CN1556580B

CN1556580B - DC/DC Switching Converter Using Integrated Magnetic Parts Without DC Bias

Info

Publication number: CN1556580B
Application number: CN 200410021028
Authority: CN
Inventors: 杨玉岗
Original assignee: Individual
Current assignee: Liaoning Technical University
Priority date: 2004-01-07
Filing date: 2004-01-07
Publication date: 2010-08-04
Anticipated expiration: 2024-01-07
Also published as: CN1556580A

Abstract

The invention relates to a DC/DC switch converter using a direct current-less magnetic biasing integrated magnetic element, the converter is connected in parallel with two channels, the inductances on the two branches are integrated on a iron core, forms a integrated magnetic element, the switch frequency of the two branches are the same, the duty ratios of the working pulse are the same. The difference of conducting time is within a period. When the switch of one branch is conducted, when the power transmitted from the direct current power passes the windings of the branch, the power is transmitted to the load with another winding directly with magnetism coupling method, the direct current magnetic biasing generated in the iron core by the current passing the two windings is equal, the direction is reverse. The iron core has not air aperture, the converter is small, weight, high efficient, strong overloading ability, it can decrease the electromagnetic interference and the current ripples of input and output current, the dynamic response speed is quick, which can be applied to switch power with low voltage and large current.

Description

Adopt the DC/DC switch converters of non DC bias integrated magnetics

Technical field

The present invention relates to a kind of DC/DC (DC-DC) switch converters, especially relate to a kind of DC/DC switch converters that adopts the non DC bias integrated magnetics.

Technical background

Current, an important development trend of direct-current switch power supply is to realize " light, thin, short, little " and high efficiency, and the core of direct-current switch power supply is power electronics DC/DC (DC-DC) switch converters.In various DC/DC switch converters, the input filter inductor is generally all arranged, output inductor device or energy-storage reactor, in order to transmit and store direct current power, generally all flow through bigger dc bias current in these inductors, cause producing in the iron core of these inductors bigger D.C. magnetic biasing, in order to prevent that D.C. magnetic biasing from causing the magnetic saturation of inductor iron core, in the iron circuit of these inductors, generally all open an air gap that is directly proportional with the size of dc bias current, the result makes that the utilance of inductor iron core is very low, inductance value reduces greatly, in order to remedy this loss of inductance value, people usually adopt the way (being unfavorable for very much reducing of inductor and Switching Power Supply volume) that increases inductor core volume or umber of turn, and the result makes the DC/DC switch converters be difficult to realize " light; thin; short; little "; In addition, because the operating frequency all very high (more than tens kHz) of these inductors, the inductor that makes these iron cores open air gap has produced bigger leakage electromagnetic field and high frequency radiation electromagnetic interference, leakage electromagnetic field causes the eddy current loss of inductor winding, makes the DC/DC switch converters be difficult to realize high efficiency; The high frequency radiation electromagnetic interference not only influences the operate as normal of converter circuit self, also can enter electrical network, pollutes electromagnetic environment, the normal operation that endangers other electronic equipments.Therefore, must take measures to eliminate D.C. magnetic biasing and air gap in these inductors.

In the past, people once added permanent magnetic material and eliminated D.C. magnetic biasing in iron circuit, but owing to cost, loss and the air gap of permanent magnet causes reasons such as inductance value reduction, made this way unworkable.

Another trial is to adopt special transformer configuration to reduce or eliminate D.C. magnetic biasing.As United States Patent (USP) " compensate for electronic the power inverter " (patent No.: US5,166,869) introduce in by " compensator transformer ", this compensator transformer is combined into a coupling inductance to input inductance and outputting inductance, direct current flux in its input inductance is output the direct current flux that inductance produces and eliminates, its major defect is to eliminate D.C. magnetic biasing under a certain fixing input/output voltage no-load voltage ratio, this no-load voltage ratio is determined by the securing loop ratio of these two windings, and can not under variable input/output voltage no-load voltage ratio, eliminate D.C. magnetic biasing, promptly can not all eliminate D.C. magnetic biasing when any duty ratio by the pulse-width modulation method.Note the different of coupling inductance and transformer device structure: in coupling inductance, when the transient current of input inductance flowed into end of the same name, the transient current of outputting inductance also flowed into end of the same name, and in AC transformer, output current is to flow out end of the same name.The major advantage of coupling inductance is to reduce the output ripple electric current, even can realize exporting zero ripple current.

U.S. Pat 6,400,579 (authorize day: 2002.10.9) be winding added in the Cuk converter in the middle of, input and output inductance winding in winding in the middle of this and the Cuk converter is integrated on the iron core, can when any duty ratio, eliminates the D.C. magnetic biasing in the iron core, make iron core need not open air gap, the inventor is called commutator transformer, the result reduces the volume and weight of converter, and efficient improves, and has high overload capacity (be nominal load current more than 20 times).The shortcoming of this integrated magnetics and circuit structure is the circuit complexity, self-turn-off device many (four), winding (causing the winding resistance loss) in the middle of additionally having added one, and only be applicable to this a kind of converter of Cuk converter, and can not be applicable to various DC/DC converters at present commonly used (as Buck, Boost, Buck/Boost, Zeta, Sepic, normal shock, instead swash or the like).

Summary of the invention

The present invention presses above technical deficiency in order to overcome, and provides a kind of and implement conveniently, can eliminate when any duty ratio the DC/DC switch converters of D.C. magnetic biasing and air gap in filter inductor and the energy-storage reactor.The volume of converter is reduced, weight saving, and the dynamic responding speed of converter is accelerated greatly, the output ripple electric current reduces, overload capacity strengthens, and the eddy current loss of inductor winding reduces greatly, and the electromagnetic interference of generation reduces greatly, current stress reduces, for " light, thin, short, little " and the high efficiency that realizes Switching Power Supply provides the theory and technology support.Simultaneously, this DC/DC converter also is highly suitable for the switch converters of low-voltage and high-current output, and goes for comprising the DC/DC converter aforesaid various commonly used of Cuk converter.

