CN208316418U - A kind of wireless charging LCC compensation circuit and its radiator structure - Google Patents

A kind of wireless charging LCC compensation circuit and its radiator structure Download PDF

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Publication number
CN208316418U
CN208316418U CN201821050145.2U CN201821050145U CN208316418U CN 208316418 U CN208316418 U CN 208316418U CN 201821050145 U CN201821050145 U CN 201821050145U CN 208316418 U CN208316418 U CN 208316418U
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China
Prior art keywords
wireless charging
compensation circuit
coil
lcc
resonant inductance
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CN201821050145.2U
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Chinese (zh)
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苏宏业
马龙华
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Zhejiang Zhong Chuang Tiancheng Technology Co Ltd
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Zhejiang Zhong Chuang Tiancheng Technology Co Ltd
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Abstract

The utility model discloses a kind of wireless charging LCC compensation circuit and its radiator structure, wireless charging LCC compensation circuit includes wireless charging energy transmitting end LCC compensation circuit and receiving end LCC compensation circuit;Transmitting terminal LCC compensation circuit includes resonant inductance Lf1, resonant capacitance Cf1, compensating electric capacity Cp1With primary side transmitting coil L1;Receiving end LCC compensation circuit includes resonant inductance Lf2, resonant capacitance Cf2, compensating electric capacity Cp2With secondary side receiving coil L2;Resonant inductance Lf1And Lf2Structure is identical, is wireless charging high-frequency resonant inductance;The wireless charging high-frequency resonant inductance includes EE type magnetic core, insulating trip and circular coil;The radiator structure of wireless charging LCC compensation circuit includes LCC capacitor board, cooling fin, radiator, insulating ceramic film and two radiator fans;The utility model devises a kind of high-frequency resonant induction structure and its entire circuit heat dissipation structure, solves the problems, such as to generate heat in LCC compensation circuit serious, improves the stability of LCC compensation circuit.

