CN201830137U - High-low pressure input balance power factor correcting circuit - Google Patents
High-low pressure input balance power factor correcting circuit Download PDFInfo
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- CN201830137U CN201830137U CN201020565350XU CN201020565350U CN201830137U CN 201830137 U CN201830137 U CN 201830137U CN 201020565350X U CN201020565350X U CN 201020565350XU CN 201020565350 U CN201020565350 U CN 201020565350U CN 201830137 U CN201830137 U CN 201830137U
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- circuit
- power factor
- capacitor
- pfc
- low pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model discloses a high-low pressure input balance power factor correcting circuit comprising a PFC (power factor correction) chip. A feedback pin of the PFC chip is connected with a compensating circuit; the compensating circuit comprises an RC (resistor-capacitor) circuit which consists of a resistor R41 and a capacitor C21 which are connected in series; and a capacitor C10 is connected with the RC circuit in parallel. For the high-low pressure input balance power factor correcting circuit, the structure is simple; extra circuit elements do not need to be added basically; the implementation cost is low; the bias of the traditional design is overcome; and the resistor in the compensating circuit is changed into the capacitor and then a double-pole-point circuit is formed by being matched with the RC circuit, therefore, loop bandwidth is greatly improved, higher PF (power factor) value can be maintained both in high-voltage input or low-voltage input, and the fluctuation range of voltage is expanded to 90V-305V.
Description
Technical field
The utility model discloses a kind of circuit of power factor correction, particularly a kind of high-low pressure input balanced power factor correcting circuit.
Background technology
Please referring to accompanying drawing 1, switching power circuit all is by an AC input module input AC civil power usually at present, pass through the rectifying and wave-filtering of EMI filtration module and prime rectification filtering module then after, become direct current, be divided into two-way then, wherein one the tunnel is power supply branch, and another road is control branch.Power supply branch inputs to transformer through behind PFC booster circuit module and the LLC circuit module, and transformer output is behind grade current rectifying and wave filtering circuit module rectifying and wave-filtering later, through DC output module output DC source; Control branch comprises opens the machine circuit module, prime rectification filtering module out-put supply is given and is opened the machine circuit module, after opening the machine circuit module and carrying out power source conversion, out-put supply is given PFC control circuit module and LLC control circuit module, the work of PFC control circuit module control PFC booster circuit module, the work of LLC control circuit module control LLC circuit module.The voltage in output voltage sampling circuit module samples DC output module output DC source, and export to feedback module, feedback module is transferred to LLC control circuit module and PFC control circuit module through optocoupler with feedback signal.Common PFC control circuit module mainly is the power factor that is used for the balance input voltage, please referring to accompanying drawing 2, way commonly used is to utilize a pfc controller U1 to finish this function, connection for pfc controller U1, traditional way is the RC circuit that is serially connected with resistance R 41 and capacitor C 21 compositions between the INV of pfc controller U1 pin and COMP pin, the RC circuit is connected in parallel to resistance R 51 therewith, when input voltage was too high or too low, the PFC control circuit module can not finely be carried out balance correction to power factor.
Summary of the invention
Can not fine shortcoming of power factor being carried out balance correction at the PFC control circuit module in the above-mentioned switching power circuit of mentioning of the prior art, the utility model provides a kind of new high-low pressure input balanced power factor correcting circuit, it adopts a capacitor C 10, replaced the resistance R 51 between pfc controller INV pin and the COMP pin, addressed the above problem.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of high-low pressure input balanced power factor correcting circuit, comprise the PFC chip, be connected with compensating circuit on the feedback pin of PFC chip, described compensating circuit comprises the resistance R 41 of series connection and the RC circuit that capacitor C 21 is formed, and is connected in parallel to capacitor C 10 with the RC circuit.
The technical scheme that its technical problem that solves the utility model adopts further comprises:
The size of described capacitor C 10 is 104/50V.
The beneficial effects of the utility model are: the utility model circuit structure is simple, need not to increase the additional circuit element basically, realizes that cost is low.The utility model has overcome traditional design prejudice, changed the resistance in the compensating circuit into electric capacity, cooperate the RC circuit to constitute the duopole circuit again, improve loop bandwidth greatly, make no matter high voltage is imported when still low-voltage is imported, can both keep higher PF value, it is big to 90V～305V that the voltage domain of walker is enlarged.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is switching power circuit block diagram commonly used.
Fig. 2 is present PFC control circuit partial circuit schematic diagram.
Fig. 3 is the utility model circuit theory diagrams.
