CN102684471A - Single-stage isolation power factor correction (PFC) power circuit for zero input rectifying element - Google Patents
Single-stage isolation power factor correction (PFC) power circuit for zero input rectifying element Download PDFInfo
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- CN102684471A CN102684471A CN2012101252693A CN201210125269A CN102684471A CN 102684471 A CN102684471 A CN 102684471A CN 2012101252693 A CN2012101252693 A CN 2012101252693A CN 201210125269 A CN201210125269 A CN 201210125269A CN 102684471 A CN102684471 A CN 102684471A
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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 invention belongs to the technical field of electric power supply and relates to a power factor correction (PFC) power circuit, in particular to a single-stage isolation PFC power circuit for a zero input rectifying element. The single-stage isolation PFC power circuit comprises at least one pair of power tubes in reverse connection. The characteristic of unidirectional work of a parasitic diode inside a transistor is utilized in the PFC power circuit, and the power tubes can only work at a positive half cycle on the condition of alternating-current input currently. Two power elements are reversely directly connected or are reversely connected through a transformer in the PFC power circuit, so that one power tube is in charge of work in the positive half cycle, and the other power tube is in charge of work in the negative half cycle, the effects of working in the positive half cycle and the negative half cycle are achieved on the condition of alternating-current input, rectification is not required, input node consumption and loss of a traditional PFC power circuit are reduced, and the power factor (PF) value can be improved to 1.
Description
Technical field:
The invention belongs to the electric supply technical field, relate to the PFC power circuit, be specifically related to a kind of single-stage isolation PFC power circuit that is used to not have the input rectifying element.
Background technology:
Power tube is the necessary element in the PFC power circuit; In the existing power tube all parasitism diode is arranged; Because the unidirectional on state characteristic of diode at present PFC power circuit in use, is all imported with direct current; The civil power that promptly exchanges can input to the PFC power circuit after need passing through and being rectified into direct current, and therefore present PFC power circuit all contains the input rectifying element inside.Like this, because receive the influence of rectifier cell rectifier bridge forward conduction threshold values, the PF value of PFC power circuit is the highest can only to reach 0.98～0.99, and can't reach 1.Under the abominable day by day situation of present earth environment, we have higher requirement to all power consumption equipments, and that is exactly to improve available power as far as possible, reduces useless power consumption and reduces greenhouse effect, reduces the influence of the mankind to climatic environment.
Summary of the invention:
The objective of the invention is to overcome existing PFC power circuit can't can't reach defective such as 1 to exchange input, PF value, and a kind of single-stage isolation PFC power circuit that is used to not have the input rectifying element is provided.
The present invention realizes that the technical scheme that its purpose adopts is: a kind of single-stage isolation PFC power circuit that is used to not have the input rectifying element, described single-stage is isolated and is contained at least one pair of reverse power tube that connects in the PFC power circuit.
PFC power circuit of the present invention can have following three basic topological structures, that is:
Described single-stage is isolated the PFC power circuit for recommending PFC power circuit through the reverse power tube that connects of high frequency transformer with the no input rectifying element single-stage isolation that push pull mode forms by two pairs.
Perhaps, described single-stage is isolated the PFC power circuit and is isolated normal shock PFC power circuit for the no input rectifying element single-stage that the power tube by a pair of reverse connection forms with the normal shock mode.
Perhaps, described single-stage is isolated the PFC power circuit no input rectifying element single-stage that at least two pairs of reverse power tubes that connect form with the bridge-type mode of serving as reasons and is isolated bridge-type PFC power circuit.
PFC power circuit of the present invention has utilized the characteristic of transistor one-way only operation; Because all parasitic diode in the power tube, therefore power tube can only be in positive half cycle work under the situation that exchanges input, and the present invention is through directly being connected by two power components reverse (dorsad) or through the transformer connection; Like this; A power tube is responsible for positive half cycle work, and another power tube then is responsible for negative half period work, thereby can under the situation that exchanges input, realize the positive and negative effect that can both work.Just because of can be to exchange direct input; Therefore need not rectification, under the situation that does not have the input rectifying bridge, reduced the node loss and the loss of conventional P FC power circuit of input in theory; Can the PF value be improved at least 2.0%; Reach 1, thereby it is linear more that the electrorheological of mains supply system is got, also with regard to relative reduction the excess losses that cause because of reactive power of all electric power converting equipments.Adopt single-stage to isolate conversion simultaneously and also reduced all Switching Power Supply the inside volumes.
