CN107220446A - A kind of single-shot penetrates the modeling method to the static wireless power supply system of four receiving coil electric automobiles - Google Patents
A kind of single-shot penetrates the modeling method to the static wireless power supply system of four receiving coil electric automobiles Download PDFInfo
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- CN107220446A CN107220446A CN201710409885.4A CN201710409885A CN107220446A CN 107220446 A CN107220446 A CN 107220446A CN 201710409885 A CN201710409885 A CN 201710409885A CN 107220446 A CN107220446 A CN 107220446A
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Abstract
The present invention discloses a kind of single-shot and penetrates design and modeling method to the static wireless power supply system topological structure of four receiving coil electric automobiles, it is characterised in that：The topological structure is made up of a big transmitting coil, four small receiving coils and four rectifier bridges, and four small receiving coils are positioned over same plane, and parallel in transmitting coil, and four rectification bridge output end voltages are sequentially connected in series.Single-shot, which is penetrated to the transmitting coil and receiving coil of four receiving coil structures, to be made up of circular or square multiturn coil；Simultaneously for described topological structure, it is proposed that corresponding Mathematical Modeling Methods.The advantage of the structure is：When receiving coil and transmitting coil shift, the output voltage substantially constant of system.The beneficial effects of the invention are as follows：Simple in construction, highly reliable, system output voltage substantially constant, it is adaptable to electric automobile static state wireless charging.
Description
Technical field
Penetrate static to four receiving coil electric automobiles wireless the present invention relates to wireless power transmission field, more particularly to single-shot
The design and modeling method of electric power system topological structure.
Background technology
Charging system is one of core component of electric automobile, and the quality of its performance directly affects the safety of electric automobile
Property and convenience.Currently, the charging modes of electric automobile mainly have two kinds：The wired charging modes of plug-in and wireless charging side
Formula.The subject matter of the wired charging modes of plug-in is as follows：(1) significantly reduced due to the presence of charging socket and cable
The flexibility of charging electric vehicle；(2) larger charging current constitutes the potential danger of electric leakage and electric shock, easily produces contact
Spark, security is not strong.Wireless charging mode mainly transmits electric energy by magnetic field, and feeder ear and load end do not need wire
Be directly connected to, and then socket and plug can be saved.Load end and feeder ear can be carried out intelligence by network instruction and connected
Connect, it is easier to realize intelligent power supply.However, in electric automobile stopping for charging, transmitting coil and receiving coil are inevitably
Skew is produced, causes the Distribution of Magnetic Field between coil to change, and then causes output end voltage big ups and downs and efficiency to decline,
Jeopardize the security and stability of electric automobile dynamic radio electric power system.So, how to ensure coil when coil shifts
Between magnetic field it is relatively uniform, maintain output voltage stabilization and higher efficiency be a problem.
The content of the invention
In view of the shortcomings of the prior art, penetrated it is an object of the invention to provide a kind of single-shot to four receiving coil electric automobiles
The Topology Structure Design and modeling method of static wireless power supply system.
A kind of single-shot penetrates the Topology Structure Design and modeling side to the static wireless power supply system of four receiving coil electric automobiles
Method, it is characterised in that：
1) design and modeling method of a kind of static wireless charging topological structure of electric automobile, it is characterised in that：It is described to open up
Flutterring structure is made up of a big transmitting coil, four small receiving coils and four rectifier bridges, four small receiving coils
Same plane is positioned over, and it is parallel in transmitting coil.After four rectified bridges of small receiving coil, its rear end output voltage is successively
Series connection, powering load.
2) it is by circular or square multiturn coil structure that new single-shot, which is penetrated to four transmitting coils for receiving rear end cascade connection type system,
Into it is also to be made up of circular or square multiturn coil that new single-shot, which is penetrated to four receiving coils for receiving rear end cascade connection type system,.
3) propose that a kind of new single-shot is penetrated to four Mathematical Modeling Methods for receiving rear end series-connected structure.
