CN205693449U - A kind of wireless charging expanded electrical pad with multi load isolation characteristic - Google Patents
A kind of wireless charging expanded electrical pad with multi load isolation characteristic Download PDFInfo
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- CN205693449U CN205693449U CN201620532971.5U CN201620532971U CN205693449U CN 205693449 U CN205693449 U CN 205693449U CN 201620532971 U CN201620532971 U CN 201620532971U CN 205693449 U CN205693449 U CN 205693449U
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- pad
- load
- receiving coil
- charging
- changer
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Abstract
A kind of wireless charging expanded electrical pad with multi load isolation characteristic, launches pad, wireless energy receptor including inversion alternating current power supply, K changer, plane；K changer is made up of T-shaped or π type lc circuit network；It is in series by planar transmission line circle and transmitting coil tuning capacity that plane launches pad, and is adhered fixed on the cushion of insulant；Wireless energy receptor is made up of receiving coil and receiving coil tuning capacity and load in series, is placed on transmitting pad；Inversion alternating current source is launched pad by K changer and plane and is connected by conductor in parallel, receiving coil and receiving coil tuning capacity, and is connected with load circuit by output port.This utility model is easily implemented, and effect is notable.The wireless energy receptor of load to be charged can be arbitrarily placed in charged area not to be affected by other charging loads；Improve charging area utilization simultaneously, and extend and do not affect load isolation effect after splicing.
Description
Technical field
This utility model belongs to wireless energy transfer system design field.
Background technology
Increasing along with electronic product, a convenient domestic charging platform is by urgent needs.As a kind of new
Technology, wireless power transmission technology can meet this demand very well.In these wireless power transmission technology, magnetic resonance couples
Formula wireless charging technology is had an optimistic view of widely due to advantages such as its Distance Transmission safe, middle and high efficiency.Therefore, this is utilized
Technology can make a household radio charging system well.
Traditional multi load wireless charging system is to utilize a big transmitting coil and multiple little receiving coil to constitute
's.In this system, receiving coil be highly susceptible to other receiving coil interference and cannot be stable work.At present
In existing achievement in research, majority is that the utilization method at the circuit of load termination one coupling is to reduce interference.But, for
One loads relatively large number of system, and this method seems cumbersome and the most impracticable.Meanwhile, expansible more existing
Radio energy transmission system in, owing to expansion structure is special, need large area to cover to ensure uniform charging or there is a need to
Specific expanding location and mode so that the extension of system very loaded down with trivial details.
In the multi load uniform charging platform with load isolation characteristic that patent No. CN104159A proposes, utilize spy
Different structure creates the uniform charging space of a 3D, and multiple loads can arbitrarily be put, and is independent of each other during charging；Meanwhile,
This platform can expand to accommodate more load in vertical direction.But, the charging area utilization of this platform structure is relatively low,
Efficiency of transmission reduces along with expansion, and is only suitable for being applied to specific occasion.
Document " Meyer P, Germano P, Markovic M, et al. Design of a contactless
energy transfer system for desktop peripherals[J]. Industry Applications IEEE
Transactions on, 2011,47 (4): 1643-1651 " can be used for multi load based on snail tetragon proposition one
The multi-layer array type primary magnetic energy launch network of power supply, this structure is expandable structure, but owing to monolayer array CMF is distributed
Uneven, so needing the mode covered by multilamellar large area to mutually compensate for can charging at an arbitrary position with proof load,
Inconvenience extremely in application.Meanwhile, document " Zhong W X, Liu X, Hui S Y R. A Novel Single-
Layer Winding Array and Receiver Coil Structure for Contactless Battery
Charging Systems With Free-Positioning and Localized Charging Features[J].