Description of drawings:
Fig. 1 is that the present invention does not have the circuit theory diagrams that the PFC power circuit is recommended in the isolation of input rectifying element single-stage;
Fig. 2 is that the present invention does not have the circuit theory diagrams that input rectifying element single-stage is isolated normal shock PFC power circuit;
Fig. 3 is that the present invention does not have the circuit theory diagrams that input rectifying element single-stage is isolated bridge-type PFC power circuit.
Embodiment:
Below in conjunction with specific embodiment and accompanying drawing the present invention is further specified.
In conjunction with Fig. 1～shown in Figure 3, at first, the present invention realizes exchanging the operation principle of the no rectifier cell of input:
When the positive half cycle of electrical network input; The parasitic diode of the K2 of the K1 of following power tube: Fig. 1 and K3, Fig. 2, the K2 of Fig. 3 and K4 inside is with conducting; These power tubes will be seen a fixing driving voltage off to making it be operated in degree of depth saturation condition through Drive and Control Circuit simultaneously; Be used for short circuit endophyte diode and form a short-circuit conductors, have only line loss, do not have the purpose in diode rectification loss and conducting dead band thereby reach input; And this moment Fig. 1 K1 and the K3 of K1, Fig. 3 of K2 and K4, Fig. 2 will be operated in the PWM state and remove to drive high frequency transformer and transmit energy and arrive primary side.When electrical network is imported at negative half period; The K2 of the K1 of power tube Fig. 1 and K3, Fig. 2, the K2 of Fig. 3 and K4 transfer pass-through state to the PWM state by control circuit; And the K1 of the K1 of the K2 of Fig. 1 and K4, Fig. 2, Fig. 3 and K3 transfer pass-through state to by the PWM state of positive half cycle, continue to transmit energy to primary side.
Distinguish the course of work of every kind of basic topological structure of accompanying drawings below:
1. do not have the isolation of input rectifying element single-stage and recommend the PFC power circuit
As shown in Figure 1; Power tube K1 connects and composes a pair of reverse power tube that is connected with K4 through high frequency transformer; Power tube K2 also connects and composes a pair of reverse power tube that is connected through high frequency transformer with K3, and two pairs of reverse power tubes that connect form the single-stage isolation with push pull mode and recommend the PFC power circuit then.The course of work is following: filtered civil power input directly inserts A, the B two ends of Fig. 1 through the EMI filter circuit; When input voltage when to be operated in A be positive B for negative half cycle; The endophyte diode of K1 and K3 is with automatic conducting, and the inner parasitic diode of K2 and K4 oppositely ends.When control and pwm circuit when setting up; K1 and K3 can deliver to driving the parasitic diode short circuit that (PWM1-B adds inversion driving signal 1, PWM2-B adds inversion driving signal 1) makes power tube inside through control circuit; Form a short-circuit conductors, K2 and K4 then have PWM control.In K2 conduction period, the normal magnetization current conversion of the P1 winding of push-pull transformer is a magnetic energy, converts magnetic energy into electric energy by primary side winding S then, continues like this to have accomplished that output voltage is isolated and realized the purpose that output voltage can change arbitrarily again; After the K2 conducting finishes; K4 gets into conducting state immediately; The magnetic reversal current conversion of the P2 winding of push-pull transformer is a magnetic energy; Convert electric energy by magnetic energy into through secondary winding again, two winding alternations are finally changed electric energy to secondary load through secondary rectifier cell and filter capacitor.
