CN215120573U - Magnetic integration interleaved LLC resonant converter - Google Patents
Magnetic integration interleaved LLC resonant converter Download PDFInfo
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- CN215120573U CN215120573U CN202120131624.2U CN202120131624U CN215120573U CN 215120573 U CN215120573 U CN 215120573U CN 202120131624 U CN202120131624 U CN 202120131624U CN 215120573 U CN215120573 U CN 215120573U
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Abstract
The utility model discloses a crisscross parallelly connected LLC resonant converter of magnetism integration. It is characterized by comprising: the primary side direct current power supply, the input filter capacitor, the primary side inverter bridge, the output filter capacitor and the output load; the first-phase full-bridge LLC resonant converter comprises a first primary side inverter bridge, a first resonant capacitor, a resonant inductor and transformer and a first secondary side rectifier bridge, and the second-phase full-bridge LLC resonant converter comprises a second primary side inverter bridge, a second resonant capacitor, a resonant inductor and transformer and a second secondary side rectifier bridge; the magnetic integrated structure I integrates resonance inductance of the two-phase full-bridge LLC resonant converter in one magnetic core, the magnetic integrated structure II integrates a transformer and excitation inductance of the two-phase full-bridge LLC resonant converter in one magnetic core, the whole converter only comprises two magnetic elements, the weight and the volume of the magnetic elements are effectively reduced, the practical design and the application are facilitated, and the power density of the converter is improved.
Description
Technical Field
The utility model relates to a power electronics magnetism integrated technology, concretely relates to magnetism integrated crisscross parallelly connected LLC resonant converter.
Background
In recent years, converters with small size, light weight, high efficiency and high power density are the targets of people to pursue, and as LLC resonant converters can realize the excellent characteristics of soft switching in the full load range, their applications in various fields of production, life and the like are expanding, but new challenges are also presented to their capacities along with the development. The capacity of the converter can be increased by introducing the staggered parallel technology into the LLC resonant converter, and the voltage and current stress of each element in each phase passage can be effectively reduced within a certain output power range, so that the flexibility of device type selection is increased. However, the magnetic elements are increased, the design of the resonant inductor and the transformer, the volume and weight of the converter are increased, and the like, and the magnetic elements are used as core components in the converter, the volume and weight of the magnetic elements account for a high proportion of the whole converter system, and have important influence on the operational reliability and efficiency, so the magnetic elements become main factors limiting the increase of the power density of the converter. The magnetic integration technology is introduced, so that the size and the weight of the magnetic element can be effectively reduced, the output current ripple is reduced, the dynamic performance of the converter is improved, and the power density of the converter is improved.
In the actual design of the prior art, the integration level of the interleaved parallel LLC resonant converter is not high, only the integration between two phase resonant inductors is realized, and a transformer of the interleaved parallel LLC resonant converter mostly adopts discrete devices, so that the improvement of the power density is not facilitated.
SUMMERY OF THE UTILITY MODEL
To prior art's defect, the utility model provides a magnetism integration crisscross parallelly connected LLC resonant converter to realize the crisscross parallel operation of full-bridge LLC resonant converter, and crisscross parallelly connected back magnetic element's integrated design, and then can improve output, reduce the converter volume, improve the power density of converter.
The utility model provides a crisscross parallelly connected LLC resonant converter of magnetism integration, include: primary side DC power supply VinAn input filter capacitor CinA first primary side inverter bridge, a second primary side inverter bridge, resonance and voltage transformation, a first secondary side rectifier bridge, a second secondary side rectifier bridge and an output filter capacitor C0Output load R0(ii) a The first primary side inverter bridge is connected with the second primary side inverter bridge through resonance and voltage transformation, the second primary side inverter bridge through resonance and voltage transformation is respectively connected with the first primary side inverter bridge, the second primary side inverter bridge through resonance and voltage transformation, the first secondary side rectifier bridge is connected with the second secondary side rectifier bridge through resonance and voltage transformation, the second secondary side rectifier bridge is connected with the first secondary side inverter bridge, the second secondary side inverter bridge through resonance and voltage transformation, and the output filter capacitor C is connected with the second secondary side rectifier bridge through resonance and voltage transformation0Output load R0The first primary side inverter bridge and the second primary side inverter bridge are respectively connected with a primary side direct current power supply VinAn input filter capacitor CinConnecting; the resonance and voltage change device comprises a first magnetic integrated structure and a second magnetic integrated structure, wherein the first magnetic integrated structure integrates resonance inductance of the two-phase full-bridge LLC resonant converter in one magnetic core, and the second magnetic integrated structure integrates a transformer and excitation inductance of the two-phase full-bridge LLC resonant converter in one magnetic core;