Industrial Electronics IEEE Transactions on, 2011,58 (9): 4136-4144 " propose one
The magnetic energy for emission net of the single-layer winding array of ribbon core, receiving terminal can arbitrarily put, and launch network also is able to extension, due to each
The core material of individual expanding element and position all require so that technological requirement is high and it is big to implement difficulty.Document " Diao Yinliang. produce
Primary coil structure design [D] in the wireless charging platform of raw uniform magnetic field. Beijing University of Post & Telecommunication, 2011 " based on vicarious
Wireless power transmission technology proposes a kind of primary coil structure that can produce uniform magnetic field, and is tested by emulation
Card, meanwhile, in order to primary coil is improved by the extension of structure.But, in three above document to multiple loads between
Disturb and do not discuss in detail with isolation, even do not discuss, be only in that system extension and load are put and can be ignored position.With
Time, three documents are all based on vicarious wireless power transmission technology so that charging distance is only a two dimensional surface, leaves i.e.
Can not charge, therefore cannot wider application.
At " Kim J, Son H C, Kim D H, et al. Impedance matching considering
cross coupling for wireless power transfer to multiple receivers[C]. Wireless
Power Transfer. 2013:226-229”、“Kim J, Kim D H, Park Y J. Analysis of
Capacitive Impedance Matching Networks for Simultaneous Wireless Power
Transfer to Multiple Devices[J]. IEEE Transactions on Industrial Electronics,
2015,62 (5): 2807-2813 " and " Ean K K, Chuan B T, Imura T, et al. Impedance
matching and power division algorithm considering cross coupling for wireless
Power transfer via magnetic resonance [J]. 2012:1-5 " etc. in document, majority utilizes load termination
The method of the circuit of one coupling reduces the cross interference between multi load.But, load in relatively large number of system at one,
This method seems cumbersome and the most impracticable.It is thus desirable to a kind of load isolation scheme easily, allow load end without
Distribution road.
Utility model content
The purpose of this utility model is for charging when there is the single load in single source or the multi load application of single source in prior art
Platform is the most expansible and the problem such as state interference each other receiving load more, propose a kind of novel have multi load every
Scalable radio charging pad from characteristic.
This utility model is parallel to multiple charging pads at same inverter two ends by K changer, can be at X-axis and Y
Direction of principal axis extends in the way of tiling and is spliced into bigger area so that receiving receiving coil area occupied is bigger and number is more
Load.By seamless splicing, the junction, corner of each charging pad can be fully utilized, and is effectively improved charging pad
Area utilization；After extension and splicing, many charging pads wireless charging structure remains in that multi load isolation characteristic.In multiple loads
When charging, the receiving coil of charging load can realize well isolating, and charging is independent of each other simultaneously.
This utility model is realized by techniques below.
This utility model includes that inversion alternating current power supply, K changer, plane launch pad, wireless energy receptor.
K changer described in the utility model is also called impedance transformer, is made up of T-shaped or π type lc circuit network.Its
In, the value of inductance and electric capacity isWith。f 0 It is the operating frequency of system,K
It it is the characteristic parameter of K changer.
It is in series by planar transmission line circle and transmitting coil tuning capacity that described plane launches pad, and is adhered fixed
On the cushion of insulant.Each plane launch pad midplane transmitting coil specification, around to etc. be consistent.Each plane is sent out
Penetrate pad and be parallel to alternating current source two ends by K changer.
Described wireless energy receptor is made up of receiving coil and receiving coil tuning capacity and load in series, places
Launching on pad.
Inversion alternating current source launches pad by conductor in parallel, receiving coil and receiving coil tuning by K changer and plane
Capacitances in series, and be connected with load circuit by output port.
Described planar transmission line circle can use square or circular uniform magnetic field planar coil.The most square is even
High-intensity magnetic field planar coil, it is simple to the splicing of charging pad, it can produce longitudinal uniform magnetic field in the area of coil place.Launch
Coil tuning electric capacity makes resonant frequency be transferred to system operating frequency for transmitting terminal circuit tuningf 0 。
The optional position on planar transmission line circle can be placed on after described receiving coil external load.Receiving coil is adjusted
Humorous electric capacity makes resonant frequency also be transferred to system operating frequency for receiving terminal circuit tuningf 0 。
Charging pad described in the utility model can extend in the way of tiling to X-axis and Y direction and be spliced into bigger
Area, and share an alternating current source.Each plane is launched pad and is connected to inversion alternating current source two ends by K changer, with
The load isolation effect of guarantee system.