Description

A kind of wireless charging LCC compensation circuit and its radiator structure
Technical field
The utility model belong to wireless power transmission technical field more particularly to a kind of wireless charging LCC compensation circuit and Its radiator structure.
Background technique
Due to problem of environmental pollution and petroleum resources problem, electric car industry starts to recover.Relative to fuel vehicle, electricity Electrical automobile has zero-emission, reduces noise pollution, the advantages such as automobile component is few, reliability is high, type be broadly divided into pure electric vehicle, Fuel cell and mixed motivity type.Rapid application due to electric car in the fields such as private car and public transport, it is involved Battery boosting technology become the important foundation support system and electric vehicle industrialization and commercialization process of electric car Important link.
In this background, charging batteries of electric automobile technology obtains very fast development.Wireless charging skill at this stage Art is held in both hands by everybody heat, plays important application in many occasions.However, first, EMR electromagnetic resonance manifold type wireless charging As one kind important in wireless charging technology, when designing charging system, since the resonance current in LCC compensation circuit is handed over Flow component is very big, almost without DC component, so that inductance currently on the market generates heat seriously in use, it cannot Meet requirement.Second, at present wireless charging working frequency in 85KHz, even up to MHz, in the market can for a long time The inductance fever of work in high frequency is serious, is not able to satisfy requirement.Based on the above two o'clock, a reliable wireless charging is designed Electric LCC compensation circuit and its radiator structure are of crucial importance.
Summary of the invention
The characteristics of the utility model combining wireless charging technique, to solve the problems of the prior art, in wireless charging LCC In compensation circuit, by designing a kind of high-frequency resonant inductance and its entire circuit heat dissipation structure, solves and sent out in LCC compensation circuit The serious problem of heat, improves the stability of LCC compensation circuit.
To achieve the above object, the technical solution of the utility model is as follows: a kind of wireless charging LCC compensation circuit, including Wireless charging energy transmitting end LCC compensation circuit and receiving end LCC compensation circuit;The transmitting terminal LCC compensation circuit includes humorous Shake inductance Lf1, resonant capacitance Cf1, compensating electric capacity Cp1With primary side transmitting coil L1;The receiving end LCC compensation circuit includes resonance Inductance Lf2, resonant capacitance Cf2, compensating electric capacity Cp2With secondary side receiving coil L2;The resonant inductance Lf1And Lf2Structure is identical, is Wireless charging high-frequency resonant inductance;The wireless charging high-frequency resonant inductance includes EE type magnetic core, insulating trip and circular coil, institute Stating EE type magnetic core is that two E-type magnetic cores are opposite in opening and consistency from top to bottom is installed, and the circular coil is vertical structure, by Inner coil and outer coil combination are wound on E-type magnetic core center pillar, and it is exhausted that the inner coil of the circular coil is wound on package On the E-type magnetic core center pillar of edge paper, the outer coil is wound on the inner coil of package insulating paper, on the outer coil again Wrap up one layer of insulating paper;The inner coil and outer coil are interlaced coiling on E-type magnetic core center pillar;The round wire Circle is formed by big stock litz wire coiling, and whole package insulating paper forms insulating layer, the big dividend outside the big stock litz wire Hereby line is twisted by 8-19 root shallow bid litz wire, and the shallow bid litz wire is twisted by 3-7 root enameled wire;The insulating trip It is placed among E-type magnetic core opening face, generates air gap when fixed for magnetic core, adjust gas by adjusting the thickness of insulating trip The size of gap.
Further, in the transmitting terminal LCC compensation circuit, compensating electric capacity Cp1With primary side transmitting coil L1After series connection with it is humorous Shake capacitor Cf1Parallel connection, then with resonant inductance Lf1Series connection;In the receiving end LCC compensation circuit, compensating electric capacity Cp2It is received with secondary side Coil L2After series connection with resonant capacitance Cf2Parallel connection, then with resonant inductance Lf2Series connection.
Further, the air gap between two E-type magnetic cores is 2-3mm.
Further, the wireless charging high-frequency resonant inductance working frequency is 75-100kHz.
Further, the wireless charging high-frequency resonant inductance sensibility reciprocal is 40-50uH.
A kind of radiator structure of wireless charging LCC compensation circuit, including LCC capacitor board, cooling fin, radiator, insulation pottery Tile and two radiator fans;Wireless charging high-frequency resonant inductance connects composition LCC resonance electricity with LCC capacitor board by litz wire Road, the cooling fin are wrapped on the outside of wireless charging high-frequency resonant inductance, cooling fin and wireless charging high-frequency resonant inductance it Between fill heat conductive silica gel;The LCC capacitor board is rectangle circuit board, and there are peel off solder mask on the bottom surface layer of circuit board quadrangle Copper foil, coat silicone grease in copper foil surface, 1-2 piece insulating ceramic film be installed, and fill silicone grease in insulating ceramics on piece, pass through spiral shell Adjusting screw is by circuit board Corner Strapped on the cooling fin for being coated with silicone grease;Thermal conductive silicon is provided between the cooling fin and radiator Cooling fin and radiator are fixed together by rouge by screw;Two radiator fans are individually positioned in radiator both ends, fan Wind direction at air outlet it is identical.