the first primary side inverter bridge comprises a switching device Q1Switching device Q2Switching device Q3Switching device Q4Switching device Q1Source electrode of same switching device Q2Is connected to the drain of the switching device Q3Source electrode of same switching device Q4Is connected to the drain of the switching device Q1Drain electrode of the same-switch device Q3Is connected to the drain of the switching device Q2Source electrode of same switching device Q4The source electrodes of the first and second transistors are connected; the second primary side inverter bridge comprises a switching device Q5Switching device Q6Switching device Q7Switching device Q8Switching device Q5Source electrode of same switching device Q6Is connected to the drain of the switching device Q7Source electrode of same switching device Q8Is connected to the drain electrodeConnected to a switching device Q5Drain electrode of the same-switch device Q7Is connected to the drain of the switching device Q6Source electrode of same switching device Q8The source electrodes of the first and second transistors are connected; switching device Q in first primary side inverter bridge1Drain electrode of (1), switching device Q3The drain electrode of the first primary side inverter bridge is connected with a switching device Q in a second primary side inverter bridge5Drain electrode of (1), switching device Q7The drains of the first primary inverter bridge are connected to form a node, and a switching device Q in the first primary inverter bridge2Source electrode of (1), switching device Q4The source electrode of the first primary side inverter bridge is connected with a switching device Q in a second primary side inverter bridge6Source electrode of (1), switching device Q8The source electrodes are connected to form a node II; the resonance and voltage conversion comprises a first resonance capacitor Cr1A second resonant capacitor Cr2The magnetic integrated structure I and the magnetic integrated structure II; the first secondary rectifier bridge comprises a rectifier diode Dr1Rectifier diode Dr2Rectifier diode Dr3Rectifier diode Dr4Rectifier diode Dr1Anode of the same rectifier diode Dr2Is connected to the cathode of a rectifier diode Dr3Anode of the same rectifier diode Dr4Is connected to the cathode of a rectifier diode Dr1Cathode of the same-rectifier diode Dr3Is connected to the cathode of a rectifier diode Dr2Anode of the same rectifier diode Dr4The anode of the anode is connected; the second secondary side rectifier bridge comprises a rectifier diode Dr5Rectifier diode Dr6Rectifier diode Dr7Rectifier diode Dr8Rectifier diode Dr5Anode of the same rectifier diode Dr6Is connected to the cathode of a rectifier diode Dr7Anode of the same rectifier diode Dr8Is connected to the cathode of a rectifier diode Dr5Cathode of the same-rectifier diode Dr7Is connected to the cathode of a rectifier diode Dr6Anode of the same rectifier diode Dr8The anode of the anode is connected; rectifier diode D in the first secondary rectifier bridger1Cathode of (2), rectifier diode Dr3The cathode of the rectifier is connected with a rectifier diode D in a second secondary side rectifier bridger5Cathode of (2), rectifier diode Dr7Are connected to form a node③, a rectifier diode D in the first secondary rectifier bridger2Anode of (2), rectifier diode Dr4The anode of the rectifier diode is connected with a rectifier diode D in a rectifier bridge of the second secondary sider6Anode of (2), rectifier diode Dr8The anodes are connected to form a node; the input filter capacitor CinIs connected with the first node and the second node; the output filter capacitor C0Connecting with the third node and the fourth node; the primary side direct current power supply VinSame-input filter capacitor CinConnecting; the output load R0Same-output filter capacitor C0Connecting; one port A 'of the magnetic integrated structure is connected with a port A of a first primary side inverter bridge, one port C' of the magnetic integrated structure is connected with a second port A of the magnetic integrated structure, and a second port B of the magnetic integrated structure is connected with a first resonant capacitor Cr1The magnetic integrated structure is connected with a first primary side inverter bridge port B, a second port C of the magnetic integrated structure is connected with a first secondary side rectifier bridge port C, a second port D of the magnetic integrated structure is connected with a first secondary side rectifier bridge port D, a first port B 'of the magnetic integrated structure is connected with a second primary side inverter bridge port E, a first port D' of the magnetic integrated structure is connected with a second port E of the magnetic integrated structure, and a second port F of the magnetic integrated structure is connected with a second resonant capacitor Cr2And the magnetic integrated structure is connected with a second primary side inverter bridge port F, a second port G of the magnetic integrated structure is connected with a second secondary side rectifier bridge port G, and a second port H of the magnetic integrated structure is connected with a second secondary side rectifier bridge port H.
Optionally, the first-phase full-bridge LLC resonant converter includes a first primary-side inverter bridge, a first resonant capacitor, a resonant inductor and transformer, and a first secondary rectifier bridge, and the second-phase full-bridge LLC resonant converter includes a second primary-side inverter bridge, a second resonant capacitor, a resonant inductor and transformer, and a second secondary rectifier bridge, and the two-phase full-bridge LLC resonant converter adopts a connection mode in which input ends are connected in parallel and output ends are connected in parallel.