Inversion alternating current source described in the utility model is to use DC-AC or AC-DC-AC circuit through a full-bridge or half
Bridge inverter converts.This inversion alternating current source internal resistance is the least, only has the least switching loss, can be considered as without internal resistance roughly
Alternating-current voltage source.
Disclosed in this utility model, wireless charging electrical pad is easily implemented, and effect is notable.This utility model utilizes special coiling
Square uniform magnetic field planar coil as planar transmission line circle to produce uniform magnetic field, and utilize K changer with realize load
Isolation, the wireless energy receptor of load the most to be charged can be arbitrarily placed in charged area not by other charging loads
Impact；Meanwhile, utilize same alternating current source, multiple wireless charging electrical pad can extend arbitrarily and be spliced into bigger area come with
Accommodating more load, for improving charging area utilization, the junction, corner of charging pad also can sufficiently use, and
Load isolation effect is not affected after extension and splicing.
Accompanying drawing explanation
Fig. 1 is extendible wireless multi load charging pad circuit system schematic diagram.
In figure,V S For inversion alternating current source, K is K changer,L TX1WithL TX2For planar transmission line circle inductance,C TX1WithC TX2For
Transmitting coil tuning capacity,L 1、L 2、L 3With L 4For receiving coil inductance,C 1、C 2、C 3With C 4For receiving coil tuning capacity,
RL1、RL2、RL3And RL4For the external load circuit simplified.
Fig. 2 is the circuit system schematic diagram of embodiment.
Fig. 3 is the K transformer configuration circuit theory diagrams of embodiment.
Fig. 4 is AC supply voltage peak valueV SFor 5V, load resistance RL1Being 10 Ω, other load open circuit is (i.e. only to list
Load RL1Charging), frequency (KHZ)-voltage amplitude (V) curve chart.Frequency is 83.35KHZ(operating frequency) time, V1For
3.847V。
Fig. 5 is AC supply voltage peak valueV SFor 5V, load resistance RL2Being 5 Ω, other load open circuit is (i.e. only to single negative
Carry RL2Charging), frequency (KHZ)-voltage amplitude (V) curve chart.Frequency is 83.35KHZ(operating frequency) time, V2For 3.744V.
Fig. 6 is AC supply voltage peak valueV SFor 5V, load resistance RL3Being 20 Ω, other load open circuit is (i.e. only to list
Load RL3Charging), frequency (KHZ)-voltage amplitude (V) curve chart.Frequency is 83.35KHZ(operating frequency) time, V3For
3.883V。
Fig. 7 is AC supply voltage peak valueV SFor 5V, load resistance RL1It is 10 Ω, load resistance RL2Being 5 Ω, other is born
Carry open circuit (i.e. only to RL1And RL2Charging), frequency (KHZ)-voltage amplitude (V) curve chart, two loads separate 2.5cm(and are equal to
The radius of receiving coil).Frequency is 83.35KHZ(operating frequency) time, V1For 3.825V, V2For 3.730V.
Fig. 8 is AC supply voltage peak valueV SFor 5V, load resistance RL2It is 5 Ω, load resistance RL3Being 20 Ω, other is born
Carry open circuit (i.e. only to RL2And RL3Charging), frequency (KHZ)-voltage amplitude (V) curve chart, two loads are close to.Frequency is
83.35KHZ(operating frequency) time, V2For 3.686V, V3For 3.822V.
Fig. 9 is AC supply voltage peak valueV SFor 5V, load resistance RL1It is 10 Ω, load resistance RL3It is 20 Ω, other
Load open circuit is (i.e. only to RL1And RL3Charging), frequency (KHZ)-voltage amplitude (V) curve chart, two loads separate 5cm(and are equal to
The diameter of receiving coil).Frequency is 83.35KHZ(operating frequency) time, V1For 3.847V, V3For 3.883V.