Compared with prior art, the utility model at least has the advantages that the utility model by using special The litz wire of coiling can be good at eliminating electric current kelvin effect caused by under high frequency magnetic field and kindred effect bring seriously handed over Stream loss, can be effectively reduced transformer temperature rise;By the way that LCC compensation circuit is divided into LCC capacitor board and high-frequency resonant inductance two Part individually heat dissipation, effectively improves heat dissipation effect, the temperature rise of circuit can be effectively reduced, between improving system long-time not The stability of disconnected operation.
Detailed description of the invention
Fig. 1 is wireless charging LCC compensation circuit schematic diagram;
Fig. 2 is wireless charging high-frequency resonant inductance schematic diagram;
Fig. 3 is wireless charging high-frequency resonant inductance radiator structure scheme of installation;
Fig. 4 is wireless charging high-frequency resonant inductance and cooling fin scheme of installation;
Fig. 5 is LCC capacitor board heat dissipation scheme of installation.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, a kind of wireless charging LCC compensation circuit provided by the invention, including wireless charging energy transmitting end LCC compensation circuit 1 and receiving end LCC compensation circuit 2;The transmitting terminal LCC compensation circuit 1 includes resonant inductance Lf1, resonance electricity Hold Cf1, compensating electric capacity Cp1With primary side transmitting coil L1;The receiving end LCC compensation circuit 2 includes resonant inductance Lf2, resonance electricity Hold Cf2, compensating electric capacity Cp2With secondary side receiving coil L2;In the transmitting terminal LCC compensation circuit 1, compensating electric capacity Cp1It is sent out with primary side Ray circle L1After series connection with resonant capacitance Cf1Parallel connection, then with resonant inductance Lf1Series connection;In the receiving end LCC compensation circuit 2, mend Repay capacitor Cp2With secondary side receiving coil L2After series connection with resonant capacitance Cf2Parallel connection, then with resonant inductance Lf2Series connection;LCC compensation electricity Road need to meet following formula,
Wherein ω0For inverter working frequency, L1And L2For the sensibility reciprocal of transmitting coil and receiving coil, Cf1And Cf2Respectively Transmitting terminal and receiving end parallel resonance capacitance, Cp1And Cp2Respectively transmitting terminal and receiving end series compensation capacitance value, Lf1And Lf2 For the sensibility reciprocal of transmitting terminal and receiving end resonance coil.
The resonant inductance Lf1And Lf2Structure is identical, is wireless charging high-frequency resonant inductance 3.As shown in Fig. 2, described Wireless charging high-frequency resonant inductance 3 includes EE type magnetic core, insulating trip and circular coil 4, and the EE type magnetic core is two E-type magnetic cores 5 install in the opposite simultaneously consistency from top to bottom of opening, and the circular coil 4 is vertical structure, by inner coil and outer coil group Conjunction is wound on E-type magnetic core center pillar, and the inner coil of the circular coil is wound on the E-type magnetic core center pillar of package insulating paper, The outer coil is wound on the inner coil of package insulating paper, wraps up one layer of insulating paper on the outer coil again;It is described Inner coil and outer coil are interlaced coiling on E-type magnetic core center pillar;The circular coil is by big stock litz wire coiling It forms, whole package insulating paper forms insulating layer outside the big stock litz wire, and the big stock litz wire is by the small dividend of 8-19 root Hereby line is twisted, and the shallow bid litz wire is twisted by 3-7 root enameled wire;The insulating trip is placed on E-type magnetic core opening Among face, air gap 6 is generated when fixed for magnetic core, the size of air gap 6 is adjusted by adjusting the thickness of insulating trip;Two E Air gap 6 between type magnetic core is 2-3mm;3 working frequency of wireless charging high-frequency resonant inductance is 75-100kHz, and sensibility reciprocal is 40-50uH。
As shown in figure 3, a kind of radiator structure of wireless charging LCC compensation circuit provided by the invention, including LCC capacitor board 7, cooling fin 8, radiator 9, insulating ceramic film 10 and two radiator fans 11;Wireless charging high-frequency resonant inductance 3 passes through Ritz Line and the connection composition LCC resonance circuit of LCC capacitor board 7, as shown in figure 4, the cooling fin 8 is wrapped in wireless charging high-frequency resonant 3 outside of inductance, fills heat conductive silica gel 12 between cooling fin 8 and wireless charging high-frequency resonant inductance 3;As shown in figure 5, described LCC capacitor board 7 is rectangle circuit board, and there are the copper foils for peelling off solder mask on the bottom surface layer of circuit board quadrangle, in copper foil surface Silicone grease is coated, 1-2 piece insulating ceramic film 10 is installed, and fill silicone grease 14 on insulating ceramic film 10, it will be electric by screw 13 Road plate Corner Strapped is on the cooling fin 8 for being coated with silicone grease;It is provided with heat-conducting silicone grease between the cooling fin 8 and radiator 9, is passed through Cooling fin and radiator are fixed together by screw;Two radiator fans 11 are individually positioned in 9 both ends of radiator, radiator fan 11 wind direction at air outlet is identical.
Above-described embodiment is the explanation to the utility model, is not the restriction to the utility model, and any pair of sheet is practical new Scheme after type simple transformation belongs to the protection scope of the utility model.