The beneficial effects of the invention are as follows：Simple in construction, highly reliable, output voltage substantially constant, system effectiveness are high, very
Suitable for the static wireless charging of electric automobile.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the quasi- uniform magnetic field topological structure of the static wireless power supply system of novel electric vehicle；
Fig. 2 is that new single-shot is penetrated to the quasi- uniform magnetic field topological structure of four reception types when shifting；
Fig. 3 is that new single-shot is penetrated to four reception rear end cascade connection type topology diagrams；
Fig. 4 is that new single-shot is penetrated to four reception rear end cascade connection type equivalent circuit diagrams；
The front end input voltage waveform figure of Fig. 5 receiving coils；
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
(1) new single-shot is penetrated to four reception type topological structures
A kind of single-shot of the present invention is penetrated to the Topology Structure Design of the static wireless power supply system of four receiving coil electric automobiles such as
Shown in Fig. 1, it is by circle (or square multiturn coil) transmitting coil (Tx) one big and four small circle (or square multiturn
Coil) receiving coil (Rx_1, Rx_2, Rx_3 and Rx_4) composition.The structure and size of four receiving coils are all identical, Rx_1 and
Rx_3 is symmetrical on Y-axis, and Rx_2 and Rx_4 are also symmetrical on Y-axis, and Rx_1 and Rx_2 are symmetrical on Z axis, Rx_1 and Rx_4
It is symmetrical on Z axis, four receiving coils are positioned over approximately the same plane, and receiving coil is placed in parallel with transmitting coil.O ' is to connect
The center of take-up circle, Oi(i=1,2,3,4) be respectively each receiving coil center.Δ1It is Rx_1 center and the level of Z axis
Vertical range, Δ2It is Rx_2 center and the horizontal vertical distance of Z axis.A is the radius of transmitting coil, and b is the half of receiving coil
Footpath, D is the distance between receiving coil and transmitting coil.
Fig. 2 shows the schematic diagram that reception device is moved to Y direction, Δ be the level that moves right of reception device away from
From.Work as Δ<2b, when Δ is bigger, Δ1Smaller, now the horizontal-shift in the Rx_1 or Rx_3 and Tx centers of circle is smaller, mutual between them
Sense can become big；When Δ is bigger, Δ2Smaller, now the horizontal-shift in the Rx_2 or Rx_4 and Tx centers of circle is bigger, mutual between them
Sense can diminish.Its total mutual inductance is basically unchanged.
Fig. 3 shows that new single-shot is penetrated to four topology diagrams for receiving rear end cascade connection type, and transmitting coil is one big
Circular or square multiturn coil, receiving coil is also to be made up of circular or square multiturn coil.After four receiving coils are rectified
Couple successively in a series arrangement, RLIt is load resistance.Each coil can be equivalent into RLC (resistance, inductance, electric capacity) circuit,
Its equivalent circuit diagram is as shown in Figure 4.
New single-shot, which is penetrated, receives the equivalent circuit of rear end cascade connection type system to four by AC-AC modules (1) and AC-DC module
(2) constitute.The AC-AC modules (1) are by power module (10), transmitting coil Tx (11), receiving coil Rx_1 (12), reception line
Enclose Rx_2 (13), receiving coil Rx_3 (14), receiving coil Rx_4 (15) compositions；The AC-DC module (2) is by rectifier bridge
(21), rectifier bridge (22), rectifier bridge (23), rectifier bridge (24), load (25) are constituted.Power module (10) is through electric capacity C1With transmitting
Coil (11) is connected, and electric energy is transferred to receiving coil Rx_1 (12), receiving coil Rx_2 by transmitting coil (11) through magnetic coupling
(13), receiving coil Rx_3 (14), receiving coil Rx_4 (15).Receiving coil Rx_1 (12) is through electric capacity C2With rectifier bridge (21)
It is connected；Receiving coil Rx_2 (13) is through electric capacity C3It is connected with rectifier bridge (22)；Receiving coil Rx_3 (14) is through electric capacity C4With rectifier bridge
(23) it is connected；Receiving coil Rx_4 (15) is through electric capacity C5It is connected with rectifier bridge (24).Rectifier bridge (21), rectifier bridge (22), rectification
Bridge (23), rectifier bridge (24) are sequentially connected in series to be connected with load (25).
