CN105656296A - Soft switch auxiliary circuit, two-phase or three-phase input PFC circuit and control method - Google Patents
Soft switch auxiliary circuit, two-phase or three-phase input PFC circuit and control method Download PDFInfo
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- CN105656296A CN105656296A CN201410654481.8A CN201410654481A CN105656296A CN 105656296 A CN105656296 A CN 105656296A CN 201410654481 A CN201410654481 A CN 201410654481A CN 105656296 A CN105656296 A CN 105656296A
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- 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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Abstract
The invention relates to a soft switch auxiliary circuit comprising an auxiliary switching tube, a resonant inductor, a second diode and n first diodes. The n is an integer larger than 1. Besides, auxiliary circuit has a first end, ..., and a (n+2)th end. First ends of the n first diodes are connected with the first end, ..., and the nth end of the auxiliary circuit; second ends of the n first diodes are connected to a first end of the resonant inductor jointly; a second end of the resonant inductor is connected to the (n+1) th end of the auxiliary circuit by the second diode; and the second end of the resonant inductor is connected to the (n+2) end of the auxiliary circuit by the auxiliary switching tube. In addition, the invention also provides a two-phase input PFC circuit, a three-phase input PFC circuit, and a control method thereof, and an uninterruptable power supply. According to the invention, with sharing of the auxiliary switching tube and the resonant inductor, the number of the auxiliary switching tube and the resonant inductor is effectively reduced while the soft connection effect is guaranteed. And the system complexity is reduced and the reliability is improved.
Description
Technical field
The present invention relates to circuit technical field, more specifically, it relates to a kind of Sofe Switch auxiliary circuit, two-phase input pfc circuit, three-phase input pfc circuit and control method thereof and uninterruptible power supply.
Background technology
Along with the development of power electronics, system efficiency more and more becomes important index, and in order to improve system efficiency, Sofe Switch, accurate tank circuit etc. are constantly suggested, by vast power electronics practitioner research, development. Boosting (boost) circuit, as a widely used circuit, proposes a lot of boost circuit soft switch circuit type in recent years, to reduce the loss that diode reverse recovery under continuous mode (CCM) brings.
As shown in Figure 1, it is typical soft switch circuit a kind of in prior art. Wherein, switching tube Q1 is main switch, and switching tube Q2 is auxiliary switch pipe, and inductance L r1 is resonant inductance, and electric capacity C1 is bus capacitor. Wherein resonant inductance Lr1, auxiliary switch pipe Q2, diode D2 constitute Sofe Switch auxiliary circuit. Before opening main switch Q1, first open auxiliary switch pipe Q2, due to the existence of resonant inductance Lr1, slowly reduced by the electric current of diode D1, avoid reverse recovery loss. When equaling the electric current by inductance L 1 by the electric current of resonant inductance Lr1, open main switch Q1, now owing to the electric current of inductance L 1 can not suddenly change so that main switch Q1 achieves zero current turning-on.
If but when this boost circuit is expanded to pfc circuit, if single phase circuit then can directly use the mode of Fig. 1, if being two circuitry phases or the pfc circuit of three-phase input, it is necessary to many group Sofe Switch auxiliary circuits. In two-phase input pfc circuit as shown in Figure 2, this two-phase input pfc circuit comprise just to boost circuit is identical with structure with it but contrary the bearing to boost circuit of the sense of current.Wherein just comprising 2 main inductances if inductance L 1, L2,2 main switch are such as Q11, Q12 to boost circuit, bus capacitor C1,2 the 5th diode is such as diode D51, D52, and 2 the 6th diodes are such as diode D61, D62. A phase input terminus connects the first end of main switch Q11 successively through the inductance L 1 of series connection and diode D51, and the 2nd end of main switch Q11 and the negative pole of bus capacitor C1 meet zero line side N; The first end of main switch Q11 also connects the positive pole of bus capacitor C1 through diode D61. Wherein the first end of main switch Q11 is one end of electric current input, is also called current input terminal. 2nd end of main switch Q11 is one end that electric current exports, and can be called again electric current output terminal. This just also comprises the first Sofe Switch auxiliary circuit being made up of auxiliary switch pipe Q21, resonant inductance Lr1 and diode D21 to boost circuit. Wherein the first end of resonant inductance Lr1 is connected with the current input terminal of main switch Q11, and the 2nd end of resonant inductance Lr1 is connected to the first end of auxiliary switch pipe Q21, and is connected to the positive pole of bus capacitor by diode D21. Equally, the circuit connecting relation of B phase input terminus is identical with it, comprises inductance L 2, diode D52, diode D62 and main switch Q12, and the 2nd Sofe Switch auxiliary circuit being made up of auxiliary switch pipe Q22, resonant inductance Lr2 and diode D22. Mirror image is formed with it to boost circuit so that the switching tube that whole circuit uses and resonant inductance quantity are multiplied owing to bearing. This two-phase input pfc circuit at least needs 4 auxiliary switch pipes such as Q21-Q24, and 4 resonant inductances are such as Lr1-Lr4.
Equally, in three-phase input pfc circuit as shown in Figure 3, owing to adding C phase input terminus, therefore also corresponding inductance L 3, diode D53, diode D63 and main switch Q13 is added, and the three-soft-switch auxiliary circuit being made up of auxiliary switch pipe Q23, resonant inductance Lr3 and diode D23. This three-phase input pfc circuit at least needs 6 auxiliary switch pipes such as Q21-Q26, and 6 resonant inductances are such as Lr1-Lr6.
Visible, during by boost circuit application to power factor correction (PFC) occasion, if the quantity of corresponding Sofe Switch auxiliary circuit to be consistent with the quantity of main switch in polyphase circuit. Owing to the mean current of Sofe Switch auxiliary circuit and power loss are all far below main switch, and the input pulse current requirements of auxiliary switch pipe requires it is consistent with main switch, therefore the pipe that opens the light that capacity is very little cannot be selected, add increasing number, circuit complexity and cost increase, and reliability reduces.