The technical solution adopted for the present invention to solve the technical problems is: will adopt the DC/DC converter of non DC bias integrated magnetics to carry out the two-way parallel connection, first inductor L1 on this article one parallel branch and the second inductor L2 on the second parallel branch are integrated on the iron core, form the first integrated magnetics IM1 of a non DC bias, allow wherein the winding current on the parallel branch flow into end of the same name, allow the winding current on another parallel branch wherein flow out end of the same name, the switching frequency of these two parallel branches is identical, the duty ratio of working pulse is identical, conducting differs constantly within one-period, when the switch conduction of a parallel branch wherein, when passing inductance winding by this branch road of the power come by DC power supply, then make power be directly passed to load by the inductance winding of another parallel branch by magnetic-coupled mode, simultaneously, flow through the equal and opposite in direction of the D.C. magnetic biasing that the electric current of two windings produces in the iron core lateral column, direction is opposite, eliminate mutually, the iron core lateral column need not be opened air gap; Current ripples on each bar parallel branch is suppressed by the winding leakage inductance among the non DC bias first integrated magnetics IM1, when making the non DC bias first integrated magnetics IM1, satisfies different current ripples requirements by the size of adjusting leakage inductance.Winding is imported, exported to two windings of the non DC bias first integrated magnetics IM1 each other, and the number of turn of two winding is all identical with diameter of wire.The structure of the non DC bias first integrated magnetics IM1 comprises: E shape iron core, on the center pillar of iron core air gap is arranged, be wound with the first inductance winding L 1 and the second inductance winding L 2 on two lateral columns of iron core respectively, the direction of the direct current flux that they produce in the iron core lateral column is opposite.If two such non DC bias, the first integrated magnetics IM1 and the second integrated magnetics IM2 are arranged in the DC/DC converter, just the first integrated magnetics IM1 and the second integrated magnetics IM2 further are integrated on the iron core, become a non DC bias the 3rd integrated magnetics IM3.

The invention has the beneficial effects as follows: since the DC/DC converter using integrated magnetics structure of foregoing circuit structure and non DC bias, not only when any duty ratio, can eliminate the D.C. magnetic biasing in the inductor iron core, make the iron core lateral column need not open air gap, the volume of converter is reduced, weight saving, highly reduce; And the dynamic responding speed of converter is accelerated, input, output ripple electric current reduce, overload capacity strengthens, the eddy current loss of inductor winding reduces, the electromagnetic interference that produces reduces, current stress reduces, thereby is that " light, thin, short, little " and the high efficiency that realizes Switching Power Supply provides the theory and technology support.Simultaneously, the integrated magnetics of the circuit structure of this DC/DC converter and non DC bias thereof also is highly suitable for the switch converters of low-voltage and high-current output.

Description of drawings

Specify with embodiment below in conjunction with accompanying drawing.

Fig. 1 shows the DC/DC Switching Converter Topologies topological structure schematic diagram that adopts the non DC bias integrated magnetics.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment two of Fig. 2 diagrammatic sketch 1.

The embodiment three of Fig. 3 diagrammatic sketch 1 /DC Switching Converter Topologies topological structure schematic diagram.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment four of Fig. 4 diagrammatic sketch 1.

The embodiment five DC/DC Switching Converter Topologies topological structure schematic diagrames of Fig. 5 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment six of Fig. 6 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment seven of Fig. 7 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment eight of Fig. 8 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment nine of Fig. 9 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment ten of Figure 10 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment 11 of Figure 11 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment 12 of Figure 12 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment 13 of Figure 13 diagrammatic sketch 1.

The DC/DC Switching Converter Topologies topological structure schematic diagram of the embodiment 14 of Figure 14 diagrammatic sketch 1.

The structure of the non DC bias second integrated magnetics IM2 among the structure of the non DC bias first integrated magnetics IM1 and the embodiment four, six, eight among the embodiment one, two, three, four, six, eight, ten of Figure 15

diagrammatic sketch

1,12,13,14.

The structure of non DC bias the 3rd integrated magnetics IM3 among the embodiment five, seven, nine of Figure 16 diagrammatic sketch 1.

Among the figure, the 1-iron core; 2-iron core middle column; 3, first, second lateral column of 4-iron core; L1～L4-first～the 4th inductor; First, second gate-controlled switch device of S1, S2-; D1～D6-first～the 6th diode; C-output capacitance, first, second electric capacity of C1, C2-; IM1～IM6-first～the 6th integrated magnetics; The Vg-DC power supply; The R-load; First and second transformer of T1, T2-.

Embodiment

Embodiment one, with reference to accompanying drawing 1, a kind of DC/DC switch converters that adopts the non DC bias integrated magnetics, comprise non DC bias first an integrated magnetics IM1 who forms by the first inductor L1 and the second inductor L2, the first gate-controlled switch device S1 and the second gate-controlled switch device S2, the first diode D1 and the second diode D2, output capacitance C, DC power supply Vg, and load R.The characteristics of this reconfiguration device are to realize the two-way parallel connection, form a non DC bias first integrated magnetics IM1 by the first inductor L1 and the second inductor L2,1 end of the first integrated magnetics IM1 and 3 ends are end of the same name, 2 ends and 4 ends are end of the same name, above the electric current of a branch road flow into from 1 end, flow out from 2 ends, below the electric current of a branch road flow into from 4 ends, flow out from 3 ends; The first gate-controlled switch device S1 is identical with the switching frequency of the second gate-controlled switch device S2, and duty ratio is identical, and conducting differs constantly within one-period; The negative electrode of 1 termination, the first diode D1 of the first inductor L1 of the non DC bias first integrated magnetics IM1 and the source electrode of the first gate-controlled switch device S1 are (when the first gate-controlled switch device S1 adopts power MOFET, down together), the plus earth of the first diode D1, the drain electrode of the first gate-controlled switch device S1 connects the positive pole of DC power supply Vg, 3 ends of 2 terminations, the second inductor L2 of the first inductor L1, the end of the positive pole of output capacitance C and load R, the other end ground connection of the negative pole of output capacitance C and load R, the negative electrode of the 4 terminating diode D2 of the second inductor L2 of the first integrated magnetics IM1 and the source electrode of the second gate-controlled switch device S2 are (when the second gate-controlled switch device S2 adopts power MOFET, down together), the plus earth of the second diode D2, the drain electrode of the two the second gate-controlled switch device S2 connects the positive pole of DC power supply Vg, the minus earth of DC power supply Vg.The iron core 1 of the first integrated magnetics IM1 can adopt different shapes such as annular, U-shaped, plane U type, E shape, plane E shape, and core material can adopt various ferromagnetic materials such as ferrite, metal magnetic powder core, permalloy, amorphous, ultracrystallite; The first inductor L1 of the first integrated magnetics IM1 and the winding coil of the second inductor L2 can adopt round copper conductor, Copper Foil or printed circuit board (PCB) etc., generally with the number of turn of these two two coils and cross-sectional area of conductor long-pending be arranged to identical; The structure of the first integrated magnetics IM1 can adopt structure as shown in figure 15, is not only limited to this structure certainly, and it is in order to increase the leakage inductance of two windings that the center pillar 2 of a band air gap is arranged in the iron core 1.The first gate-controlled switch device S1 and the second gate-controlled switch device S2 can adopt various semiconductor switch devices such as power MOSFET, IGBT, GTR, GTO, SCR, IGCT, BCT, when the first diode D1 and second diode D2 employing gate-controlled switch device, also can adopt the semiconductor switch device of these kinds.