Figure 10 is AC supply voltage peak valueV SFor 5V, load resistance RL1It is 10 Ω, load resistance RL2It is 5 Ω, load
Resistance RL3Being 20 Ω, three loads are charged simultaneously, frequency (KHZ)-voltage amplitude (V) curve chart, RL1And RL2Separate 2.5cm, RL1
And RL3Separate 5cm, RL2And RL3Closely it is close to.Frequency is 83.35KHZ(operating frequency) time, V1For 3.825V, V2For 3.675V,
V3For 3.822V.
Detailed description of the invention
Illustrate with embodiment, this utility model to be further illustrated below with reference to accompanying drawing, but not as this utility model model
The restriction enclosed and apply.
As shown in Figure 2.This charging system is by the plane transmitting pad splicing of 4 planar transmission line circles with same size
Becoming, wherein, each planar transmission line circle is that enamel covered wire coiling 10 circle of line footpath 1mm forms, and the length of side of every circle is respectively
5.4cm, 12.9cm, 16.4cm, 18.9cm, 20.8cm, 22.3cm, 23.4cm, 24.2cm, 24.6cm, 24.9cm, plane is launched
Coil inductanceL TXIt is 119.2uH, transmitting coil tuning capacityC TXFor 30.7nF, it is tuned atf 0For 83.35KHZ's
On system operating frequency.In wireless energy receptor, the specification of receiving coil is identical, a diameter of 5cm, is the enamel-cover of 1mm with line footpath
Copper wire winding 40 circle forms, its inductanceLFor 55.2uH, receiving coil tuning capacityCFor 68.7nF.KHere unify value
5.23 Ω, the K changer in embodiment uses the T-shaped lc circuit network of Fig. 3, therefore L=9.98uH, C=365.1nF.
Fig. 4 to Fig. 9 gives AC supply voltage peak valueV SFor 5V, load 1 resistance RL1It is 10 Ω, loads 2 resistance RL2
It is 5 Ω, loads 3 resistance RL3It is 20 Ω, the simulation curve of frequency (KHZ) in varied situations-voltage amplitude (V).Fig. 4 is to figure
6 are respectively RL、 RL2And RL3Each during individualism, the voltage amplitude value on operation frequency.Such as: be about
Under 83.35KHZ frequency, the voltage amplitude V of load 11For 3.847V, the voltage amplitude V of load 22For 3.744V, the voltage of load 3
Amplitude V3For 3.883V, it is basically identical with estimated value.Fig. 7 is RL1And RL2It is separated by the 2.5cm(radius equal to receiving coil) with
Time charging situation, now, voltage amplitude V1For 3.825V, voltage amplitude V2For 3.730V, when charging alone with them compared with,
The most only have dropped 0.5% and 0.3%.Fig. 8 is RL2And RL3Closely by situation about charging, voltage amplitude V simultaneously2For 3.686V,
Voltage amplitude V3For 3.822V, when charging alone with them compared with, have dropped 1% and 1.5% respectively.Fig. 9 is RL1And RL3It is separated by
5cm(is equal to the diameter of receiving coil) situation about simultaneously charging, voltage amplitude V1For 3.847V, voltage amplitude V2For 3.744V, with
When they charge alone consistent.As can be seen here, when load tight adjacent time, situation about being close to such as Fig. 8, between load some do
Disturb, but impact is little.Meanwhile, as long as receiving coil has separates some intervals, such as the situation of Fig. 7, the interference between load is the least.
When being about the diameter of receiving coil separated by a distance, such as the situation of Fig. 9, load can be isolated completely.Figure 10 is RL1、RL2With
RL3Corresponding above several display cases charge simultaneously, V1For 3.825V, V2For 3.675V, V3For 3.822V, charge alone with them
Time compare, have dropped 0.5%, 1.3% and 1.5% respectively, result and add the 3rd in the case of any one in Fig. 7 to Fig. 9 and bear
Carry consistent.