Summary of the invention
The technical problem to be solved in the present invention is, the auxiliary switch pipe quantity used when being applied to pfc circuit for existing Sofe Switch auxiliary circuit is more causes circuit complexity and the higher defect of cost, Sofe Switch auxiliary circuit, the two-phase of a kind of shared auxiliary switch pipe is provided to input pfc circuit, three-phase input pfc circuit and control method thereof and uninterruptible power supply, can effective components and parts, reduce system complexity, it is to increase reliability.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Sofe Switch auxiliary circuit of structure, comprising: auxiliary switch pipe, resonant inductance, the 2nd diode and n the first diode; Wherein n be greater than 1 integer; Described Sofe Switch auxiliary circuit has first end to the n-th+2 end; The first end of described n the first diode is connected with first end to the n-th end of Sofe Switch auxiliary circuit respectively, 2nd end of described n the first diode is connected to the first end of described resonant inductance jointly, 2nd end of described resonant inductance is connected to the (n+1)th end of described Sofe Switch auxiliary circuit by described 2nd diode, and the 2nd end of described resonant inductance is also connected with the n-th+2 end of Sofe Switch auxiliary circuit by described auxiliary switch pipe.
According to, in Sofe Switch auxiliary circuit of the present invention, described Sofe Switch auxiliary circuit also comprises: n resonant capacitance, n group the 3rd diode and the 4th diode; And described Sofe Switch auxiliary circuit also has the n-th+3 end to 2n+2 end; The 3rd diode and the 4th diode series aiding connection often organized in described n group the 3rd diode and the 4th diode are connected between the 2nd end of described resonant inductance and the (n+1)th end of described Sofe Switch auxiliary circuit together afterwards; Often organize the node between described 3rd diode and the 4th diode to be connected to 2n+2 end with the n-th+3 end of Sofe Switch auxiliary circuit respectively by a resonant capacitance.
Present invention also offers another kind of Sofe Switch auxiliary circuit, comprising: auxiliary switch pipe, resonant inductance, n the first diode, n resonant capacitance and n group the 3rd diode and the 4th diode; Wherein n be greater than 1 integer; Described Sofe Switch auxiliary circuit has first end to 2n+2 end;
The first end of described n the first diode is connected with first end to the n-th end of Sofe Switch auxiliary circuit respectively, 2nd end of described n the first diode is connected to the first end of described resonant inductance jointly, and the 2nd end of described resonant inductance is connected with the n-th+2 end of Sofe Switch auxiliary circuit by described auxiliary switch pipe;
The 3rd diode and the 4th diode series aiding connection often organized in described n group the 3rd diode and the 4th diode are connected between the 2nd end of described resonant inductance and the (n+1)th end of described Sofe Switch auxiliary circuit together afterwards; And the node often organized between described 3rd diode and the 4th diode is connected to 2n+2 end with the n-th+3 end of Sofe Switch auxiliary circuit respectively by a resonant capacitance.
Present invention also offers a kind of two-phase input pfc circuit, comprise just to boost circuit with bear to boost circuit; Described just all have a bus capacitor and two main switches to boost circuit with bearing in boost circuit; Described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, the 2nd diode and two the first diodes;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe, and the 2nd end of resonant inductance by just to the 2nd diode be connected to the positive pole of bus capacitor;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, 2nd end of resonant inductance is connected by the current input terminal of auxiliary switch pipe with described main switch, and the 2nd end of resonant inductance is connected to the negative pole of bus capacitor by the 2nd reverse diode.
Inputting in pfc circuit according to two-phase of the present invention, described Sofe Switch auxiliary circuit also comprises: two resonant capacitances, two group of the 3rd diode and the 4th diode;
Described just in boost circuit: just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to just to the current input terminal of each main switch in boost circuit by a resonant capacitance respectively;
Described bear in boost circuit: often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
Present invention also offers another kind of two-phase input pfc circuit, comprise just to boost circuit with bear to boost circuit; Described just all have a bus capacitor and two main switches to boost circuit with bearing in boost circuit; Described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, two the first diodes, two resonant capacitances, and two group of the 3rd diode and the 4th diode;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, the 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe; Just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after the 3rd diode often organized and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, and the 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe; And often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
Present invention also offers a kind of three-phase input pfc circuit, comprise just to boost circuit with bear to boost circuit; Described just all have a bus capacitor and three main switches to boost circuit with bearing in boost circuit; Described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, the 2nd diode and three the first diodes;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe, and the 2nd end of resonant inductance by just to the 2nd diode be connected to the positive pole of bus capacitor;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe, and the 2nd end of resonant inductance is connected to the negative pole of bus capacitor by the 2nd reverse diode.
Inputting in pfc circuit according to three-phase of the present invention, described Sofe Switch auxiliary circuit also comprises: three resonant capacitances, three group of the 3rd diode and the 4th diode;
Described just in boost circuit: just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: often organize the 3rd diode and the 4th diode series aiding connection together after Opposite direction connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
Present invention also offers another kind of three-phase input pfc circuit, comprise just to boost circuit with bear to boost circuit; Described just all have a bus capacitor and three main switches to boost circuit with bearing in boost circuit; Described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, three the first diodes, three resonant capacitances, and three group of the 3rd diode and the 4th diode;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, the 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe; Just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, and the 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe; And often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
Present invention also offers another kind of three-phase input pfc circuit, comprise just to boost circuit with bear to boost circuit; Described just all have a bus capacitor and three main switches, the described main inductance being just connected to every phase to the current input terminal of each main switch in boost circuit by a 8th reverse diode to boost circuit with bearing in boost circuit; The electric current output terminal bearing each main switch in boost circuit by one just to the 8th diode be connected to the main inductance of every phase; Described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, three the first diodes, three resonant capacitances, and three group of the 3rd diode and the 4th diode;
Described just in boost circuit: the first end of resonant inductance is connected to the anode of each the 8th diode respectively by a first reverse diode, and the 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe; Just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: the first end of resonant inductance respectively by one just to the first diode be connected to the anode of each the 8th diode, the 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe; And often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance. Present invention also offers a kind of circuit control method, it is applicable to foregoing two-phase input pfc circuit or three-phase input pfc circuit, the control signal rising edge alignment of each main switch in described circuit, and before the unlatching of each main switch first preset the time open each auxiliary switch pipe, after each main switch is opened, the 2nd presets the time, closes each auxiliary switch pipe.