Optionally, the first magnetic integrated structure comprises a UIU magnetic core, a first resonant inductor winding Lr1A first winding L of a second resonant inductorr21A second resonant inductor second winding Lr22(ii) a The first resonant inductor winding Lr1Wound on the side pole I of the magnetic core, and a first winding L of a second resonant inductorr21A second resonant inductor winding L wound on the center pillar III of the magnetic corer22Winding on the magnetic core side post II; wherein the first resonant inductor winding Lr1One end of the first resonant inductor winding is used as a port A' of the first magnetic integrated structurer1The other end of the first resonant inductor is used as a port C' of the first magnetic integrated structure, and a first winding L of a second resonant inductorr21One end of the first resonant inductor is used as a port B' of the first magnetic integrated structure, and the first winding L of the second resonant inductorr21The other end is connected with a second winding L of a second resonant inductorr22Connected, second resonant inductor second winding Lr22The other end of the magnetic integrated structure I is used as a port D' of the magnetic integrated structure I; air gaps are formed between the UIU magnetic core column III and the magnetic column I and between the magnetic column III and the magnetic column II.
Optionally, the second magnetic integrated structure includes an I-shaped magnetic core and a first primary winding NP1A first secondary winding NS1A first winding N of a second primary sideP21A second primary side second winding NP22A second secondary side first winding NS21A second secondary side second winding NS22(ii) a The first primary winding NP1Wound on the center pole III of the magnetic core, and a first secondary winding NS1A first winding N wound on the center post III of the magnetic coreP21A second primary winding N wound on the side pole I of the magnetic coreP22Wound on the side pole II of the magnetic core and a first winding N on the second secondary sideS21A second winding N wound on the side column I of the magnetic core and having a second secondary sideS22Winding on the magnetic core side post II; wherein the first primary winding NP1The same name end of the magnetic integrated structure is used as a two-port A of the magnetic integrated structure, and a first primary winding NP1The different name end of the magnetic integrated structure is used as a two-port B of the magnetic integrated structure, and a first secondary winding NS1The same name end of the magnetic integrated structure is used as a two-port C of the magnetic integrated structure, and a first secondary winding NS1The unlike terminal of the magnetic integrated structure is used as a two-port D of the magnetic integrated structure, and a first primary winding NP21The same name end of the first primary side is used as a second port E of the magnetic integrated structure, and a first winding N of a second primary sideP21The different name end of the first primary side is connected with a second primary side second winding NP22Are connected with the same name end of the first primary side second winding NP22The different name end of the magnetic integrated structure is used as a second port F of the magnetic integrated structure, and a first winding N of a second secondary sideS21End of same name asTwo ports G and a second secondary side first winding N of the magnetic integrated structureS21The different name end of the first winding and the second secondary side of the second winding NS22Are connected with the same name end of the first winding NS22The synonym terminal of (1) is used as a two-port H of the magnetic integrated structure.
Optionally, the magnetic core of the second magnetic integrated structure is an "I-shaped" magnetic core structure, and includes two opposite "U" magnetic cores and two "I" magnetic cores, the two opposite "U" magnetic cores of the second magnetic integrated structure are tightly connected without an air gap to form an "I" magnetic core, and are located between the two "I" magnetic cores, and an air gap is provided between the two "I" magnetic cores and the opening of the "I" magnetic core.
Optionally, the first primary-side inverter bridge and the second primary-side inverter bridge adopt frequency conversion control, phase shift control, and frequency conversion + phase shift hybrid control.
The utility model has the advantages that: the utility model discloses improve current structure, a crisscross parallelly connected LLC resonant converter of magnetism integration is proposed, two new magnetism integrated configuration are provided, magnetism integrated configuration one has integrated double-phase full-bridge LLC resonant converter's resonance inductance in a magnetic core, magnetism integrated configuration two has integrated double-phase full-bridge LLC resonant converter's transformer and excitation inductance in a magnetic core, whole converter only contains two magnetic elements, in order to make things convenient for actual design and application, and the running state of integrated back converter is not influenced, magnetic element's weight and volume have been reduced effectively, reduce the loss of converter, the power density of converter has been improved. The two-phase or multi-phase full-bridge LLC resonant converters are in staggered parallel operation, so that the power and the capacity of the converters are effectively expanded, and the high-efficiency transmission of electric energy is realized; the two phases of the magnetic integration staggered parallel full-bridge LLC resonant converter adopt a mode of input parallel connection and output parallel connection, and the capacity of the converter is expanded while the current sharing of the output of the two-phase full-bridge LLC resonant converter is ensured.