Claims (6)

1. a kind of wireless charging LCC compensation circuit, which is characterized in that including wireless charging energy transmitting end LCC compensation circuit and Receiving end LCC compensation circuit;The transmitting terminal LCC compensation circuit includes resonant inductance Lf1, resonant capacitance Cf1, compensating electric capacity Cp1 With primary side transmitting coil L1;The receiving end LCC compensation circuit includes resonant inductance Lf2, resonant capacitance Cf2, compensating electric capacity Cp2With Secondary side receiving coil L2;The resonant inductance Lf1And Lf2Structure is identical, is wireless charging high-frequency resonant inductance;The wireless charging Electric high-frequency resonant inductance includes EE type magnetic core, insulating trip and circular coil, and the EE type magnetic core is two E-type magnetic cores in opening phase Simultaneously consistency from top to bottom is installed, the circular coil is vertical structure, is combined by inner coil and outer coil and is wound on E type On magnetic core center pillar, the inner coil of the circular coil is wound on the E-type magnetic core center pillar of package insulating paper, the outer coil It is wound on the inner coil of package insulating paper, wraps up one layer of insulating paper on the outer coil again;The inner coil and outer Layer line circle is interlaced coiling on E-type magnetic core center pillar;The circular coil is formed by big stock litz wire coiling, the big stock Whole package insulating paper forms insulating layer outside litz wire, and the big stock litz wire is twisted by 8-19 root shallow bid litz wire, The shallow bid litz wire is twisted by 3-7 root enameled wire;The insulating trip is placed among E-type magnetic core opening face, is used for Magnetic core generates air gap when fixed, and the size of air gap is adjusted by adjusting the thickness of insulating trip.
2. a kind of wireless charging LCC compensation circuit according to claim 1, which is characterized in that the transmitting terminal LCC compensation In circuit, compensating electric capacity Cp1With primary side transmitting coil L1After series connection with resonant capacitance Cf1Parallel connection, then with resonant inductance Lf1Series connection; In the receiving end LCC compensation circuit, compensating electric capacity Cp2With secondary side receiving coil L2After series connection with resonant capacitance Cf2Parallel connection, then with Resonant inductance Lf2Series connection.
3. a kind of wireless charging LCC compensation circuit according to claim 1, which is characterized in that between two E-type magnetic cores Air gap is 2-3mm.
4. a kind of wireless charging LCC compensation circuit according to claim 1, which is characterized in that the wireless charging high frequency Resonant inductance working frequency is 75-100kHz.
5. a kind of wireless charging LCC compensation circuit according to claim 1, which is characterized in that the wireless charging high frequency Resonant inductance sensibility reciprocal is 40-50uH.
6. a kind of radiator structure of any one of claim 1-5 wireless charging LCC compensation circuit, which is characterized in that including LCC capacitor board, cooling fin, radiator, insulating ceramic film and two radiator fans;Wireless charging high-frequency resonant inductance passes through Ritz Line connects composition LCC resonance circuit with LCC capacitor board, and the cooling fin is wrapped on the outside of wireless charging high-frequency resonant inductance, Heat conductive silica gel is filled between cooling fin and wireless charging high-frequency resonant inductance;The LCC capacitor board is rectangle circuit board, circuit There are the copper foils for peelling off solder mask on the bottom surface layer of plate quadrangle, coat silicone grease in copper foil surface, install 1-2 piece insulating ceramic film, And fill silicone grease in insulating ceramics on piece, by screw by circuit board Corner Strapped on the cooling fin for being coated with silicone grease;It is described It is provided with heat-conducting silicone grease between cooling fin and radiator, cooling fin and radiator are fixed together by screw;Two dissipate Hot-air fan is individually positioned in radiator both ends, and the wind direction at air outlet of fan is identical.
CN201821050145.2U 2018-07-03 2018-07-03 A kind of wireless charging LCC compensation circuit and its radiator structure Active CN208316418U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110635573A (en) * 2019-09-23 2019-12-31 重庆大学 Sleeve pair-embedded electric field coupling mechanism and EC-WPT system formed by same
CN111404382A (en) * 2019-05-21 2020-07-10 镁蓝科技(上海)有限公司 Switching power supply circuit
CN111584220A (en) * 2020-05-18 2020-08-25 华中科技大学 High-power wireless charging magnetic coupling mechanism and electric energy transmission system thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111404382A (en) * 2019-05-21 2020-07-10 镁蓝科技(上海)有限公司 Switching power supply circuit
CN110635573A (en) * 2019-09-23 2019-12-31 重庆大学 Sleeve pair-embedded electric field coupling mechanism and EC-WPT system formed by same
CN110635573B (en) * 2019-09-23 2021-02-19 重庆大学 Sleeve pair-embedded electric field coupling mechanism and EC-WPT system formed by same
CN111584220A (en) * 2020-05-18 2020-08-25 华中科技大学 High-power wireless charging magnetic coupling mechanism and electric energy transmission system thereof

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