According to, in circuit control method of the present invention, the described first default time met following formula:
T1 >=I �� Lr/U;
Wherein, U is the bus voltage of described bus capacitor, and I is the input peak point current of circuit, and Lr is the inductance sense amount of described resonant inductance.
Present invention also offers a kind of uninterruptible power supply, comprise foregoing Sofe Switch auxiliary circuit, or two-phase input pfc circuit, or three-phase input pfc circuit.
Sofe Switch auxiliary circuit, the two-phase of implementing the present invention input pfc circuit, three-phase input pfc circuit and control method thereof and uninterruptible power supply, there is following useful effect: the present invention is by sharing auxiliary switch pipe and resonant inductance, ensure soft open effect while effectively save the quantity of auxiliary switch pipe and resonant inductance, reduce system complexity, it is to increase reliability.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is a kind of typical soft switch circuit in prior art;
Fig. 2 is a kind of typical two-phase input pfc circuit in prior art;
Fig. 3 is a kind of typical three-phase input pfc circuit in prior art;
Fig. 4 A-4B is the first embodiment of the Sofe Switch auxiliary circuit according to the present invention and the schematic circuit of the 2nd embodiment;
Fig. 5 A-5B is the 3rd embodiment of the Sofe Switch auxiliary circuit according to the present invention and the schematic circuit of the 4th embodiment;
Fig. 6 is the schematic circuit of the first embodiment of the input pfc circuit of the two-phase according to the present invention;
Fig. 7 is the schematic circuit of the first embodiment of the input pfc circuit of the three-phase according to the present invention;
Fig. 8 A-8B is the 5th embodiment of the Sofe Switch auxiliary circuit according to the present invention and the schematic circuit of the 6th embodiment;
Fig. 9 A-9B is the 7th embodiment of the Sofe Switch auxiliary circuit according to the present invention and the schematic circuit of the 8th embodiment;
Figure 10 is the schematic circuit of the 2nd embodiment of the input pfc circuit of the three-phase according to the present invention;
Figure 11 is the schematic circuit of the 3rd embodiment of the input pfc circuit of the three-phase according to the present invention;
Figure 12 is the Control timing sequence figure of the input pfc circuit of the three-phase according to the present invention.
Embodiment
In order to make the object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.
The present invention provides a kind of Sofe Switch auxiliary circuit, comprising: auxiliary switch pipe, resonant inductance, the 2nd diode and n the first diode;Wherein n be greater than 1 integer. This Sofe Switch auxiliary circuit has first end to the n-th+2 end. Wherein, the first end of n the first diode is connected with first end to the n-th end of Sofe Switch auxiliary circuit respectively, 2nd end of n the first diode is connected to the first end of resonant inductance jointly, 2nd end of resonant inductance is connected to the (n+1)th end of Sofe Switch auxiliary circuit by the 2nd diode, and the 2nd end of resonant inductance is also connected with the n-th+2 end of Sofe Switch auxiliary circuit by auxiliary switch pipe.
This Sofe Switch auxiliary circuit can typically be applied to n phase and input pfc circuit. This n phase input pfc circuit comprise just to boost circuit is identical with structure with it but contrary the bearing to boost circuit of the sense of current. This is just comprising a bus capacitor and n group main inductance, main switch, the 5th diode and the 6th diode to boost circuit. Just connected the current input terminal of respective main switch respectively by the main inductance connected successively separately and the 5th diode to the 1-n phase input terminus of boost circuit, the current input terminal of main switch also connects the positive pole of bus capacitor through the 6th respective diode, and the negative pole of the electric current output terminal of n main switch and bus capacitor is all connected to zero line side. This just all may further include an aforesaid Sofe Switch auxiliary circuit with bearing to boost circuit to boost circuit, wherein, just it is connected to the current input terminal of n main switch respectively to first end to the n-th end of Sofe Switch auxiliary circuit in boost circuit, (n+1)th end of Sofe Switch auxiliary circuit is connected to the positive pole of bus capacitor, and the n-th+2 end of Sofe Switch auxiliary circuit is connected to zero line side. Bear in boost circuit Sofe Switch auxiliary circuit with just to the structure of Sofe Switch auxiliary circuit in boost circuit is identical but the sense of current is contrary. One end of electric current input main switch when current input terminal of the main switch in the present invention refers to the external normal operation except control end. One end of outflow of bus current main switch when the electric current output terminal of main switch refers to the external normal operation except control end.
As shown in Figure 4 A, it is the schematic circuit of the first embodiment of the Sofe Switch auxiliary circuit according to the present invention. In this first embodiment, n is 2, typically can be applicable to two-phase input pfc circuit just in boost circuit. As shown in Figure 4 A, this Sofe Switch auxiliary circuit comprises auxiliary switch pipe Q21 and resonance inductance L r1, and the 2nd diode is such as diode D21, and 2 the first diodes are such as diode D11 and diode D12. The first end of this Sofe Switch auxiliary circuit is A1 end, and the 2nd end is B1 end, and the 3rd end is BUS+ end, and the 4th end is zero line side and N end. Concrete connection relation is as shown in the figure, the first end of diode D11 and diode D12 such as anode respectively A1 end and B1 end with Sofe Switch auxiliary circuit be connected, 2nd end of diode D11 and diode D12 such as negative electrode is connected to the first end of resonant inductance Lr1 jointly, 2nd end of resonant inductance Lr1 by just to diode D21 be connected to BUS+ end, the 2nd end of resonant inductance Lr1 is also connected with N end by auxiliary switch pipe Q21.