Claims (5)
1. there is the wireless charging an expanded electrical pad for multi load isolation characteristic, it is characterized in that: include that inversion alternating current power supply, K become
Parallel operation, plane launch pad, wireless energy receptor；
Described K changer is made up of T-shaped or π type lc circuit network；Wherein, the value of inductance and electric capacity isWith,f 0 It is the operating frequency of system,KIt it is the characteristic parameter of K changer；
It is in series by planar transmission line circle and transmitting coil tuning capacity that described plane launches pad, and is adhered fixed absolutely
On the cushion of edge material；
Described wireless energy receptor is made up of receiving coil and receiving coil tuning capacity and load in series, is placed on and sends out
Penetrate on pad；
Inversion alternating current source launches pad by conductor in parallel, receiving coil and receiving coil tuning capacity by K changer and plane
Series connection, and be connected with load circuit by output port.
The wireless charging the expanded electrical pad with multi load isolation characteristic the most according to claim 1, is characterized in that: described
Planar transmission line circle uses square or circular uniform magnetic field planar coil.
The wireless charging the expanded electrical pad with multi load isolation characteristic the most according to claim 1, is characterized in that: described
Each plane launch pad midplane transmitting coil specification, around to etc. be consistent.
The wireless charging the expanded electrical pad with multi load isolation characteristic the most according to claim 1, is characterized in that: described
Charging pad can extend in the way of tiling to X-axis and Y direction and splice, and shares an alternating current source.
The wireless charging the expanded electrical pad with multi load isolation characteristic the most according to claim 1, is characterized in that: described
Inversion alternating current source is to use DC-AC or AC-DC-AC circuit to convert through a full-bridge or half-bridge inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620532971.5U CN205693449U (en) | 2016-06-06 | 2016-06-06 | A kind of wireless charging expanded electrical pad with multi load isolation characteristic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620532971.5U CN205693449U (en) | 2016-06-06 | 2016-06-06 | A kind of wireless charging expanded electrical pad with multi load isolation characteristic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958666A (en) * | 2016-06-06 | 2016-09-21 | 南昌大学 | Expandable wireless charging pad with multi-load isolation characteristics |
| CN109149684A (en) * | 2018-07-31 | 2019-01-04 | 华为技术有限公司 | A kind of wireless charging device |
| CN114006478A (en) * | 2021-11-17 | 2022-02-01 | 重庆前卫无线电能传输研究院有限公司 | Electronic mall exhibition and sales table based on wireless power supply and circuit parameter design method thereof |
-
2016
- 2016-06-06 CN CN201620532971.5U patent/CN205693449U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958666A (en) * | 2016-06-06 | 2016-09-21 | 南昌大学 | Expandable wireless charging pad with multi-load isolation characteristics |
| CN105958666B (en) * | 2016-06-06 | 2019-10-01 | 南昌大学 | It is a kind of to expand wireless charging electrical pad with multi-load isolation characteristic |
| CN109149684A (en) * | 2018-07-31 | 2019-01-04 | 华为技术有限公司 | A kind of wireless charging device |
| WO2020024626A1 (en) * | 2018-07-31 | 2020-02-06 | 华为技术有限公司 | Wireless charging device |
| EP3780321A4 (en) * | 2018-07-31 | 2021-06-09 | Huawei Technologies Co., Ltd. | Wireless charging device |
| CN109149684B (en) * | 2018-07-31 | 2021-11-19 | 华为技术有限公司 | Wireless charging equipment |
| CN114123387A (en) * | 2018-07-31 | 2022-03-01 | 华为技术有限公司 | Wireless charging equipment |
| US11870274B2 (en) | 2018-07-31 | 2024-01-09 | Huawei Technologies Co., Ltd. | Wireless charging device |
| CN114006478A (en) * | 2021-11-17 | 2022-02-01 | 重庆前卫无线电能传输研究院有限公司 | Electronic mall exhibition and sales table based on wireless power supply and circuit parameter design method thereof |
| CN114006478B (en) * | 2021-11-17 | 2024-01-30 | 重庆前卫无线电能传输研究院有限公司 | Electronic mall exhibition stand based on wireless power supply and circuit parameter design method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161116 Termination date: 20200606 |
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| CF01 | Termination of patent right due to non-payment of annual fee |