Embodiment two, with reference to accompanying drawing 2, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, comprise non DC bias first an integrated magnetics IM1 who forms by the first inductor L1 and the second inductor L2, the first gate-controlled switch device S1 and the second gate-controlled switch device S2, the first diode D1 and the second diode D2, output capacitance C, DC power supply Vg, and load R.The characteristics of the converter of this structure are to realize the two-way parallel connection, form a non DC bias first integrated magnetics IM1 by the first inductor L1 and the second inductor L2,1 end of the first integrated magnetics IM1 and 3 ends are end of the same name, 2 ends and 4 ends are end of the same name, above the electric current of a branch road flow into from 1 end, flow out from 2 ends, below the electric current of a branch road flow into from 4 ends, flow out from 3 ends; The first gate-controlled switch device S1 is identical with the switching frequency of the second gate-controlled switch device S2, and duty ratio is identical, and conducting differs constantly within one-period; 4 ends of 1 termination, the second inductor L2 of the first inductor L1 of the first integrated magnetics IM1 and the positive pole of DC power supply Vg, the anode of 2 terminations, the first diode D1 of the first inductor L1 and the drain electrode of the first gate-controlled switch device S1, the negative electrode of the first diode D1 connects the negative electrode of the second diode D2, the end of the positive pole of output capacitance C and load R, the source ground of first controllable switch S 1, the other end ground connection of the negative pole of output capacitance C and load R, the anode of 3 terminations, the second diode D2 of the second inductor L2 of the first integrated magnetics IM1 and the drain electrode of the second gate-controlled switch device S2, the source ground of the second gate-controlled switch device S2.The iron core that the first integrated magnetics IM1 adopts is with embodiment one; The winding coil that the first inductor L1 of the first integrated magnetics IM1 and the second inductor L2 adopt is with embodiment one; The structure of the first integrated magnetics IM1 can adopt structure as shown in figure 15, is not only limited to this structure certainly, and it is in order to increase the leakage inductance of two windings that the center pillar 2 of a band air gap is arranged in the iron core 1.The switching device that the first gate-controlled switch device S1 and the second gate-controlled switch device S2 and the first diode D1 and the second diode D2 adopt is with embodiment one.

Embodiment three, with reference to accompanying drawing 3, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, comprise non DC bias first an integrated magnetics IM1 who forms by the first inductor L1 and the second inductor L2, the first gate-controlled switch device S1 and the second gate-controlled switch device S2, the first diode D1 and the second diode D2, output capacitance C, DC power supply Vg, and load R.The characteristics of the converter of this structure are to realize the two-way parallel connection, form a non DC bias first integrated magnetics IM1 by the first inductor L1 and the second inductor L2,1 end of the first integrated magnetics IM1 and 3 ends are end of the same name, 2 ends and 4 ends are end of the same name, above the electric current of a branch road flow into from 1 end, flow out from 2 ends, below the electric current of a branch road flow into from 4 ends, flow out from 3 ends; The first gate-controlled switch device S1 is identical with the switching frequency of the second gate-controlled switch device S2, and duty ratio is identical, but conducting differs constantly within one-period; The source electrode of 1 termination, the first gate-controlled switch device S1 of the first inductor L1 of the first integrated magnetics IM1 and the negative electrode of the first diode D1, the drain electrode of the first gate-controlled switch device S1 connects the drain electrode of the second gate-controlled switch device S2 and the positive pole of DC power supply Vg, 3 ends of 2 terminations, the second inductor L2 of the first inductor L1 and the negative pole of DC power supply Vg, the source electrode of 4 terminations, the second gate-controlled switch device S2 of the second inductor L2 of the first integrated magnetics IM1 and the negative electrode of the second diode D2; The anode of the first diode D1 connects the anode of the second diode D2, the negative pole of output capacitance C and the end of load R, the negative pole of another termination DC power supply Vg of the positive pole of output capacitance C and load R.The iron core that the first integrated magnetics IM1 adopts is with embodiment one; The winding coil that the first inductor L1 of the first integrated magnetics IM1 and the second inductor L2 adopt is with embodiment one; The structure of the first integrated magnetics IM1 can adopt structure as shown in figure 15, is not only limited to this structure certainly, and it is in order to increase the leakage inductance of two windings that the center pillar 2 of a band air gap is arranged in the iron core 1.The switching device that the first gate-controlled switch device S1 and the first gate-controlled switch device S2 and the first diode D1 and the second diode D2 adopt is with embodiment one.