As shown in Figure 4 B, it is the schematic circuit of the 2nd embodiment of the Sofe Switch auxiliary circuit according to the present invention. In 2nd embodiment, n is 2, typically can be applicable to two-phase input the bearing in boost circuit of pfc circuit. As shown in Figure 4 B, this Sofe Switch auxiliary circuit comprises auxiliary switch pipe Q24 and resonance inductance L r4, and the 2nd diode is such as diode D24, and 2 the first diodes, such as diode D14 and diode D15.The first end of this Sofe Switch auxiliary circuit is A2 end, and the 2nd end is B2 end, and the 3rd end is BUS-end, and the 4th end is N end. Concrete connection relation is as shown in the figure, the first end of diode D14 and diode D15 such as negative electrode respectively A2 end and B2 end with Sofe Switch auxiliary circuit be connected, 2nd end of diode D14 and diode D15 such as anode is connected to the first end of resonant inductance Lr4 jointly, 2nd end of resonant inductance Lr4 is connected to BUS-end by reverse diode D24, and the 2nd end of resonant inductance Lr4 is also connected with N end by auxiliary switch pipe Q24.
As shown in Figure 5A, it is the schematic circuit of the 3rd embodiment of the Sofe Switch auxiliary circuit according to the present invention. In 3rd embodiment, n is 3, typically can be applicable to three-phase input pfc circuit just in boost circuit. As shown in Figure 5A, this Sofe Switch auxiliary circuit comprises auxiliary switch pipe Q21 and resonance inductance L r1, and the 2nd diode, such as diode D21 and 3 the first diode, such as diode D11-D13. The first end of this Sofe Switch auxiliary circuit is A1 end, and the 2nd end is B1 end, and the 3rd end is C1 end, and the 4th end is BUS+ end, and the 5th end is zero line side and N end.
As shown in Figure 5 B, it is the schematic circuit of the 4th embodiment of the Sofe Switch auxiliary circuit according to the present invention. In 4th embodiment, n is 3, typically can be applicable to three-phase input the bearing in boost circuit of pfc circuit. As shown in Figure 5 B, this Sofe Switch auxiliary circuit comprises auxiliary switch pipe Q24 and resonance inductance L r4, and the 2nd diode is such as diode D24, and 3 the first diodes, such as diode D14-D16. The first end of this Sofe Switch auxiliary circuit is A2 end, and the 2nd end is B2 end, and the 2nd end is C2 end, and the 4th end is BUS-end, and the 5th end is N end.
As shown in Figure 6, the schematic circuit of the first embodiment of pfc circuit is inputted for the two-phase according to the present invention. As shown in Figure 6, this two-phase input pfc circuit, comprise just to boost circuit is identical with structure with it but contrary the bearing to boost circuit of the sense of current. This is just comprising a bus capacitor and two groups of main inductances, main switch, the 5th diode and the 6th diode to boost circuit. Just connected the current input terminal of respective main switch respectively by the main inductance connected successively separately and the 5th switching tube to the A phase input terminus of boost circuit and B phase input terminus, the current input terminal of main switch also connects the positive pole of bus capacitor through the 6th respective diode, and the negative pole of the electric current output terminal of two groups of main switches and bus capacitor is all connected to zero line side. Specifically, this just comprises bus capacitor C1 to boost circuit, and 2 main inductances are if inductance L 1, L2,2 main switch are if Q11, Q12,2 the 5th diode is such as diode D51, D52, and 2 the 6th diodes are such as diode D61, D62. This just also comprises Sofe Switch auxiliary circuit as shown in Figure 4 A to boost circuit, and it is connected with bus capacitor C1 and 2 main switch such as Q11, Q12. Wherein in Fig. 4 A, A1 end connects the current input terminal of main switch Q11, and B1 end connects the current input terminal of main switch Q12, and BUS+ end then connects the positive pole of bus capacitor C1. Fig. 6 bears and then comprises the Sofe Switch auxiliary circuit shown in Fig. 4 B to boost circuit. Wherein in Fig. 4 B, A2 end connects the electric current output terminal of main switch Q14, and B2 end connects the electric current output terminal of main switch Q14, and BUS-end then connects the negative pole of bus capacitor C2. Bear in boost circuit Sofe Switch auxiliary circuit with just to the structure of Sofe Switch auxiliary circuit in boost circuit is identical but the sense of current is contrary.
As shown in Figure 6, utilize the Sofe Switch auxiliary circuit shown in Fig. 4 A or 4B to achieve single auxiliary switch pipe simultaneously to two soft effects opened of main switch, and only need a resonant inductance.