2. do not have input rectifying element single-stage and isolate normal shock PFC power circuit
As shown in Figure 2, power tube K1 directly oppositely connects and composes a pair of reverse power tube that is connected with K2; The course of work is following: filtered civil power input directly inserts I, the J two ends of Fig. 2 through the EMI filter circuit; When input voltage is operated in the positive J negative half period of I; PWMB adds inversion driving signal 2 and directly sees a fixed voltage off to K2 by control and PWM drive circuit, makes it be operated in long-term conducting state.K1 added pwm signal of inversion driving signal 1 output by PWMA and removed to drive high frequency transformer this moment, gave secondary winding with the NE BY ENERGY TRANSFER of primary side, and the D2 of primary side is responsible for giving energy storage inductor L1 with NE BY ENERGY TRANSFER.By the time, the D1 of primary side is responsible for the L1 energy is continued to pass to load through the transformer internal inductance, simultaneously L1 and D1 have also quickened the magnetic reset of high frequency transformer between the off period, when the input civil power is operated in the positive I of J and bears, otherwise K1, K2 and D1, D2 are then.
3. do not have input rectifying element single-stage and isolate bridge-type PFC power circuit
As shown in Figure 3; Power tube K1 directly oppositely connects and composes a pair of reverse power tube that is connected with K2; Power tube K3 also directly oppositely connects and composes a pair of reverse power tube that is connected with K4, and two pairs of reverse power tubes that connect form single-stage isolation bridge-type PFC power circuit with the bridge-type mode then.The course of work is following: O, the P two ends of directly inserting Fig. 3 through the filtered civil power of EMI filter circuit; When input voltage is operated in the positive P negative half period of O; Control and PWM drive circuit will be seen a fixed voltage off makes its K2 and K4 be operated in degree of depth saturation condition to PWM-B and inversion driving signal 2, PWM-D and inversion driving signal 2; And PWM-A and inversion driving signal 1, PWM-C and inversion driving signal 1 are seen PWM off by control and PWM drive circuit and are driven to divide and be clipped to K1 and K3 alternation; The energy of the primary side of high frequency transformer is directly passed to the primary side winding, and then gives output loop with NE BY ENERGY TRANSFER by elements such as the rectification of primary side, energy storage, filtering.(if when realizing that full-bridge does not have input rectifying and isolates PFC, can replace C3 with the elementary winding other end that identical K1～K4 is connected on high frequency transformer, C4 gets final product.）
Certainly, more than three be several preferred embodiment of the present invention, the present invention can also derive other execution modes according to above basic topological structure and circuit theory.
In sum; PFC power circuit of the present invention has utilized the characteristic of transistor one-way only operation; Because all parasitic diode in the power tube, therefore power tube can only be in positive half cycle work under the situation that exchanges input, and the present invention is through directly being connected by two power components reverse (dorsad) or through the transformer connection; Like this; A power tube is responsible for positive half cycle work, and another power tube then is responsible for negative half period work, thereby can under the situation that exchanges input, realize the positive and negative effect that can both work.Just because of can be to exchange direct input; Therefore need not rectification, under the situation that does not have the input rectifying bridge, reduced the node loss and the loss of conventional P FC power circuit of input in theory; To improve at least 2.0%; Can the PF value be brought up to 1, thereby it is linear more that the electrorheological of mains supply system is got, also with regard to relative reduction the excess losses that cause because of reactive power of all electric power converting equipments.Adopt single-stage to isolate conversion simultaneously and also reduced all Switching Power Supply the inside volumes.