Drawings
Fig. 1 is a schematic diagram of a magnetic integrated interleaved LLC resonant converter according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the present invention, in which two-phase resonant inductors are magnetically integrated by using only one UIU-shaped magnetic core.
Fig. 3 is a structural schematic diagram of the present invention, in which two-phase transformers and their excitation inductors are magnetically integrated by using only one I-shaped magnetic core.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings: it should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention. (the invention will now be further explained and illustrated by means of the description and the figures)
Fig. 1 is the embodiment of the utility model provides a crisscross parallelly connected LLC resonant converter of magnetism integration schematic diagram, the embodiment of the utility model provides a crisscross parallelly connected LLC resonant converter of magnetism integration includes: primary side DC power supply VinAn input filter capacitor CinA first primary side inverter bridge, a second primary side inverter bridge, resonance and voltage transformation, a first secondary side rectifier bridge, a second secondary side rectifier bridge and an output filter capacitor C0Output load R0(ii) a The first primary side inverter bridge is connected with the second primary side inverter bridge through resonance and voltage transformation, the second primary side inverter bridge through resonance and voltage transformation is respectively connected with the first primary side inverter bridge, the second primary side inverter bridge through resonance and voltage transformation, the first secondary side rectifier bridge is connected with the second secondary side rectifier bridge through resonance and voltage transformation, the second secondary side rectifier bridge is connected with the first secondary side inverter bridge, the second secondary side inverter bridge through resonance and voltage transformation, and the output filter capacitor C is connected with the second secondary side rectifier bridge through resonance and voltage transformation0Output load R0The first primary side inverter bridge and the second primary side inverter bridge are respectively connected with a primary side direct current power supply VinAn input filter capacitor CinConnecting; the resonance and voltage change device comprises a first magnetic integrated structure and a second magnetic integrated structure, wherein the first magnetic integrated structure integrates resonance inductance of the two-phase full-bridge LLC resonant converter in one magnetic core, and the second magnetic integrated structure integrates a transformer and excitation inductance of the two-phase full-bridge LLC resonant converter in one magnetic core;
the first primary side inverter bridge comprises a switching device Q1Switching device Q2Switching device Q3Switching device Q4Switching device Q1Source electrode of same switching device Q2Is connected to the drain of the switching device Q3Source electrode of same switching device Q4Is connected to the drain of the switching device Q1Drain electrode of the same-switch device Q3Is connected to the drain of the switching device Q2Source electrode of same switching device Q4The source electrodes of the first and second transistors are connected; the second primary side inverter bridge comprises a switching device Q5Switching device Q6Switching device Q7Switching device Q8Switching device Q5Source electrode of same switching device Q6Is connected to the drain of the switching device Q7Source electrode of same switching device Q8Is connected to the drain of the switching device Q5Drain electrode of the same-switch device Q7Is connected to the drain of the switching device Q6Source electrode of same switching device Q8The source electrodes of the first and second transistors are connected; switching device Q in first primary side inverter bridge1Drain electrode of (1), switching device Q3The drain electrode of the first primary side inverter bridge is connected with a switching device Q in a second primary side inverter bridge5Drain electrode of (1), switching device Q7The drains of the first primary inverter bridge are connected to form a node, and a switching device Q in the first primary inverter bridge2Source electrode of (1), switching device Q4The source electrode of the first primary side inverter bridge is connected with a switching device Q in a second primary side inverter bridge6Source electrode of (1), switching device Q8The source electrodes are connected to form a node II; the resonance and voltage conversion comprises a first resonance capacitor Cr1A second resonant capacitor Cr2The magnetic integrated structure I and the magnetic integrated structure II; the first secondary rectifier bridge comprises a rectifier diode Dr1Rectifier diode Dr2Rectifier diode Dr3Rectifier diode Dr4Rectifier diode Dr1Anode of the same rectifier diode Dr2Is connected to the cathode of a rectifier diode Dr3Anode of the same rectifier diode Dr4Is connected to the cathode of a rectifier diode Dr1Cathode of the same-rectifier diode Dr3Is connected to the cathode of a rectifier diode Dr2Anode of the same rectifier diode Dr4The anode of the anode is connected; the second secondary side rectifier bridge comprises a rectifier diode Dr5Rectifier diode Dr6Rectifier diode Dr7Rectifying the currentDiode Dr8Rectifier diode Dr5Anode of the same rectifier diode Dr6Is connected to the cathode of a rectifier diode Dr7Anode of the same rectifier diode Dr8Is connected to the cathode of a rectifier diode Dr5Cathode of the same-rectifier diode Dr7Is connected to the cathode of a rectifier diode Dr6Anode of the same rectifier diode Dr8The anode of the anode is connected; rectifier diode D in the first secondary rectifier bridger1Cathode