As shown in Figure 7, the schematic circuit of the first embodiment of pfc circuit is inputted for the three-phase according to the present invention. As shown in Figure 7, this three-phase input pfc circuit, comprise just to boost circuit is identical with structure with it but contrary the bearing to boost circuit of the sense of current. This is just comprising a bus capacitor and three groups of main inductances, main switch, the 5th diode and the 6th diode to boost circuit. Just connected the current input terminal of respective main switch respectively by the main inductance connected successively separately and the 5th switching tube to the A phase input terminus of boost circuit, B phase input terminus and C phase input terminus, the current input terminal of main switch also connects the positive pole of bus capacitor through the 6th respective diode, and the negative pole of the electric current output terminal of two groups of main switches and bus capacitor is all connected to zero line side. Specifically, this just comprises bus capacitor C1 to boost circuit, and 3 main inductances are if inductance L 1-L3,3 main switch is if Q11-13,3 the 5th diode is such as diode D51-D53, and 3 the 6th diodes are such as diode D61-D63. This just also comprises Sofe Switch auxiliary circuit as shown in Figure 5 A to boost circuit, and it is connected with bus capacitor C1 and 3 main switch such as Q11-Q13. Wherein in Fig. 5 A, A1 end connects the current input terminal of main switch Q11, and B1 end connects the current input terminal of main switch Q12, and C1 end connects the current input terminal of main switch Q13, and BUS+ end then connects the positive pole of bus capacitor C1. Fig. 6 bears and then comprises the Sofe Switch auxiliary circuit shown in Fig. 5 B to boost circuit. Wherein in Fig. 5 B, A2 end connects the electric current output terminal of main switch Q14, and B2 end connects the electric current output terminal of main switch Q14, and C2 end connects the electric current output terminal of main switch Q16, and BUS-end then connects the negative pole of bus capacitor C2. Bear in boost circuit Sofe Switch auxiliary circuit then with just to the structure of Sofe Switch auxiliary circuit in boost circuit is identical but the sense of current is contrary.
Just the Sofe Switch principle of the present invention is described to boost. Assume that A phase and B phase are at positive half cycle, C phase is when negative half cycle state, first opening switch pipe Q21, continue the t1 moment, opening switch pipe Q11 and Q12 again, due to the existence of resonant inductance Lr1, di/dt is controlled, the Reverse recovery electric current of diode D51 and D52 is very little, reduces the turn-on consumption of main switch and the reverse recovery loss of diode. As shown in Figure 7, utilize the Sofe Switch auxiliary circuit shown in Fig. 5 A or 5B to achieve single auxiliary switch pipe simultaneously to three soft effects opened of main switch, and only need a resonant inductance.
The Sofe Switch auxiliary circuit of the present invention can also increase the soft switching effect that resonant capacitance realizes main switch and auxiliary switch pipe, also needs to increase diode-isolated for this reason, avoids multiple resonant capacitance directly to connect. Therefore, in another preferred embodiment of the present invention, the Sofe Switch auxiliary circuit of the present invention also comprises: N number of resonant capacitance, N group the 3rd diode and the 4th diode; And Sofe Switch auxiliary circuit also has N+3 end to 2N+2 end. The 3rd diode and the 4th diode series aiding connection often organized in N group the 3rd diode and the 4th diode are connected between the 2nd end of resonant inductance and the N+1 end of Sofe Switch auxiliary circuit together afterwards;Often organize the node between the 3rd diode and the 4th diode by a resonant capacitance respectively N+3 end with Sofe Switch auxiliary circuit be connected to 2N+2 end. In the preferred embodiment, when adding N number of resonant capacitance, after N group the 3rd diode and the 4th diode, the 2nd diode becomes optional device.
As shown in Figure 8 A, it is the schematic circuit of the 5th embodiment of the Sofe Switch auxiliary circuit according to the present invention. As shown in Figure 8 A, this embodiment adds 2 resonant capacitances and Cr1, Cr2,2 the 3rd diode and diode D31, D32,2 the 4th diode and diode D41, D42 on the basis of Fig. 4 A. In Fig. 4 A, the 2nd diode such as diode D21 becomes optional diode. This Sofe Switch auxiliary circuit also has the 5th end and the 6th end, is respectively A3 end and B3 end. When be applied in two-phase input pfc circuit just in boost circuit time, A3 end and B3 end are directly coupled with main switch.
As shown in Figure 8 B, it is the schematic circuit of the 6th embodiment of the Sofe Switch auxiliary circuit according to the present invention. As shown in Figure 8 B, this embodiment adds 2 resonant capacitances and Cr4, Cr5,2 the 3rd diode and diode D34, D35,2 the 4th diode and diode D44, D45 on the basis of Fig. 4 B. In Fig. 4 B, the 2nd diode such as diode D24 becomes optional diode. This Sofe Switch auxiliary circuit also has the 5th end and the 6th end, is respectively A4 end and B4 end. When being applied in two-phase when bearing in boost circuit of pfc circuit of input, A4 end and B4 end are directly coupled with main switch. The present invention is the corresponding two-phase input pfc circuit providing the Sofe Switch auxiliary circuit containing Fig. 8 A and Fig. 8 B also, this two-phase input pfc circuit just in boost circuit, A3 end and B3 end can be connected to two main switches respectively such as the current input terminal of switching tube Q11 and Q12, bearing to, in boost circuit, A4 end and B4 end can be connected to two main switches respectively such as the electric current output terminal of switching tube Q14 and Q15 of this two-phase input pfc circuit.
As shown in Figure 9 A, it is the schematic circuit of the 7th embodiment of the Sofe Switch auxiliary circuit according to the present invention. As shown in Figure 9 A, this embodiment adds 3 resonant capacitances and Cr1-Cr3,3 the 3rd diode and diode D31-D33,3 the 4th diode and diode D41-D43 on the basis of Fig. 5 A. In Fig. 5 A, the 2nd diode such as diode D21 becomes optional diode. This Sofe Switch auxiliary circuit also has the 6th end to the 8th end, is respectively A3 end, B3 end and C3 end. When be applied in three-phase input pfc circuit just in boost circuit time, A3 end, B3 end and C3 end are directly coupled with main switch respectively. Correspondingly, present invention also offers a kind of Sofe Switch auxiliary circuit, identical with the circuit structure in Fig. 9 A but the sense of current is contrary. The present invention is also corresponding to be provided containing the Sofe Switch auxiliary circuit in Fig. 9 A and but the three-phase of circuit that the sense of current contrary input pfc circuit identical with its structure, just in boost circuit, A3 end, B3 end and C3 end can be connected to three main switches respectively such as the current input terminal of switching tube Q11, Q12 and Q13, bearing to, in the Sofe Switch auxiliary circuit of boost circuit, the port forming mirror image with A3 end, B3 end and C3 end can be connected to three main switches respectively such as the electric current output terminal of switching tube Q14, Q15 and Q16.