Embodiment four, with reference to accompanying drawing 4, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, comprise non DC bias first an integrated magnetics IM1 who forms by the input first inductor L1 and the second inductor L2, non DC bias second an integrated magnetics IM2 who forms by output the 3rd inductor L3 and the 4th inductor L4, the first gate-controlled switch device S1 and the second gate-controlled switch device S2, the first diode D1 and the second diode D2, output capacitance C, first capacitor C 1 and second capacitor C 2, DC power supply Vg, and load R.The characteristics of the converter of this structure are to realize the two-way parallel connection, form a non DC bias first integrated magnetics IM1 by the input first inductor L1 and the second inductor L2,1 end of the first integrated magnetics IM1 and 3 ends are end of the same name, 2 ends and 4 ends are end of the same name, above the input current of a branch road flow into from 1 end, flow out from 2 ends, below the input current of a branch road flow into from 4 ends, flow out from 3 ends; Form a non DC bias second integrated magnetics IM2 by output the 3rd inductor L3 and the 4th inductor L4,1 end of the second integrated magnetics IM2 and 3 ends are end of the same name, 2 ends of the second integrated magnetics IM2 and 4 ends are end of the same name, above the output current of a branch road flow into from 1 end of the second integrated magnetics IM2, flow out from 2 ends of the second integrated magnetics IM2, below the output current of a branch road flow into from 4 ends of the second integrated magnetics IM2, flow out from 3 ends of the second integrated magnetics IM2; The first gate-controlled switch device S1 is identical with the switching frequency of the second gate-controlled switch device S2, and duty ratio is identical, and conducting differs constantly within one-period; 4 ends of 1 termination, the second inductor L2 of the first inductor L1 of the first integrated magnetics IM1 and the positive pole of DC power supply Vg, the drain electrode of 2 terminations, the first gate-controlled switch device S1 of the first inductor L1 and the positive pole of first capacitor C 1, the source electrode of the first gate-controlled switch device S1 connects the negative pole of DC power supply Vg and the negative electrode of the first diode D1, the negative pole of first capacitor C 1 connects 1 end of the 3rd inductor L3 of the anode of the first diode D1 and the second integrated magnetics IM2, the drain electrode of 3 terminations, the second gate-controlled switch device S2 of the second inductor L2 of the first integrated magnetics IM1 and the positive pole of second capacitor C 2, the source electrode of the second gate-controlled switch device S2 connects the negative pole of DC power supply Vg and the negative electrode of the second diode D2, and the negative pole of second capacitor C 2 connects 4 ends of the 4th inductor L4 of the anode of the second diode D2 and the second integrated magnetics IM2; 3 ends, the negative pole of output capacitance C and the end of load R of 2 terminations the 4th inductor L4 of the 3rd inductor L3 of the second integrated magnetics IM2, the negative pole of another termination DC power supply Vg of the positive pole of output capacitance C and load R.The iron core 1 that the first integrated magnetics IM1 and the second integrated magnetics IM2 adopt is with embodiment one; The winding coil that the 3rd inductor L3 of the first inductor L1 of the first integrated magnetics IM1, the second inductor L2 and the second integrated magnetics IM2, the 4th inductor L4 adopt is with embodiment one, the structure of the first integrated magnetics IM1 and the second integrated magnetics IM2 can adopt structure as shown in figure 15, certainly be not only limited to this structure, it is in order to increase the leakage inductance of two windings that the center pillar 2 of a band air gap is arranged in the iron core 1.The switching device that the first gate-controlled switch device S1 and the second gate-controlled switch device S2 and 2 first utmost point pipe D1 and the second diode D2 adopt is with embodiment one.

Embodiment five, with reference to accompanying drawing 5, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, its connected mode is with embodiment four, and this converter and embodiment four unique difference structurally is the non DC bias first integrated magnetics IM1 and the second integrated magnetics IM2 further are integrated into a non DC bias the 3rd integrated magnetics IM3.The structure of non DC bias the 3rd integrated magnetics IM3 can adopt structure as shown in figure 16, is not only limited to this structure certainly, and it is in order to increase the leakage inductance of two windings that the center pillar 2 of a band air gap is arranged in the iron core 1.

Embodiment six, with reference to accompanying drawing 6, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, comprise non DC bias first an integrated magnetics IM1 who forms by the first inductor L1 and the second inductor L2, non DC bias second an integrated magnetics IM2 who forms by the 3rd inductor L3 and the 4th inductor L4, the first gate-controlled switch device S1 and the second gate-controlled switch device S2, the first diode D1 and the second diode D2, output capacitance C, first capacitor C 1 and second capacitor C 2, DC power supply Vg, and load R.The characteristics of the converter of this structure are to realize the two-way parallel connection, form a non DC bias first integrated magnetics IM1 by the first inductor L1 and the second inductor L2,1 end of the first integrated magnetics IM1 and 3 ends are end of the same name, 2 ends and 4 ends are end of the same name, the input current of the branch road in the left side flows into from 1 end, flow out from 2 ends, the input current of the branch road in the right side flows into from 4 ends, flows out from 3 ends; The 3rd inductor L3 and the 4th inductor L4 form non DC bias second an integrated magnetics IM2,1 end of the second integrated magnetics IM2 and 3 ends are end of the same name, 2 ends of the second integrated magnetics IM2 and 4 ends are end of the same name, above the output current of a branch road flow into from 1 end of the second integrated magnetics IM2, flow out from 2 ends of the second integrated magnetics IM2, below the output current of a branch road flow into from 4 ends of the second integrated magnetics IM2, flow out from 3 ends of the second integrated magnetics IM2; The first gate-controlled switch device S1 is identical with the switching frequency of the second gate-controlled switch magnetic spare S2, and duty ratio is identical, and conducting differs constantly within one-period; The source electrode of 1 termination, the first gate-controlled switch device S1 of the first inductor L1 of the first integrated magnetics IM1 and the positive pole of first capacitor C 1, the drain electrode of the first gate-controlled switch device S1 connects the drain electrode of the positive pole and the second gate-controlled switch device S2 of DC power supply Vg, the 2 end ground connection of the first inductor L1, the source electrode of 4 terminations, the second gate-controlled switch device S2 of the second inductor L2 of the first integrated magnetics IM1 and the positive pole of second capacitor C 2, the anode of 3 terminations, the first diode D1 of the second inductor L2 and ground, the negative pole of 1 termination, first capacitor C 1 of the 3rd inductor L3 of the second integrated magnetics IM2 and the negative electrode of the first diode D1,3 ends of 2 terminations the 4th inductor L4 of the 3rd inductor L3, the end of the positive pole of output capacitance C and load R, the other end ground connection of the negative pole of output capacitance C and load R, the negative pole of 4 terminations, second capacitor C 2 of the 4th inductor L4 and the negative electrode of the second diode D2, the plus earth of the second diode D2.The iron core 1 that the first integrated magnetics IM1 and the second integrated magnetics IM2 adopt is with embodiment one; The winding coil that the first integrated magnetics IM1 and the second integrated magnetics IM2 adopt is with embodiment one; The structure of the first integrated magnetics IM1 and the second integrated magnetics IM2 can adopt structure as shown in figure 15.The switching device that the first gate-controlled switch device S1 and the second gate-controlled switch device S2 and diode D1 and diode D2 adopt is with embodiment one.