of (2), rectifier diode Dr3The cathode of the rectifier is connected with a rectifier diode D in a second secondary side rectifier bridger5Cathode of (2), rectifier diode Dr7The cathodes of the two rectifying diodes are connected to form a node c, and the rectifying diode D in the first secondary side rectifier bridger2Anode of (2), rectifier diode Dr4The anode of the rectifier diode is connected with a rectifier diode D in a rectifier bridge of the second secondary sider6Anode of (2), rectifier diode Dr8The anodes are connected to form a node; the input filter capacitor CinIs connected with the first node and the second node; the output filter capacitor C0Connecting with the third node and the fourth node; the primary side direct current power supply VinSame-input filter capacitor CinConnecting; the output load R0Same-output filter capacitor C0Connecting; one port A 'of the magnetic integrated structure is connected with a port A of a first primary side inverter bridge, one port C' of the magnetic integrated structure is connected with a second port A of the magnetic integrated structure, and a second port B of the magnetic integrated structure is connected with a first resonant capacitor Cr1The magnetic integrated structure is connected with a first primary side inverter bridge port B, a second port C of the magnetic integrated structure is connected with a first secondary side rectifier bridge port C, a second port D of the magnetic integrated structure is connected with a first secondary side rectifier bridge port D, a first port B 'of the magnetic integrated structure is connected with a second primary side inverter bridge port E, a first port D' of the magnetic integrated structure is connected with a second port E of the magnetic integrated structure, and a second port F of the magnetic integrated structure is connected with a second resonant capacitor Cr2And the magnetic integrated structure is connected with a second primary side inverter bridge port F, a second port G of the magnetic integrated structure is connected with a second secondary side rectifier bridge port G, and a second port H of the magnetic integrated structure is connected with a second secondary side rectifier bridge port H.
Magnetism integrated structure one and magnetism integrated structure two the utility model discloses a main content, for two multiport structures, magnetism integrated structure one can adopt the structural style shown in FIG. 2, double-phase resonance inductance has been integrated in a magnetic core, magnetism integrated structure two can adopt the structural style shown in FIG. 3, double-phase transformer and excitation inductance have been integrated in a magnetic core, whole converter only contains two magnetic elements, in order to make things convenient for actual design and application, magnetic element's weight and volume have been reduced effectively, in order to make things convenient for actual design and application, the power density of converter has been improved.
Fig. 2 is a schematic structural view of the present invention, in which two-phase resonant inductors are magnetically integrated by using only one UIU-shaped magnetic core. The magnetic integrated structure I comprises a UIU magnetic core and a first resonant inductance winding Lr1A first winding L of a second resonant inductorr21A second resonant inductor second winding Lr22(ii) a The first resonant inductor winding Lr1Wound on the side pole I of the magnetic core, and a first winding L of a second resonant inductorr21A second resonant inductor winding L wound on the center pillar III of the magnetic corer22Winding on the magnetic core side post II; wherein the first resonant inductor winding Lr1One end of the first resonant inductor winding is used as a port A' of the first magnetic integrated structurer1The other end of the first resonant inductor is used as a port C' of the first magnetic integrated structure, and a first winding L of a second resonant inductorr21One end of the first resonant inductor is used as a port B' of the first magnetic integrated structure, and the first winding L of the second resonant inductorr21The other end is connected with a second winding L of a second resonant inductorr22Connected, second resonant inductor second winding Lr22The other end of the magnetic integrated structure I is used as a port D' of the magnetic integrated structure I; air gaps are formed between the UIU magnetic core column III and the magnetic column I and between the magnetic column III and the magnetic column II.
The magnetic flux generated by the first resonant inductance winding of the magnetic integrated structure I enhances the magnetic flux of the second resonant inductance second winding on the magnetic core side column II, the magnetic flux generated by the first resonant inductance winding reduces the magnetic flux of the second resonant inductance first winding on the magnetic core side column III, and the influence of the operation of the first resonant inductance on the operation of the second resonant inductance is mutually counteracted; through the rational design to second resonance inductance at II turns of magnetic core center pillar III and magnetic core side pillar, the magnetic flux that second resonance inductance first winding and second resonance inductance second winding produced offsets each other at magnetic core side pillar I's magnetic flux to first resonance inductance, the operation of second resonance inductance does not produce the influence to first resonance inductance operation, the decoupling zero integration of double-phase resonance inductance has been realized, the magnetic flux that magnetic integration rear side pillar II produced is the biggest, nevertheless because UIU type magnetic core side pillar II is wider than EE EI type magnetic core side pillar, so the saturation can reduce.