As shown in Figure 9 B, it is the schematic circuit of the 8th embodiment of the Sofe Switch auxiliary circuit according to the present invention.As shown in Figure 9 B, this embodiment add on the basis of Fig. 9 A one just to the 2nd diode being connected between the 2nd end of resonant inductance Lr1 and bus capacitor C1 such as diode D24. Its objective is to improve the efficiency being delivered to bus in big current situation by the electric current of resonant inductance Lr1, namely it is transformed to an independent diode from two diode series connection. Correspondingly, present invention provides a kind of three-phase input pfc circuit, comprise that structure is identical but the sense of current is contrary just to boost circuit with bear to boost circuit, it just comprises the Sofe Switch auxiliary circuit shown in Fig. 9 B to boost circuit, and bears and comprise identical with the Sofe Switch auxiliary circuit structure shown in Fig. 9 B but that the sense of current is contrary Sofe Switch auxiliary circuit to boost circuit.
Refer to Figure 10, it is the schematic circuit of the 2nd embodiment of the three-phase input pfc circuit according to the present invention. As shown in Figure 10, the three-phase input pfc circuit of this embodiment is for there being bridge PFC circuits. This three-phase input pfc circuit in boost circuit, just make use of the Sofe Switch auxiliary circuit shown in Fig. 9 A, it is connected with bus capacitor C1 and 3 main switch such as Q11-Q13. Wherein in Fig. 9 A, A1 end and A3 end all connect the current input terminal of main switch Q11, B1 end and B3 end all connect the current input terminal of main switch Q12, C1 end and C3 end all connect the current input terminal of main switch Q13, and BUS+ end then connects the positive pole of bus capacitor C1. Resonant capacitance Cr1-Cr3 is for ensureing the soft switching effect of auxiliary switch and main switch. Equally, this three-phase input bearing of pfc circuit in boost circuit, also comprise a Sofe Switch auxiliary circuit, its with just to the structure of the Sofe Switch auxiliary circuit in boost circuit is identical but the sense of current is contrary.
Just the Sofe Switch principle of the present invention is described to boost. Assume that A phase and B phase are at positive half cycle, C phase is when negative half cycle state, first opening switch pipe Q21, continue the t1 moment, opening switch pipe Q11 and Q12 again, due to the existence of resonant inductance Lr1, di/dt is controlled, the Reverse recovery electric current of diode D51 and D52 is very little, reduces the turn-on consumption of main switch and the reverse recovery loss of diode. After switching tube Q11 and Q12 opens time period for some time t2, closing switching tube Q21, the energy on resonant inductance Lr1 stores to resonant capacitance Cr1 and Cr2. Owing to resonant capacitance one end is connected with main switch, main switch is opened this moment, therefore one end of resonant capacitance by embedding position at zero line current potential. If resonant inductance and resonance capacitance selection are proper, the voltage of resonant capacitance can be charged to equal with bus voltage. When each main switch Q11 and Q12 turns off the moment, by resonant capacitance and D41 and D42 by the embedding position of bus, its shutoff voltage is started from scratch rising, it is achieved that the soft switching of main switch.
Refer to Figure 11, it is the schematic circuit of the 3rd embodiment of the three-phase input pfc circuit according to the present invention. As shown in figure 11, the three-phase input pfc circuit of this embodiment is non-bridge PFC circuits. This three-phase input pfc circuit comprise just to boost circuit is identical with structure with it but contrary the bearing to boost circuit of the sense of current. This is just comprising a bus capacitor and three groups of main inductances, main switch, the 7th diode and the 8th diode to boost circuit. Just connected the current input terminal of respective main switch respectively by the main inductance connected successively separately and the 8th switching tube to the A phase input terminus of boost circuit, B phase input terminus and C phase input terminus, node between main inductance and the 8th switching tube also connects the positive pole of bus capacitor through the 7th respective diode, and the negative pole of the electric current output terminal of two groups of main switches and bus capacitor is all connected to zero line side. Specifically, this just comprises bus capacitor C1 to boost circuit, and 3 main inductances are if inductance L 1-L3,3 main switch is if switching tube Q11-Q13,3 the 7th diode is such as diode D71-D73, and 3 the 8th diodes are such as diode D81-D83.This three-phase input pfc circuit in boost circuit, just make use of the Sofe Switch auxiliary circuit shown in Fig. 9 A, it is connected with bus capacitor C1 and 3 main switch such as Q11-Q13. Wherein in Fig. 9 A, A1, B1 and C1 end is connected to the 8th diode respectively such as the anode of diode D81-D83, and A3, B3 and C3 end connects main switch respectively such as the current input terminal of switching tube Q11-Q13, and BUS+ end then connects the positive pole of bus capacitor C1. Resonant capacitance Cr1-Cr3 is for ensureing the soft switching effect of auxiliary switch and main switch. Equally, this three-phase input bearing of pfc circuit in boost circuit, also include a Sofe Switch auxiliary circuit, its with just to the Sofe Switch auxiliary circuit structure in boost circuit is identical but the sense of current is contrary.
Present invention also offers aforementioned two-phase input pfc circuit or the control method of three-phase input pfc circuit, namely in circuit the control signal positive rise of each main switch to it, and the first preset time t 1 opens each auxiliary switch pipe before the unlatching of each main switch, the 2nd preset time t 2 after each main switch is opened, closes each auxiliary switch pipe. It is described for the three-phase input pfc circuit of Fig. 7 below. It is the Control timing sequence figure of the three-phase input pfc circuit of the present invention as shown in figure 12. As, in the sequential control method of figure, each main switch is if the positive rise of Q11-Q13 is to it, and negative edge controls gained automatically according to system, and auxiliary switch pipe such as opening of Q21 needs the t1 time period in advance. Namely first opening auxiliary switch pipe such as Q21 and continue the t1 time, each main switch of rear unlatching, such as Q11-Q13, closes auxiliary switch pipe Q21 after the t2 time period after opening.