Embodiment seven, with reference to accompanying drawing 7, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, its connected mode is with embodiment six, and this converter and embodiment six unique difference structurally is the non DC bias first integrated magnetics IM1 and the second integrated magnetics IM2 further are integrated into a non DC bias the 3rd integrated magnetics IM3.The structure of the 3rd integrated magnetics IM3 can adopt structure as shown in figure 16, is not only limited to this structure certainly.

Embodiment eight, with reference to accompanying drawing 8, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, comprise non DC bias first an integrated magnetics IM1 who forms by the first inductor L1 and the second inductor L2, non DC bias second an integrated magnetics IM2 who forms by the 3rd inductor L3 and the 4th inductor L4, the first gate-controlled switch device S1 and the second gate-controlled switch device S2, the first diode D1 and the second diode D2, output capacitance C, first capacitor C 1 and second capacitor C 2, DC power supply Vg, and load R.The characteristics of the converter of this structure are to realize the two-way parallel connection, form a non DC bias first integrated magnetics IM1 by the first inductor L1 and the second inductor L2,1 end of the first integrated magnetics IM1 and 3 ends are end of the same name, 2 ends of the first integrated magnetics IM1 and 4 ends are end of the same name, above the input current of a branch road flow into from 1 end of the first integrated magnetics IM1, flow out from 2 ends of the first integrated magnetics IM1, below the input current of a branch road flow into from 4 ends of the first integrated magnetics IM1, flow out from 3 ends of the first integrated magnetics IM1; Form a non DC bias second integrated magnetics IM2 by the 3rd inductor L3 and the 4th inductor L4,1 end of the second integrated magnetics IM2 and 3 ends are end of the same name, 2 ends of the second integrated magnetics IM2 and 4 ends are end of the same name, the output current of the branch road in the left side flows into from 1 end of the second integrated magnetics IM2, flow out from 2 ends of the second integrated magnetics IM2, the output current of the branch road in the right side flows into from 4 ends of the second integrated magnetics IM2, from the 3 ends outflow of the second integrated magnetics IM2; The first gate-controlled switch device S1 is identical with the switching frequency of the second gate-controlled switch device S2, and duty ratio is identical, and conducting differs constantly within one-period; 4 ends of 1 termination, the second inductor L2 of the first inductor L1 of the first integrated magnetics IM1 and the positive pole of DC power supply Vg, the drain electrode of 2 terminations, the first gate-controlled switch device S1 of the first inductor L1 and the positive pole of first capacitor C 1, the source ground of the first gate-controlled switch device S1, the drain electrode of 3 terminations, the second gate-controlled switch device S2 of the second inductance component L2 and the positive pole of second capacitor C 2, the source ground of the second gate-controlled switch device S2, the negative pole of 1 termination, first capacitor C 1 of the 3rd inductor L3 of the second integrated magnetics IM2 and the anode of the first diode D1, the 2 end ground connection of the 3rd inductor L3, the negative pole of 4 terminations, second capacitor C 2 of the 4th inductor L4 and the anode of the second diode D2, the 3 end ground connection of the 4th inductor L4, the negative electrode of the second diode D2 connects the negative electrode of the first diode D1, the end of the positive pole of output capacitance C and load R, the other end ground connection of the negative pole of output capacitance C and load R.The iron core 1 that the first integrated magnetics IM1 and the second integrated magnetics IM2 adopt is with embodiment one; The winding coil that the first integrated magnetics IM1 and the second integrated magnetics IM2 adopt is with embodiment one; The structure of the first integrated magnetics IM1 and the second integrated magnetics IM2 can adopt structure as shown in figure 15.The switching device that the first gate-controlled switch device S1 and the second gate-controlled switch device S2 and the first diode D1 and the second diode D2 adopt is with embodiment one.

Embodiment nine, with reference to accompanying drawing 9, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, its connected mode is with embodiment eight, and this converter and embodiment eight unique difference structurally is the non DC bias first integrated magnetics IM1 and the second integrated magnetics IM2 further are integrated into a non DC bias the 3rd integrated magnetics IM3.The structure of non DC bias the 3rd integrated magnetics IM3 can adopt structure as shown in figure 16, is not only limited to this structure certainly.