Embodiment
Present embodiment is the utility model preferred implementation, and other all its principles are identical with present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 1, switching power circuit and switch power supply line structure of the prior art that the utility model is used carry out, it all is by an AC input module input AC civil power, after passing through the rectifying and wave-filtering of EMI filtration module and prime rectification filtering module then, become direct current, be divided into two-way then, wherein one the tunnel is power supply branch, and another road is control branch.Power supply branch inputs to transformer through behind PFC booster circuit module and the LLC circuit module, and transformer output is behind grade current rectifying and wave filtering circuit module rectifying and wave-filtering later, through DC output module output DC source; Control branch comprises opens the machine circuit module, prime rectification filtering module out-put supply is given and is opened the machine circuit module, after opening the machine circuit module and carrying out power source conversion, out-put supply is given PFC control circuit module and LLC control circuit module, the work of PFC control circuit module control PFC booster circuit module, the work of LLC control circuit module control LLC circuit module.The voltage in output voltage sampling circuit module samples DC output module output DC source, and export to feedback module, feedback module is transferred to LLC control circuit module and PFC control circuit module through optocoupler with feedback signal.
The utility model mainly is the improvement that the PFC control circuit module in the accompanying drawing 1 is carried out, please referring to accompanying drawing 3, mainly comprise pfc controller U1 in the utility model, be serially connected with the RC circuit that resistance R 41 and capacitor C 21 are formed between the INV pin of pfc controller U1 and the COMP pin, in the present embodiment, the RC circuit is connected in parallel to capacitor C 10 therewith, in the present embodiment, capacitor C 10 sizes are 104/50V, in the utility model, capacitor C 10 is added resistance R 41 and the capacitor C 21 in the RC circuit, then constitute the duopole circuit, improved the bandwidth of loop greatly, make no matter high voltage is imported when still low-voltage is imported, can both keep higher PF value, it is big to 115V～264V that the voltage domain of walker is enlarged.
The break-make of the GD pin control switch pipe Q17 of pfc controller U1, the purpose of realization output square wave.The VFF interface of pfc controller U1 is by the resistance R 40 and resistance R 56 ground connection of series connection, the common point of resistance R 40 and resistance R 56 is connected with the collector electrode of triode Q20, the emitter of triode Q20 is connected with the RUN pin of pfc controller U1, the base stage of triode Q20 is by resistance R 57 ground connection, simultaneously, the base stage of triode Q20 also is connected with the C point by resistance R 18, C point in the utility model is with of the prior art identical, be generally the PFC control signal of back level, when back level PFC breaks down, can turn-off pfc controller U1 by this some input.Pfc controller U1 model in the present embodiment is L6563A, when specifically implementing, also can adopt other chips of identical function to replace.
The utility model circuit structure is simple, need not to increase the additional circuit element basically, realizes that cost is low.The utility model has overcome traditional design prejudice, changed the resistance in the compensating circuit into electric capacity, cooperate the RC circuit to constitute the duopole circuit again, improve loop bandwidth greatly, make no matter high voltage is imported when still low-voltage is imported, can both keep higher PF value, it is big to 90V～305V that the voltage domain of walker is enlarged.
Claims (2)
1. a high-low pressure is imported the balanced power factor correcting circuit, comprise the PFC chip, it is characterized in that: be connected with compensating circuit on the feedback pin of described PFC chip, described compensating circuit comprises the resistance R 41 of series connection and the RC circuit that capacitor C 21 is formed, and is connected in parallel to capacitor C 10 with the RC circuit.
2. according to claim a kind of high-low pressure input balanced power factor correcting circuit, it is characterized in that: the size of described capacitor C 10 is 104/50V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020565350XU CN201830137U (en) | 2010-10-16 | 2010-10-16 | High-low pressure input balance power factor correcting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020565350XU CN201830137U (en) | 2010-10-16 | 2010-10-16 | High-low pressure input balance power factor correcting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830137U true CN201830137U (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020565350XU Expired - Lifetime CN201830137U (en) | 2010-10-16 | 2010-10-16 | High-low pressure input balance power factor correcting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201830137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958641A (en) * | 2010-10-16 | 2011-01-26 | 深圳茂硕电源科技股份有限公司 | High- and low -voltage input balancing power factor correction circuit |
-
2010
- 2010-10-16 CN CN201020565350XU patent/CN201830137U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958641A (en) * | 2010-10-16 | 2011-01-26 | 深圳茂硕电源科技股份有限公司 | High- and low -voltage input balancing power factor correction circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MOSO POWER SUPPLY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN MOSO POWER SUPPLY TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Shenzhen Nanshan District City, Guangdong province 518108 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Patentee after: MOSO Power Supply Technology Co., Ltd. Address before: Shenzhen Nanshan District City, Guangdong province 518108 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Patentee before: Shenzhen MoSo Power Supply Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |