor compensating circuit |
US08/748,208 US5764039A (en) | 1995-11-15 | 1996-11-12 | Power factor correction circuit having indirect input voltage sensing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950041525A KR0170206B1 (en) | 1995-11-15 | 1995-11-15 | Power factor compensation circuit for boost type converter |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970031196A true KR970031196A (en) | 1997-06-26 |
KR0170206B1 KR0170206B1 (en) | 1999-05-01 |
Family
ID=19434247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950041525A KR0170206B1 (en) | 1995-11-15 | 1995-11-15 | Power factor compensation circuit for boost type converter |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0170206B1 (en) |
-
1995
- 1995-11-15 KR KR1019950041525A patent/KR0170206B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0170206B1 (en) | 1999-05-01 |
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