Embodiment ten, with reference to accompanying drawing 10, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, comprise non DC bias the 4th an integrated magnetics IM4 who forms by the first transformer T1 and the second transformer T2, non DC bias first an integrated magnetics IM1 who forms by the first inductor L1 and the second inductor L2, the first gate-controlled switch device S1 and the second gate-controlled switch device S2, first to fourth diode D1, D2, D3 and D4, output capacitance C, DC power supply Vg, and load R.The characteristics of the converter of this structure are to realize the two-way parallel connection, form a non DC bias the 4th integrated magnetics IM4 by the first transformer T1 and the second transformer T2,1 end of the 4th integrated magnetics IM4,3 ends, 5 ends and 7 ends are end of the same name, and 2 ends of the 4th integrated magnetics IM4,4 ends, 6 ends and 8 ends are end of the same name; Form a non DC bias first integrated magnetics IM1 by the first inductor L1 and the second inductor L2,1 end of the first integrated magnetics IM1 and 3 ends are end of the same name, 2 ends of the first integrated magnetics IM1 and 4 ends are end of the same name, above the output current of a branch road flow into from 1 end of the first integrated magnetics IM1, flow out from 2 ends of the first integrated magnetics IM1, below the output current of a branch road flow into from 4 ends of the first integrated magnetics IM1, flow out from 3 ends of the first integrated magnetics IM1; The first gate-controlled switch device S1 is identical with the switching frequency of the second gate-controlled switch device S2, and duty ratio is identical, and conducting differs constantly within one-period; The drain electrode of 1 termination, the first gate-controlled switch device S1 of the 4th integrated magnetics IM4, the source electrode of the first gate-controlled switch device S1 connects the source electrode of the second gate-controlled switch device S2, the negative pole of DC power supply Vg and ground, 2 terminations, 5 ends of the 4th integrated magnetics IM4 and the positive pole of DC power supply Vg, the drain electrode of 6 terminations, the second gate-controlled switch device S2 of the 4th integrated magnetics IM4, the anode of 3 terminations, the first diode D1 of the 4th integrated magnetics IM4,4 terminations, 7 ends of the 4th integrated magnetics IM4, the anode of the second diode D2, the anode of the 4th diode D4 and ground, the anode of 8 terminations the 3rd diode D3 of the 4th integrated magnetics IM4, the negative electrode of 1 termination, the first diode D1 of the first inductor L1 of the first integrated magnetics IM1 and the negative electrode of the second diode D2,2 terminations, 3 ends of the first integrated magnetics IM1, the end of the positive pole of output capacitance C and load R, the negative electrode of 4 terminations the 3rd diode D3 of the first integrated magnetics IM1 and the negative electrode of the 4th diode D4, the other end ground connection of the negative pole of output capacitance C and load R.The iron core 1 that the 4th integrated magnetics IM4 and the first integrated magnetics IM1 adopt is with embodiment one; The winding coil that the 4th integrated magnetics IM4 and the first integrated magnetics IM1 adopt is with embodiment one.The switching device that the first gate-controlled switch device S1 and the second gate-controlled switch device S2 and first to fourth diode D1, D2, D3 and D4 adopt is with embodiment one.The first inductor L1 and the second inductance component L2 can be not integrated yet in the present embodiment.

Embodiment 11, with reference to accompanying drawing 11, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, its connected mode is with embodiment ten, and this converter and embodiment ten unique difference structurally is the 4th integrated magnetics IM4 and the first integrated magnetics IM1 further are integrated into a non DC bias the 5th integrated magnetics IM5.

Embodiment 12, with reference to accompanying drawing 12, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, this converter and embodiment ten are basic identical, its structural difference is the 4th integrated magnetics IM4 among the embodiment 11 is removed a winding, form new non DC bias the 6th an integrated magnetics IM6, remove a gate-controlled switch device simultaneously.Also the 6th integrated magnetics IM6 and the first integrated magnetics IM1 further can be integrated into the magnetic spare of a non DC bias.

Embodiment 13, with reference to accompanying drawing 13, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, its connected mode is with embodiment ten, and this converter and embodiment ten difference structurally are non DC bias the 4th integrated magnetics IM4 is divided into two the independently first transformer T1 and the second transformer T2.

Embodiment 14, with reference to accompanying drawing 14, a kind of DC/DC switch converters in parallel that adopts the non DC bias integrated magnetics, its connected mode and embodiment ten are basic identical, this converter and embodiment ten difference structurally are that the 4th integrated magnetics IM4 is removed a winding forms the first transformer T1, input side at the first transformer T1 increases the 5th diode D5 and the 6th diode D6 simultaneously, and the first gate-controlled switch device S1 and the second gate-controlled switch device S2 be turn-on and turn-off simultaneously.Its connected mode is: the source electrode of 1 termination, the first gate-controlled switch device S1 of the first transformer T1 and the negative electrode of the 6th diode D6, the drain electrode of 2 terminations, the second gate-controlled switch device S2 of the first transformer T1 and the anode of the 5th diode D5, the drain electrode of the first gate-controlled switch device S1 and the negative electrode of the 5th diode D5 connect the positive pole of DC power supply Vg, and the source electrode of the second gate-controlled switch device S2 and the anode of the 6th diode D6 connect negative pole and the ground of DC power supply Vg; The anode of 3 terminations, the first diode D1 of the first transformer T1, the anode of 4 terminations, 5 ends of the first transformer T1, the anode of the second diode D2, the 4th diode D4 and ground, the anode of 6 terminations the 3rd diode D3 of the first transformer T1; The negative electrode of 1 termination, the first diode D1 of the first inductor L1 of the first integrated magnetics IM1 and the negative electrode of the second diode D2,3 ends, the positive pole of output capacitance C and the end of load R of 2 terminations, the second inductor L2 of the first inductor L1 of the first integrated magnetics IM1, the negative electrode of 4 terminations the 3rd diode D3 of the second inductor L2 of the first integrated magnetics IM1 and the negative electrode of the 4th diode D4; The other end ground connection of the negative pole of output capacitance C and load R.