Wherein the first preset time t 1 meets following formula: t1 >=I �� Lr/U;
Wherein, U is the bus voltage of bus capacitor, and I is the input peak point current of circuit, and Lr is the inductance sense amount of resonant inductance.
As long as just can close auxiliary switch pipe after each main switch is all opened, therefore the value of the 2nd preset time t 2 can be smaller, and in order to ensure effect, generally t2 value is less than 5us for being greater than 100ns. Certain switching frequency is more high, and the time of the 2nd preset time t 2 is more short.
Present invention also offers a kind of uninterruptible power supply (UPS), it comprises foregoing Sofe Switch auxiliary circuit or two-phase input pfc circuit or three-phase and inputs pfc circuit.
Although Sofe Switch auxiliary circuit provided by the invention is particularly useful for being selected by the quantity of diode, carry out multiple boost circuit Sofe Switch auxiliary circuit share, be also suitable for being applied in pfc circuit occasion; But the present invention is not limited thereto, this Sofe Switch auxiliary circuit can be applied in various occasion to save the circuit of component number by this area basic technology personnel as required, and this application all should fall within the scope of protection of the present invention.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not departing from the scope of the invention, can carry out various change and equivalent replacement. In addition, for adapting to specific occasion or the material of the technology of the present invention, the present invention can be carried out many amendments and do not depart from its protection domain. Therefore, it is intended that the invention not be limited to specific embodiment disclosed herein, and comprise all embodiments dropping into claims.
Claims (13)
1. a Sofe Switch auxiliary circuit, it is characterised in that, comprising: auxiliary switch pipe, resonant inductance, the 2nd diode and n the first diode; Wherein n be greater than 1 integer;Described Sofe Switch auxiliary circuit has first end to the n-th+2 end;
The first end of described n the first diode is connected with first end to the n-th end of Sofe Switch auxiliary circuit respectively, 2nd end of described n the first diode is connected to the first end of described resonant inductance jointly, 2nd end of described resonant inductance is connected to the (n+1)th end of described Sofe Switch auxiliary circuit by described 2nd diode, and the 2nd end of described resonant inductance is also connected with the n-th+2 end of Sofe Switch auxiliary circuit by described auxiliary switch pipe.
2. Sofe Switch auxiliary circuit according to claim 1, it is characterised in that, described Sofe Switch auxiliary circuit also comprises: n resonant capacitance, n group the 3rd diode and the 4th diode; And described Sofe Switch auxiliary circuit also has the n-th+3 end to 2n+2 end;
It is connected between the 2nd end of described resonant inductance and the (n+1)th end of described Sofe Switch auxiliary circuit after the 3rd diode often organized in described n group the 3rd diode and the 4th diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to 2n+2 end with the n-th+3 end of Sofe Switch auxiliary circuit respectively by a resonant capacitance.
3. a Sofe Switch auxiliary circuit, it is characterised in that, comprising: auxiliary switch pipe, resonant inductance, n the first diode, n resonant capacitance and n group the 3rd diode and the 4th diode; Wherein n be greater than 1 integer; Described Sofe Switch auxiliary circuit has first end to 2n+2 end;
The first end of described n the first diode is connected with first end to the n-th end of Sofe Switch auxiliary circuit respectively, 2nd end of described n the first diode is connected to the first end of described resonant inductance jointly, and the 2nd end of described resonant inductance is connected with the n-th+2 end of Sofe Switch auxiliary circuit by described auxiliary switch pipe;
It is connected between the 2nd end of described resonant inductance and the (n+1)th end of described Sofe Switch auxiliary circuit after the 3rd diode often organized in described n group the 3rd diode and the 4th diode and the 4th diode series aiding connection; And often group the 3rd diode and the 4th diode intermediate node are connected to 2n+2 end with the n-th+3 end of Sofe Switch auxiliary circuit respectively by a resonant capacitance.
4. a two-phase input pfc circuit, comprises just to boost circuit and bear to boost circuit; Described just all have a bus capacitor and two main switches to boost circuit with bearing in boost circuit; It is characterized in that: described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, the 2nd diode and two the first diodes;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe, and the 2nd end of resonant inductance by just to the 2nd diode be connected to the positive pole of bus capacitor;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, 2nd end of resonant inductance is connected by the current input terminal of auxiliary switch pipe with described main switch, and the 2nd end of resonant inductance is connected to the negative pole of bus capacitor by the 2nd reverse diode.
5. two-phase according to claim 4 input pfc circuit, it is characterised in that, described Sofe Switch auxiliary circuit also comprises: two resonant capacitances, two group of the 3rd diode and the 4th diode;
Described just in boost circuit: just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to just to the current input terminal of each main switch in boost circuit by a resonant capacitance respectively;
Described bear in boost circuit: often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
6. a two-phase input pfc circuit, comprises just to boost circuit and bear to boost circuit; Described just all have a bus capacitor and two main switches to boost circuit with bearing in boost circuit; It is characterized in that, described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, two the first diodes, two resonant capacitances, and two group of the 3rd diode and the 4th diode;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, the 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe; Just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after the 3rd diode often organized and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, and the 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe; And often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
7. a three-phase input pfc circuit, comprises just to boost circuit and bear to boost circuit; Described just all have a bus capacitor and three main switches to boost circuit with bearing in boost circuit; It is characterized in that, described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, the 2nd diode and three the first diodes;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe, and the 2nd end of resonant inductance by just to the 2nd diode be connected to the positive pole of bus capacitor;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe, and the 2nd end of resonant inductance is connected to the negative pole of bus capacitor by the 2nd reverse diode.