Fig. 3 is a schematic structural diagram of the present invention, in which two phase transformers and their excitation inductors are magnetically integrated by using only one I-shaped magnetic core. The magnetic integrated structure comprises an I-shaped magnetic core and a first primary winding NP1A first secondary winding NS1A first winding N of a second primary sideP21A second primary side second winding NP22A second secondary side first winding NS21A second secondary side second winding NS22(ii) a The first primary winding NP1Wound on the center pole III of the magnetic core, and a first secondary winding NS1A first winding N wound on the center post III of the magnetic coreP21A second primary winding N wound on the side pole I of the magnetic coreP22Wound on the side pole II of the magnetic core and a first winding N on the second secondary sideS21A second winding N wound on the side column I of the magnetic core and having a second secondary sideS22Winding on the magnetic core side post II; wherein the first primary winding NP1The same name end of the magnetic integrated structure is used as a two-port A of the magnetic integrated structure, and a first primary winding NP1The different name end of the magnetic integrated structure is used as a two-port B of the magnetic integrated structure, and a first secondary winding NS1The same name end of the magnetic integrated structure is used as a two-port C of the magnetic integrated structure, and a first secondary winding NS1The unlike terminal of the magnetic integrated structure is used as a two-port D of the magnetic integrated structure, and a first primary winding NP21The same name end of the first primary side is used as a second port E of the magnetic integrated structure, and a first winding N of a second primary sideP21The different name end of the first primary side is connected with a second primary side second winding NP22Are connected with the same name end of the first primary side second winding NP22The different name end of the magnetic integrated structure is used as a second port F of the magnetic integrated structure, and a first winding N of a second secondary sideS21The same name end of the first winding is used as a second port G of the magnetic integrated structure, and a first winding N of a second secondary sideS21The different name end of the first winding and the second secondary side of the second winding NS22Are connected with the same name end of the first winding NS22The synonym terminal of (1) is used as a two-port H of the magnetic integrated structure.
First primary winding N on center pillar III of two magnetic cores of magnetic integrated structureP1A first secondary winding NS1The generated magnetic flux and a second primary side first winding N on two side columns I and II of the magnetic coreP21A second primary side second winding NP22A second secondary side first winding NS21A second secondary side second winding NS22The generated magnetic fluxes are mutually offset, the operation of the two-phase transformer does not influence each other, and the decoupling integration of the two-phase transformer and the transformer is realized.
The first magnetic integrated structure and the second magnetic integrated structure are applied to the interleaved parallel full-bridge LLC resonant converter, but are not limited to the interleaved parallel full-bridge LLC resonant converter, and can be applied to magnetic integration of a resonant inductor and a resonant inductor in the magnetic integrated interleaved parallel full-bridge LLC resonant converter and magnetic integration of a transformer and a transformer in other embodiments. The natural deduction and variation combination of all the converters and magnetic integrated structure provided by the present invention is within the protection.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. The utility model discloses each part that mentions is the common technique in prior art, and the technical personnel of this trade should understand, the utility model discloses do not receive the restriction of above-mentioned embodiment, the description only is the explanation in above-mentioned embodiment and the description the principle of the utility model, under the prerequisite that does not deviate from the spirit and the scope of the utility model, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of claim the utility model is within the scope. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A magnetically integrated interleaved (LLC) resonant converter, comprising: primary side DC power supply VinAn input filter capacitor CinA first primary side inverter bridge, a second primary side inverter bridge, resonance and voltage transformation, a first secondary side rectifier bridge, a second secondary side rectifier bridge and an output filter capacitor C0Output load R0(ii) a The first primary side inverter bridge and the second primary side inverter bridge are connected in a resonant and voltage conversion manner, and the second primary side inverter bridge are connected in a resonant and voltage conversion mannerThe two primary side inverter bridges, the resonance and the voltage transformation are respectively connected with a first primary side inverter bridge, a second primary side inverter bridge, a first secondary side rectifier bridge and a second secondary side rectifier bridge, and the first secondary side rectifier bridge, the second secondary side rectifier bridge and the output filter capacitor C0Output load R0The first primary side inverter bridge and the second primary side inverter bridge are respectively connected with a primary side direct current power supply VinAn input filter capacitor CinConnecting; the resonance and voltage change device comprises a first magnetic integrated structure and a second magnetic integrated structure, wherein the first magnetic integrated structure integrates resonance inductance of the two-phase full-bridge LLC resonant converter in one magnetic core, and the second magnetic integrated structure integrates a transformer and excitation inductance of the two-phase full-bridge LLC resonant converter in one magnetic core;