Claims

1. A DC/DC switching converter adopting no DC bias integrated magnetic parts is characterized in that the DC/DC switching converter adopting no DC bias integrated magnetic parts implements two-way parallel connection, and the two parallel branches are connected in parallel The windings of the first inductor (L1) and the second inductor (L2) are integrated on an iron core (1), forming a first integrated magnetic part (IM1) without DC bias, and the first integrated magnetic part ( Terminal 1 of the first inductor (L1) of IM1) and terminal 3 of the second inductor (L2) are terminals with the same name, and terminal 2 of the first inductor (L1) and terminal 4 of the second inductor (L2) are At the terminal with the same name, the current of the first inductor (L1) branch flows in from terminal 1 and flows out from terminal 2, and the current of the second inductor (L2) branch flows in from terminal 4 and flows out from terminal 3; the first inductor ( The switching frequency of the first controllable switching device (S1) of the L1) branch and the second controllable switching device (S2) of the second inductor (L2) branch are the same, the duty cycle is the same, and the difference in the conduction time is within one During the period, when the controllable switching device (S1 or S2) of one branch of the first inductor (L1) branch and the second inductor (L2) branch is turned on, the power transmitted by the DC power supply When passing through the inductor winding of this branch, the power is directly transmitted to the load from the inductor winding of the other branch through magnetic coupling, and at the same time, the current flowing through the two inductor windings is in the core (1) The DC bias magnetism generated in the first side column (3) and the second side column (4) of the iron core (1) are equal in magnitude, opposite in direction, and cancel each other, and the first side column (3) and the second side column of the iron core (1) (4) No need to open an air gap; no DC bias The first integrated magnetic part (IM1) includes: an E-shaped iron core (1), an air gap is arranged on the center column (2) of the iron core (1), and the iron core (1 ) The first side column (3) and the second side column (4) are respectively wound with a first inductor (L1) winding and a second inductor (L2) winding, and the DC generated by them in the iron core (1) The direction of the magnetic flux is opposite, and the number of winding turns and wire diameter of the first inductor (L1) and the second inductor (L2) are the same.

2. A DC/DC switching converter using no DC bias integrated magnetic parts according to claim 1, characterized in that the first inductor (L1) of the first integrated magnetic part (IM1) is connected to 1 terminal The cathode of the first diode (D1) and the source of the first switch controllable device (S1), the anode of the first diode (D1) is grounded, and the drain of the first controllable switch device (S1) is connected to DC The positive pole of the power supply (Vg), the 2 terminals of the first inductor (L1) are connected to the 3 terminals of the second inductor (L2), the positive pole of the output capacitor (C) and one end of the load (R), the output capacitor (C) The negative pole and the other end of the load (R) are grounded; the 4 terminals of the second inductor (L2) of the first integrated magnetic part (IM1) are connected to the cathode of the second diode (D2) and the first controllable switching device (S2 ), the anode of the second diode (D2) is grounded, the drain of the first control switching device (S2) is connected to the positive pole of the DC power supply (Vg), and the negative pole of the DC power supply (Vg) is grounded.

3. The DC/DC switching converter adopting no DC bias integrated magnetic parts according to claim 1, characterized in that 1 end of the first inductor (L1) of the first integrated magnetic part (IM1) is connected to the second 4 terminals of the inductor (L2) and the positive pole of the DC power supply (Vg), 2 terminals of the first inductor (L1) are connected to the anode of the first diode (D1) and the drain of the first controllable switching device (S1) pole, the cathode of the first diode (D1) is connected to the cathode of the second diode (D2), the anode of the output capacitor (C) and one end of the load (R), the source of the first controllable switching device (S1) The pole is grounded, the negative pole of the output capacitor (C) and the other end of the load (R) are grounded; the 3-terminal of the second inductor (L2) of the first integrated magnetic part (IM1) is connected to the anode of the second diode (D2) and the drain of the second controllable switching device (S2), and the source of the second controllable switching device (S2) is grounded.

4. The DC/DC switching converter adopting no DC bias integrated magnetic parts according to claim 1, characterized in that terminal 1 of the first inductor (L1) of the first integrated magnetic part (IM1) is connected to the first The source of the controllable switching device (S1) and the cathode of the first diode (D1), the drain of the first controllable switching device (S1) is connected to the drain of the second controllable switching device (S2) and the DC power supply The positive pole of (Vg), the 2 terminals of the first inductor (L1) are connected to the 3 terminals of the second inductor (L2) and the negative pole of the DC power supply (Vg); the 4 terminals of the second inductor (L2) are connected to the second Control the source of the switching device (S2) and the cathode of the second diode (D2); the anode of the first diode (D1) is connected to the anode of the second diode (D2), and the cathode of the output capacitor (C) And one end of the load (R), the positive pole of the output capacitor (C) and the other end of the load (R) are connected to the negative pole of the DC power supply (Vg).

5. The DC/DC switching converter adopting no DC bias integrated magnetic parts according to claim 1, characterized in that a main magnetic is composed of the output third inductor (L3) and the fourth inductor (L4) The second integrated magnetic part (IM2) without DC bias; terminal 1 of the first inductor (L1) is connected to terminal 4 of the second inductor (L2) and the positive pole of the DC power supply (Vg), and the first inductor ( The 2 terminals of L1) are connected to the drain of the first controllable switching device (S1) and the positive pole of the first capacitor (C1), and the source of the first controllable switching device (S1) is connected to the negative pole of the DC power supply (Vg) and the first capacitor (C1). The cathode of a diode (D1), the cathode of the first capacitor (C1) is connected to the anode of the first diode (D1) and 1 end of the third inductor (L3) of the second integrated magnetic part (IM2); The 3 terminals of the second inductor (L2) are connected to the drain of the second controllable switching device (S2) and the positive pole of the second capacitor (C2), and the source of the second controllable switch (S2) is connected to the DC power supply (Vg ) and the cathode of the second diode (D2), the cathode of the second capacitor (C2) is connected to the anode of the second diode (D2) and the 4 terminals of the fourth inductor (L4); the third inductor Terminal 2 of (L3) is connected to terminal 3 of the fourth inductor (L4), the negative pole of the output capacitor (C) and one terminal of the load (R), and the positive pole of the output capacitor (C) and the other terminal of the load (R) are connected to DC Negative terminal of power supply (Vg).