(2) new single-shot is penetrated to four reception type Topology Structure Modeling methods
With Kirchhoff's second law, new single-shot can be obtained and penetrated to four reception cascade connection type fore-ends (AC-AC)
Equation it is as follows：
VoIt is the voltage on load resistance, IoIt is the electric current on load resistance, α2It is V2And I2Between phase angle, α3It is V3
And I3Between phase angle, α4It is V4And I4Between phase angle, α5It is V5And I5Between phase angle.
When the operation of wireless wire transfer system is in resonant condition, following formula can be obtained：
α2=α3=α4=α5=0 (3)
Due to receiving coil it is rectified after be to couple in a series arrangement, it is possible to obtain electric current on each receiving coil
Relational expression is as follows：
I2=I3=I4=I5 (4)
Front end input voltage (the V of each receiving coil2,V3,V4,V5) it is square wave, Fig. 5 shows V2Oscillogram.U2_mIt is
The maximum amplitude of square wave, T is the cycle of square wave, according to Fourier space, V2It can be represented with following formula：
ω is fundamental wave angular frequency in formula.
According to formula (5), the virtual value and rectifier bridge front end input voltage of each rectifier bridge front end input voltage can be obtained
The relation of maximum is as follows：
Each rectifier bridge front end input voltage is square wave, can obtain each rectifier bridge front end input voltage (V2, V3,V4,
V5) and each rectifier bridge rear end output voltage (Vo2,Vo3,Vo4,Vo5) relational expression it is as follows：
According to formula (1)-formula (7), the I on coil can be received2With the electric current I on load resistanceoRelational expression such as
Under：
|Io|=0.9 | I2| (8)
According to formula (1)-formula (8), the mathematical modeling of novel system is as follows：
By solving formula (9), electric current I on transmitting coil can be obtained1With the electric current I on receiving coil2It is as follows：
A=j ω M in formula12+jωM13+jωM14+jωM15, B=Z2+Z3+Z4+Z5+0.81RL.
According to formula (10), the voltage expression that can be obtained on load resistance is as follows：
When can be seen that from formula (11) as A and B constant, output voltage VoAlso it is basically unchanged.Therefore, receiving coil is worked as
When being shifted with transmitting coil, with the topological structure of proposition, the output voltage substantially constant of wireless charging system, is new
The constant voltage output of structure provides theoretical foundation.
Illustrate that the preferred embodiment of this invention, including inventor are used to implement best modes known of the invention herein.
The change of preferred embodiment is obvious after reading the above description for those of ordinary skill in the art.Inventor wishes
Hope those of ordinary skill's rationally application is such to change, and inventor thinks that the application different from clearly stating herein can also
Realize the present invention.Therefore, the present invention includes all modifications and equivalents of purport cited in appended claims, this
It is allowed in applicable law.In addition, any combinations of all possible change of above-mentioned key element are also included by the present invention,
It is unless otherwise indicated herein or clearly contradicted within a context.
Claims (4)
1. a kind of single-shot penetrates the Topology Structure Design and modeling method to the static wireless power supply system of four receiving coil electric automobiles,
It is characterized in that：The topological structure is made up of a big transmitting coil, four small receiving coils and four rectifier bridges,
Four small receiving coils are positioned over same plane, and parallel in transmitting coil.After four rectified bridges of small receiving coil, its
Rear end output voltage is sequentially connected in series, powering load.
2. for described novel topological structure, it is proposed that corresponding Mathematical Modeling Methods.Mathematical modeling is as follows：
With Kirchhoff's second law, new single-shot can be obtained and penetrated to four sides for receiving cascade connection type fore-end (AC-AC)
Journey is as follows：
VoIt is the voltage on load resistance, IoIt is the electric current on load resistance, α2It is V2And I2Between phase angle, α3It is V3And I3
Between phase angle, α4It is V4And I4Between phase angle, α5It is V5And I5Between phase angle.