the first primary side inverter bridge is composed of a switching device Q1Switching device Q2Switching device Q3Switching device Q4Composition of, the switching device Q1Source electrode of same switching device Q2Is connected to the drain of the switching device Q3Source electrode of same switching device Q4Is connected to the drain of the switching device Q1Drain electrode of the same-switch device Q3Is connected to the drain of the switching device Q2Source electrode of same switching device Q4The source electrodes of the first and second transistors are connected; the second primary side inverter bridge is composed of a switching device Q5Switching device Q6Switching device Q7Switching device Q8Composition of, the switching device Q5Source electrode of same switching device Q6Is connected to the drain of the switching device Q7Source electrode of same switching device Q8Is connected to the drain of the switching device Q5Drain electrode of the same-switch device Q7Is connected to the drain of the switching device Q6Source electrode of same switching device Q8The source electrodes of the first and second transistors are connected;
switching device Q in first primary side inverter bridge1Drain electrode of (1), switching device Q3The drain electrode of the first primary side inverter bridge is connected with a switching device Q in a second primary side inverter bridge5Drain electrode of (1), switching device Q7The drains of the first primary side inverter bridge are connected to form a node, and the switching device Q in the first primary side inverter bridge2Source electrode of (1), switching device Q4The source electrode of the first primary side inverter bridge is connected with a switching device Q in a second primary side inverter bridge6Source electrode of (1), switching device Q8The source electrodes are connected to form a node II;
the resonance and voltage conversion are realized by a first resonance capacitor Cr1A second resonant capacitor Cr2The magnetic integrated structure I and the magnetic integrated structure II are formed;
the first secondary rectifier bridge is composed of a rectifier diode Dr1Rectifier diode Dr2Rectifier diode Dr3Rectifier diode Dr4Composition of, the rectifier diode Dr1Anode of the same rectifier diode Dr2Is connected to the cathode of the rectifier diode Dr3Anode of the same rectifier diode Dr4Is connected to the cathode of the rectifier diode Dr1Cathode of the same-rectifier diode Dr3Is connected to the cathode of the rectifier diode Dr2Anode of the same rectifier diode Dr4The anode of the anode is connected; the second secondary side rectifier bridge is composed of a rectifier diode Dr5Rectifier diode Dr6Rectifier diode Dr7Rectifier diode Dr8Composition of, the rectifier diode Dr5Anode of the same rectifier diode Dr6Is connected to the cathode of the rectifier diode Dr7Anode of the same rectifier diode Dr8Is connected to the cathode of the rectifier diode Dr5Cathode of the same-rectifier diode Dr7Is connected to the cathode of the rectifier diode Dr6Anode of the same rectifier diode Dr8The anode of the anode is connected;
rectifier diode D in the first secondary rectifier bridger1Cathode of (2), rectifier diode Dr3The cathode of the rectifier is connected with a rectifier diode D in a second secondary side rectifier bridger5Cathode of (2), rectifier diode Dr7The cathodes of the first secondary rectifier bridge are connected to form a node c, and the rectifying diode D in the first secondary rectifier bridger2Anode of (2), rectifier diode Dr4The anode of the rectifier diode is connected with a rectifier diode D in a rectifier bridge of the second secondary sider6Anode of (2), rectifier diode Dr8The anodes of the two-way valve are connected to form a node;
the input filterWave capacitor CinIs connected with the first node and the second node;
the output filter capacitor C0Connecting with the third node and the fourth node;
the primary side direct current power supply VinSame-input filter capacitor CinConnecting;
the output load R0Same-output filter capacitor C0Connecting;
one port A 'of the magnetic integrated structure is connected with a port A of a first primary side inverter bridge, one port C' of the magnetic integrated structure is connected with a second port A of the magnetic integrated structure, and a second port B of the magnetic integrated structure is connected with a first resonant capacitor Cr1The magnetic integrated structure is connected with a first primary side inverter bridge port B, a second port C of the magnetic integrated structure is connected with a first secondary side rectifier bridge port C, a second port D of the magnetic integrated structure is connected with a first secondary side rectifier bridge port D, a first port B 'of the magnetic integrated structure is connected with a second primary side inverter bridge port E, a first port D' of the magnetic integrated structure is connected with a second port E of the magnetic integrated structure, and a second port F of the magnetic integrated structure is connected with a second resonant capacitor Cr2And the magnetic integrated structure is connected with a second primary side inverter bridge port F, a second port G of the magnetic integrated structure is connected with a second secondary side rectifier bridge port G, and a second port H of the magnetic integrated structure is connected with a second secondary side rectifier bridge port H.
2. The magnetic integrated interleaved LLC resonant converter according to claim 1, wherein the first primary-side inverter bridge, the first resonant capacitor, the first secondary-side rectifier bridge, the resonant inductor, and the transformer form a first-phase full-bridge LLC resonant converter, the second primary-side inverter bridge, the second resonant capacitor, the second secondary-side rectifier bridge, the resonant inductor, and the transformer form a second-phase full-bridge LLC resonant converter, and the first-phase full-bridge LLC resonant converter and the second-phase full-bridge LLC resonant converter are connected in parallel at input ends and output ends.