6. The DC/DC switching converter using integrated magnetic parts without DC bias according to claim 1, characterized in that a main magnetic circuit is composed of a third inductor (L3) and a fourth inductor (L4) without The second integrated magnetic part (IM2) of DC bias, 1 terminal of the first inductor (L1) is connected to the source pole of the first controllable switching device (S1) and the positive pole of the first capacitor (C1), the first controllable The drain of the switching device (S1) is connected to the positive pole of the DC power supply (Vg) and the drain of the second controllable switching device (S2), and the two terminals of the first inductor (L1) are grounded; the terminals of the second inductor (L2) 4 terminals are connected to the source of the second controllable switching device (S2) and the anode of the second capacitor (C2), and 3 terminals of the second inductor (L2) are connected to the anode of the first diode (D1) and ground; Terminal 1 of the third inductor (L3) is connected to the cathode of the first capacitor (C1) and the cathode of the first diode (D1), and terminal 2 of the third inductor (L3) is connected to terminal 3 of the fourth inductor (L4). Terminal, the positive pole of the output capacitor (C) and one end of the load (R), the negative pole of the output capacitor (C) and the other end of the load (R) are grounded; the 4-terminal of the fourth inductor (L4) is connected to the capacitor (C2) The cathode and the cathode of the second diode (D2), and the anode of the second diode (D2) are grounded.

7. The DC/DC switching converter using integrated magnetic parts without DC bias according to claim 1, characterized in that a main magnetic circuit is composed of a third inductor (L3) and a fourth inductor (L4) without The second integrated magnetic part (IM2) of the DC bias, the 1 terminal of the first inductor (L1) is connected to the 4 terminal of (L2) and the positive pole of the DC power supply (Vg), and the 2 terminals of the first inductor (L1) are connected The drain of the first controllable switching device (S1) and the positive pole of the first capacitor (C1), the source of the first controllable switching device (S1) are grounded; the 3 terminals of the second inductor (L2) are connected to the second The drain of the control switching device (S2) and the positive pole of the second capacitor (C2), the source of the second controllable switching device (S2) is grounded; the third inductor (L3) of the second integrated magnetic part (IM2) Terminal 1 is connected to the cathode of the first capacitor (C1) and the anode of the first diode (D1), and terminal 2 of the third inductor (L3) is grounded; terminal 4 of the fourth inductor (L4) is connected to the second capacitor ( The cathode of C2) and the anode of the second diode (D2), the 3 ends of the fourth inductor (L4) are grounded; the cathode of the second diode (D2) is connected to the cathode of the first diode (D1), The positive pole of the output capacitor (C) and one end of the load (R), and the negative pole of the output capacitor (C) and the other end of the load (R) are grounded.

8. The DC/DC switching converter using integrated magnetic parts without DC bias according to claim 1, characterized in that a main magnetic circuit composed of the first transformer (T1) and the second transformer (T2) has no DC bias Magnetic fourth integrated magnetic part (IM4), composed of the first inductor (L1) and the second inductor (L2) to form a first integrated magnetic part (IM1) without DC bias; the fourth integrated magnetic part (IM4 ) terminal 1 is connected to the drain of the first controllable switching device (S1), the source of the first controllable switching device (S1) is connected to the source of the second controllable switching device (S2), the DC power supply (Vg) Negative pole and ground; Terminal 2 of the fourth integrated magnetic part (IM4) is connected to terminal 5 of the fourth integrated magnetic part (IM4) and the positive pole of the DC power supply (Vg); terminal 6 of the fourth integrated magnetic part (IM4) is connected to the second The drain of the controllable switching device (S2); the 3 terminals of the fourth integrated magnetic part (IM4) are connected to the anode of the first diode (D1), and the 4 terminals of the fourth integrated magnetic part (IM4) are connected to the fourth integrated magnetic part The 7 terminals of the component (IM4), the anode of the second diode (D2), the anode of the fourth diode (D4) and the ground, and the 8 terminals of the fourth integrated magnetic component (IM4) are connected to the third diode ( D3) anode; 1 terminal of the first inductor (L1) of the first integrated magnetic part (IM1) is connected to the cathode of the first diode (D1) and the cathode of the second diode (D2), the first integrated The 2 ends of the first inductor (L1) of the magnetic part (IM1) are connected to the 3 ends of the second inductor (L2), the positive pole of the output capacitor (C) and one end of the load (R), and the first integrated magnetic part (IM1 ) of the second inductor (L2) is connected to the cathode of the third diode (D3) and the cathode of the fourth diode (D4); the negative pole of the output capacitor (C) and the other end of the load (R) grounded.

9. The DC/DC switching converter adopting no DC bias integrated magnetic parts according to claim 8, characterized in that one winding is removed from the fourth integrated magnetic part (IM4) in claim 8 to form the first transformer ( T1), while adding a fifth diode (D5) and a sixth diode (D6) on the input side of the first transformer (T1), the first controllable switching device (S1) and the second controllable switching device ( S2) is turned on and off at the same time, terminal 1 of the first transformer (T1) is connected to the source of the first controllable switching device (S1) and the cathode of the sixth diode (D6), and the terminal of the first transformer (T1) 2 terminals are connected to the drain of the second controllable switching device (S2) and the anode of the fifth diode (D5), the drain of the first controllable switching device (S1) and the cathode of the fifth diode (D5) , connected to the positive pole of the DC power supply (Vg), the source pole of the second controllable switching device (S2) and the anode of the sixth diode (D6) connected to the negative pole and ground of the DC power supply (Vg); the first transformer (T1) The 3 terminals of the first transformer (T1) are connected to the anode of the first diode (D1), the 4 terminals of the first transformer (T1) are connected to the 5 terminals of the first transformer (T1), the anode of the second diode (D2), and the fourth diode The anode and ground of the tube (D4), the 6-terminal of the first transformer (T1) is connected to the anode of the third diode (D3); the 1-terminal of the first inductor (L1) of the first integrated magnetic part (IM1) is connected to The cathode of the first diode (D1) and the cathode of the second diode (D2), the 2 ends of the first inductor (L1) of the first integrated magnetic (IM1) are connected to the second inductor (L2) 3 terminals, the positive pole of the output capacitor (C) and one terminal of the load (R), the 4 terminals of the second inductor (L2) of the first integrated magnetic part (IM1) are connected to the cathode of the third diode (D3) and the first The cathode of the four diodes (D4); the cathode of the output capacitor (C) and the other end of the load (R) are grounded.