When the operation of wireless wire transfer system is in resonant condition, following formula can be obtained：
α2=α3=α4=α5=0 (3)
Due to receiving coil it is rectified after be to couple in a series arrangement, it is possible to obtain the relation of electric current on each receiving coil
Formula is as follows：
I2=I3=I4=I5 (4)
Front end input voltage (the V of each receiving coil2,V3,V4,V5) it is square wave, with reference to Fig. 5, U2_mIt is the maximum amplitude of square wave, T
It it is the cycle of square wave, according to Fourier space, V2It can be represented with following formula：
ω is fundamental wave angular frequency in formula.
According to formula (5), the virtual value and rectifier bridge front end input voltage that can obtain each rectifier bridge front end input voltage are maximum
The relation of value is as follows：
Each rectifier bridge front end input voltage is square wave, can obtain each rectifier bridge front end input voltage (V2,V3,V4,V5) with
Each rectifier bridge rear end output voltage (Vo2,Vo3,Vo4,Vo5) relational expression it is as follows：
According to formula (1)-formula (7), the I on coil can be received2With the electric current I on load resistanceoRelational expression it is as follows：
|Io|=0.9 | I2| (8)
According to formula (1)-formula (8), the mathematical modeling of novel system is as follows：
By solving formula (9), electric current I on transmitting coil can be obtained1With the electric current I on receiving coil2It is as follows：
A=j ω M in formula12+jωM13+jωM14+jωM15, B=Z2+Z3+Z4+Z5+0.81RL.
According to formula (10), the voltage expression that can be obtained on load resistance is as follows：
。
3. new single-shot, which is penetrated, receives the equivalent circuit of rear end cascade connection type system to four by AC-AC modules (1) and AC-DC module (2)
Constitute.The AC-AC modules (1) are by power module (10), transmitting coil Tx (11), receiving coil Rx_1 (12), receiving coil
Rx_2 (13), receiving coil Rx_3 (14), receiving coil Rx_4 (15) compositions；The AC-DC module (2) by rectifier bridge (21),
Rectifier bridge (22), rectifier bridge (23), rectifier bridge (24), load (25) are constituted.It is characterized in that：Power module (10) is through electric capacity C1
It is connected with transmitting coil (11), electric energy is transferred to receiving coil Rx_1 (12) through magnetic coupling, receives line by transmitting coil (11)
Enclose Rx_2 (13), receiving coil Rx_3 (14), receiving coil Rx_4 (15).Receiving coil Rx_1 (12) is through electric capacity C2With rectifier bridge
(21) it is connected；Receiving coil Rx_2 (13) is through electric capacity C3It is connected with rectifier bridge (22)；Receiving coil Rx_3 (14) is through electric capacity C4With it is whole
Bridge (23) is flowed to be connected；Receiving coil Rx_4 (15) is through electric capacity C5It is connected with rectifier bridge (24).Rectifier bridge (21), rectifier bridge (22),
Rectifier bridge (23), rectifier bridge (24) are sequentially connected in series to be connected with load (25).
4. new single-shot, which is penetrated to four transmitting coils for receiving rear end cascade connection type system, to be made up of circular or square multiturn coil, newly
It is also to be made up of circular or square multiturn coil that type single-shot, which is penetrated to four receiving coils for receiving rear end cascade connection type system,.
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Cited By (3)
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| CN110729820A (en) * | 2019-07-15 | 2020-01-24 | 国网江西省电力有限公司电力科学研究院 | Unmanned aerial vehicle and its portable wireless receiving unit, anti-offset coupling coil for wireless charging |
| CN111030316A (en) * | 2019-12-25 | 2020-04-17 | 国网福建省电力有限公司龙岩供电公司 | A Method for Modeling, Analysis and System Principle Analysis of Multi-relay MC-WPT System Efficiency |
| CN114365383A (en) * | 2019-11-15 | 2022-04-15 | Oppo广东移动通信有限公司 | Wireless receiving device, wireless charging system and wireless charging method |
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