8. three-phase according to claim 7 input pfc circuit, it is characterised in that, described Sofe Switch auxiliary circuit also comprises: three resonant capacitances, three group of the 3rd diode and the 4th diode;
Described just in boost circuit: just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: often organize the 3rd diode and the 4th diode series aiding connection together after Opposite direction connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
9. a three-phase input pfc circuit, comprises just to boost circuit and bear to boost circuit; Described just all have a bus capacitor and three main switches to boost circuit with bearing in boost circuit; It is characterized in that, described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, three the first diodes, three resonant capacitances, and three group of the 3rd diode and the 4th diode;
Described just in boost circuit: the current input terminal of each main switch respectively by one just to the first diode be connected to the first end of resonant inductance, the 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe; Just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: the electric current output terminal of each main switch is connected to the first end of resonant inductance respectively by a first reverse diode, and the 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe; And often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
10. a three-phase input pfc circuit, comprises just to boost circuit and bear to boost circuit; Described just all have a bus capacitor and three main switches, the described main inductance being just connected to every phase to the current input terminal of each main switch in boost circuit by a 8th reverse diode to boost circuit with bearing in boost circuit; The electric current output terminal bearing each main switch in boost circuit by one just to the 8th diode be connected to the main inductance of every phase; It is characterized in that, described just to boost circuit with bear and comprise a Sofe Switch auxiliary circuit all further to boost circuit; Described Sofe Switch auxiliary circuit comprises: an auxiliary switch pipe, a resonant inductance, three the first diodes, three resonant capacitances, and three group of the 3rd diode and the 4th diode;
Described just in boost circuit: the first end of resonant inductance is connected to the anode of each the 8th diode respectively by a first reverse diode, and the 2nd end of resonant inductance is connected with the electric current output terminal of main switch by auxiliary switch pipe;Just to being connected to the 2nd between end and the positive pole of bus capacitor of resonant inductance after often organizing the 3rd diode and the 4th diode series aiding connection; Often group the 3rd diode and the 4th diode intermediate node are connected to described just to the current input terminal of each main switch in boost circuit respectively by a resonant capacitance;
Described bear in boost circuit: the first end of resonant inductance respectively by one just to the first diode be connected to the anode of each the 8th diode, the 2nd end of resonant inductance is connected with the current input terminal of main switch by auxiliary switch pipe; And often organize Opposite direction connection after the 3rd diode and the 4th diode series aiding connection at the 2nd between end and the negative pole of bus capacitor of resonant inductance; Often group the 3rd diode and the 4th diode intermediate node are connected to the described electric current output terminal bearing each main switch in boost circuit respectively by a resonant capacitance.
11. 1 kinds of circuit control methods, it is characterized in that, the two-phase being applicable in claim 4-10 described in any one inputs pfc circuit or three-phase input pfc circuit, the control signal rising edge alignment of each main switch in described circuit, and before the unlatching of each main switch first preset the time open each auxiliary switch pipe, after each main switch is opened, the 2nd presets the time, closes each auxiliary switch pipe.
12. circuit control methods according to claim 11, it is characterised in that, the described first default time met following formula:
T1 >=I �� Lr/U;
Wherein, U is the bus voltage of bus capacitor, and I is the input peak point current of circuit, and Lr is the inductance sense amount of described resonant inductance.
13. 1 kinds of uninterruptible power supplys, it is characterized in that, comprise the Sofe Switch auxiliary circuit described in any one in claim 1-3, or in claim 4-6 described in any one two-phase input pfc circuit, or in claim 7-10 described in any one three-phase input pfc circuit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155819A (en) * | 2017-12-12 | 2018-06-12 | 佛山市洛克威特科技有限公司 | A kind of AC/DC converters for reducing input current abnormality |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317865A (en) * | 2001-05-16 | 2001-10-17 | 深圳市安圣电气有限公司 | Dual-unit step-up switch converter |
| US20050024023A1 (en) * | 2003-07-28 | 2005-02-03 | Delta-Electronics Inc. | Soft-switching three-phase power factor correction converter |
| US20120069615A1 (en) * | 2010-09-21 | 2012-03-22 | Tdk Corporation | Bridgeless power factor correction converter |
| CN102684472A (en) * | 2012-04-26 | 2012-09-19 | 华为技术有限公司 | Three-phase power factor correction circuit device |
| TW201414149A (en) * | 2012-09-18 | 2014-04-01 | Nat Univ Chin Yi Technology | High voltage ratio interleaved converter with soft-switching |
-
2014
- 2014-11-17 CN CN201410654481.8A patent/CN105656296B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317865A (en) * | 2001-05-16 | 2001-10-17 | 深圳市安圣电气有限公司 | Dual-unit step-up switch converter |
| US20050024023A1 (en) * | 2003-07-28 | 2005-02-03 | Delta-Electronics Inc. | Soft-switching three-phase power factor correction converter |
| US20120069615A1 (en) * | 2010-09-21 | 2012-03-22 | Tdk Corporation | Bridgeless power factor correction converter |
| CN102684472A (en) * | 2012-04-26 | 2012-09-19 | 华为技术有限公司 | Three-phase power factor correction circuit device |
| TW201414149A (en) * | 2012-09-18 | 2014-04-01 | Nat Univ Chin Yi Technology | High voltage ratio interleaved converter with soft-switching |
Non-Patent Citations (1)
| Title |
|---|
| HENRIQUE A. C. BRAGA ET AL.: "A 3-kW Unity-Power-Factor Rectifier Based on a Two-Cell Boost Converter Using a New Parallel-Connection Technique", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155819A (en) * | 2017-12-12 | 2018-06-12 | 佛山市洛克威特科技有限公司 | A kind of AC/DC converters for reducing input current abnormality |
| CN108155819B (en) * | 2017-12-12 | 2020-09-29 | 三门县瑶帆自动化科技有限公司 | AC/DC converter for reducing input current distortion |
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|---|---|
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