3. A magnetically integrated interleaved LLC resonant converter according to claim 1, wherein said magnetically integrated structure consists of a UIU core, a first pole, and a second poleA resonant inductor winding Lr1A first winding L of a second resonant inductorr21A second resonant inductor second winding Lr22Composition is carried out; the first resonant inductor winding Lr1Wound on the side column I of the magnetic core, and the first winding L of the second resonant inductorr21Wound on the center pillar III of the magnetic core, and a second winding L of the second resonant inductorr22Winding on the magnetic core side post II; wherein the first resonant inductor winding Lr1One end of the first resonant inductor winding is used as a port A' of the first magnetic integrated structurer1The other end of the first resonant inductor is used as a port C' of the first magnetic integrated structure, and a first winding L of a second resonant inductorr21One end of the first resonant inductor is used as a port B' of the first magnetic integrated structure, and the first winding L of the second resonant inductorr21The other end is connected with a second winding L of a second resonant inductorr22Connected, second resonant inductor second winding Lr22The other end of the magnetic integrated structure I is used as a port D' of the magnetic integrated structure I; and air gaps are formed between the UIU magnetic core column III and the magnetic column I and between the magnetic column III and the magnetic column II.
4. A magnetically integrated interleaved LLC resonant converter according to claim 1, wherein said second magnetically integrated structure comprises an I-shaped core and a first primary winding NP1A first secondary winding NS1A first winding N of a second primary sideP21A second primary side second winding NP22A second secondary side first winding NS21A second secondary side second winding NS22Composition is carried out;
the first primary winding NP1Wound on the center pillar III of the magnetic core, and the first secondary winding NS1Wound on the center pillar III of the magnetic core, and the first winding N of the second primary sideP21Wound on the side post I of the magnetic core, and the second primary side secondary winding NP22Wound on a side column II of the magnetic core, and a first winding N of the second secondary sideS21Wound on the side column I of the magnetic core, and a second winding N on the second secondary sideS22Winding on the magnetic core side post II;
wherein the first primary winding NP1The same name end of the first primary winding is used as a two-port A of the magnetic integrated structure, and the first primary winding NP1The different name end of the magnetic integrated structure is used as a two-port B of the magnetic integrated structureThe first secondary winding NS1The same name end of the first secondary winding is used as a two-port C of the magnetic integrated structure, and the first secondary winding NS1The different name end of the magnetic integrated structure is used as a two-port D of the magnetic integrated structure, and the second primary side first winding NP21The same name end of the first primary side is used as a second port E of the magnetic integrated structure, and the first primary side of the second primary side is used as a first winding NP21The different name end of the first primary side is connected with a second primary side second winding NP22Are connected with the same name end of the first primary side second winding NP22The end with different name is used as a second port F of the magnetic integrated structure, and the first winding N of the second secondary sideS21The same name end of the first winding is used as a second port G of the magnetic integrated structure, and the second secondary side of the first winding N is used as a first winding NS21The different name end of the first winding and the second secondary side of the second winding NS22Are connected with the same name end, the second winding NS22The synonym terminal of (1) is used as a two-port H of the magnetic integrated structure.
5. A magnetically integrated interleaved LLC resonant converter according to claim 1 or 4, wherein the magnetic core of said second magnetically integrated structure is an I-shaped magnetic core structure comprising two opposite U-shaped magnetic cores and two I-shaped magnetic cores, the two opposite U-shaped magnetic cores of said second magnetically integrated structure are tightly connected without an air gap to form an I-shaped magnetic core, and are located between the two I-shaped magnetic cores, and an air gap is provided between the two I-shaped magnetic cores and the opening of the I-shaped magnetic core.
6. A magnetic integrated interleaved LLC resonant converter according to claim 1, wherein said first and second primary inverter bridges are frequency-variable controlled, phase-shifted controlled, frequency-variable + phase-shifted controlled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120131624.2U CN215120573U (en) | 2021-01-18 | 2021-01-18 | Magnetic integration interleaved LLC resonant converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751489A (en) * | 2021-01-18 | 2021-05-04 | 天津工业大学 | Magnetic integration interleaved LLC resonant converter |
| CN114268226A (en) * | 2022-01-10 | 2022-04-01 | 中国矿业大学 | Magnetic integration planar transformer based on CLLC circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751489A (en) * | 2021-01-18 | 2021-05-04 | 天津工业大学 | Magnetic integration interleaved LLC resonant converter |
| CN114268226A (en) * | 2022-01-10 | 2022-04-01 | 中国矿业大学 | Magnetic integration planar transformer based on CLLC circuit |
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