Advantage of the present invention is mainly reflected in:
1). be directed against three phase full bridge PFC technology at present also in the primary stage, can control by more stable realization three-phase PFC through ripe Single-phase PFC technology;
2). all former PFC circuit for power conversion all can be bigger because of traditional rectification circuit and these two the node losses of PFC power circuit, can reduce the two-stage loss with this technology;
3). in the conducting dead band that does not have the input rectifying element, make the operating current of civil power linear more, can accomplish that really PF is 1;
4). adopt bridge-type or push-pull configuration to form three-phase PFC power controlling circuit, high frequency transformer is realized two-way magnetization, has effectively reduced the volume of transformer, has really realized high power density;
5). adopt this technology, reduced independent one-level PFC power circuit, the volume of equipment is littler before comparable with constant power the time;
6). do not have the PFC of former traditional approach to export big capacity electrochemical capacitor, can be effectively realize the little current start of start, reduced device start moment heavy current impact electrical network through the PWM soft starting mode;
7). all power tubes need not whole process be operated in the PWM state; Only the wherein half cycle in the civil power input just has switching loss; Half cycle has only the direct current loss in addition, so guaranteed all power components is arranged the enough heat radiation time, and radiating effect is better than traditional in the past mode.
Claims (4)
1. a single-stage isolation PFC power circuit that is used to not have the input rectifying element is characterized in that: contain at least one pair of reverse power tube that connects in the described single-stage isolation PFC power circuit.
2. a kind of single-stage isolation PFC power circuit that is used to not have the input rectifying element according to claim 1 is characterized in that: described single-stage is isolated the PFC power circuit for recommending PFC power circuit through the reverse power tubes that connect of high frequency transformer with the no input rectifying element single-stages isolation that push pull mode forms by two pairs.
3. a kind of single-stage isolation PFC power circuit that is used to not have the input rectifying element according to claim 1, it is characterized in that: described single-stage is isolated the PFC power circuit and is isolated normal shock PFC power circuit for the no input rectifying element single-stage that the power tube by a pair of reverse connection forms with the normal shock mode.
4. a kind of single-stage that is used to not have the input rectifying element according to claim 1 is isolated the PFC power circuit, it is characterized in that: described single-stage is isolated the PFC power circuit no input rectifying element single-stage that at least two pairs of reverse power tubes that connect form with the bridge-type mode of serving as reasons and is isolated bridge-type PFC power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101252693A CN102684471A (en) | 2012-04-25 | 2012-04-25 | Single-stage isolation power factor correction (PFC) power circuit for zero input rectifying element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101252693A CN102684471A (en) | 2012-04-25 | 2012-04-25 | Single-stage isolation power factor correction (PFC) power circuit for zero input rectifying element |
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| CN102684471A true CN102684471A (en) | 2012-09-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655753A (en) * | 2016-11-09 | 2017-05-10 | 深圳市拓革科技有限公司 | Single-phase bridgeless isolated power factor adjusting circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860189A (en) * | 2009-04-13 | 2010-10-13 | 台达电子工业股份有限公司 | Bridgeless power factor correcting circuit for critical continuous current mode and method thereof |
| CN102291037A (en) * | 2011-07-22 | 2011-12-21 | 上海交通大学 | Alternating-current push-pull inversion-controllable rectification step-down circuit |
| CN102405585A (en) * | 2009-04-20 | 2012-04-04 | 伊顿工业公司 | Pfc booster circuit |
-
2012
- 2012-04-25 CN CN2012101252693A patent/CN102684471A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860189A (en) * | 2009-04-13 | 2010-10-13 | 台达电子工业股份有限公司 | Bridgeless power factor correcting circuit for critical continuous current mode and method thereof |
| CN102405585A (en) * | 2009-04-20 | 2012-04-04 | 伊顿工业公司 | Pfc booster circuit |
| CN102291037A (en) * | 2011-07-22 | 2011-12-21 | 上海交通大学 | Alternating-current push-pull inversion-controllable rectification step-down circuit |
Non-Patent Citations (1)
| Title |
|---|
| JONG-WON SHIN ETC,: "Bridgeless isolated PFC rectifier using bidirectional switch and dual output windings", 《ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE), 2011 IEEE》, 31 December 2011 (2011-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655753A (en) * | 2016-11-09 | 2017-05-10 | 深圳市拓革科技有限公司 | Single-phase bridgeless isolated power factor adjusting circuit |
| CN106655753B (en) * | 2016-11-09 | 2019-06-21 | 深圳市拓革科技有限公司 | The single-phase no isolated function of bridge of one kind is because of adjustment circuit |
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Application publication date: 20120919 |