CN205583803U - Electric vehicle wireless charging system - Google Patents
Electric vehicle wireless charging system Download PDFInfo
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- CN205583803U CN205583803U CN201620383180.0U CN201620383180U CN205583803U CN 205583803 U CN205583803 U CN 205583803U CN 201620383180 U CN201620383180 U CN 201620383180U CN 205583803 U CN205583803 U CN 205583803U
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Abstract
The utility model discloses an electric vehicle wireless charging system, wireless charging system includes DC power supply, contravariant board, loosely coupled transformer, rectifying and wave -filtering unit, dSPACE controller, the dSPACE controller is connected between contravariant board and rectifying and wave -filtering unit, and it obtains the current signal of load end to sample through the DS2003 module, obtains duty cycle and frequency signal through the logical operation module again to input the DS5101 module with it, make it to export two way PWM control signal. DSPACE controller frequency sweep fast makes wireless charging system reach resonant condition for transmission system's power factor and transfer characteristic reach the best, and can control the duty cycle of adjusting the high frequency square wave voltage source through PWM, realize wireless charging system's constant current output.
Description
Technical field
This utility model relate to a kind of charging system, and particularly to a kind of wireless charging system for electric automobile and wireless charging
Control method, belongs to wireless charging field.
Background technology
The mode of charging electric vehicle has the charging of charging pile formula contact and the contactless charging of wireless type.Present stage, the most frequently used
Or the charging of charging pile formula contact.But contactless charging has easy to operate, safety, simply, contactless abrasion, nothing
The advantages such as direct electrical connection.Additionally, the Based Intelligent Control of wireless charging, it is not necessary to manual operation, human users can be prevented effectively from.
Relative, the inferior position of contact charging is clearly.Therefore, wireless charging is significant, also for following development
It it is a focus the most competitive.
At present, the control method aspect of electric automobile wireless charging, relatively conventional has VFC, phase shifting control etc., these
The control method of wireless charging has respective limitation: phase shifting control requires that resonance circuit is in quasi-resonance state, off resonance state
Lower voltage there will be harmonic wave, produces distortion, affects system transfers；And VFC there will be out-of-control phenomenon.Therefore, this practicality
Novel propose a kind of new approaches, it is possible to effectively solve the problems referred to above.
Summary of the invention
The purpose of this utility model is to provide a kind of high-output power factor, exports the wireless charging system of stabling current simultaneously,.
For realizing object defined above, this utility model adopts the following technical scheme that a kind of wireless charging system for electric automobile, and it includes
DC source, inversion plate, loosely coupled transformer, rectification filtering unit, dSPACE controller, described DC source connects inversion
Plate provides DC input voitage, and described inversion plate triggers through two-way pwm signal and produces high frequency square wave voltage, connects loose coupling transformation
Device provides ac supply signal, and the electric current rectifying and wave-filtering of loosely coupled transformer outfan is obtained unidirectional current by described rectification filtering unit
Stream signal is for charging batteries of electric automobile, and described wireless charging system also includes dSPACE controller, and described dSPACE controls
The input of device is connected to the outfan of rectification filtering unit, and outfan is connected to the pwm signal input of inversion plate, described
DSPACE controller includes DS2003 module, logical operation module and DS5101 module, and DS2003 module is controlled as dSPACE
The input of device processed is connected to logical operation module, and logical operation module is connected with DS5101 module, and DS5101 module is dSPACE
The outfan of controller.
Further, described dSPACE controller obtains the current signal of load end by DS2003 module samples, then through patrolling
Collect computing module and obtain dutycycle and frequency signal, and be entered into DS5101 module, be allowed to export two-way pwm control signal.
Described dSPACE controller can rapid frequency-sweeping, trace into output frequency values corresponding to current peak, make wireless charging system reach
To resonant condition so that the power factor of total system and transmission characteristic reach optimal, and can control to regulate by PWM
The dutycycle in high frequency square wave voltage source, it is achieved the constant current output of wireless charging system.
Further, the logical operation module of described dSPACE controller includes frequency-tracking unit and duty cycle adjustment unit.
Further, described loosely coupled transformer includes magnetic core, transmitting coil, receiving coil, described transmitting coil and reception
Coil is rotating around on two pieces of magnetic cores, and described two pieces of magnetic cores are put relatively.Described magnetic core uses " W " type structure, can be the most right
The magnetic line of force is oriented, and improves efficiency of transmission.Described transmitting coil and receiving coil all use litz wire, can weaken collection skin effect
Tolerance electric current and should be increased.Described transmitting coil and receiving coil also use the mode of coiling from outside to inside, in order to improve loose coupling
The coefficient of coup of transformator.
This utility model compared with prior art provides the benefit that:
1) coefficient of coup of wireless charging system for electric automobile loosely coupled transformer is improved；
2) idle component of the frequency tracking loop of the control method of wireless charging system for electric automobile energy-conservation reduction transmission side, improves and passes
Defeated characteristic, output high power factor；
3) the duty cycle adjustment link of the control method of wireless charging system for electric automobile can realize the constant current output of wireless charging；
4) the control method control stability of wireless charging system for electric automobile is good, can be prevented effectively from off resonance phenomenon.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this utility model wireless charging system；
Fig. 2 is the schematic diagram of this utility model loosely coupled transformer, and wherein (a) is front view, and (b) is top view, institute in figure
Show that the unit of size is mm；
Fig. 3 is the process schematic of the control method of this utility model wireless charging；
Fig. 4 is the process schematic of this utility model frequency-tracking unit；
Fig. 5 is the process schematic of this utility model duty cycle adjustment unit；
Fig. 6 is the simulation result of control method one embodiment of this utility model wireless charging.
Detailed description of the invention
Below in conjunction with Figure of description, this utility model is described in detail.
Fig. 1 is the schematic diagram of this utility model wireless charging system.As it is shown in figure 1, wireless charging device include DC source 1,
Inversion plate 2, loosely coupled transformer 3, rectification filtering unit 4, dSPACE controller 5.
DC source 1 connects inversion plate 2 provides DC input voitage, and inversion plate 2 triggers through two-way pwm signal and produces high frequency friendship
Time variant voltage, is transferred to loosely coupled transformer 3, it is provided that high frequency ac signal, through the outfan electricity that loosely coupled transformer transmission obtains
Stream signal arranges filtering by rectification filtering unit 4 and obtains DC current signal, and this DC current signal acts on load, for electricity
Electrical automobile battery 6 charges.Meanwhile, DC current signal is input in dSPACE controller 5, regulation wireless charging frequency and
The dutycycle of high frequency square wave voltage.
DSPACE controller 5 also includes DS2003 module 51, logical operation module 52, DS5101 module 53.DSPACE is controlled
Device 5 processed obtains the current signal of load end by DS2003 module 51 sampling, then obtains dutycycle through logical operation module 52
And frequency signal, and it is entered into DS5101 module 53, it is allowed to export two-way pwm control signal.DSPACE controller 5
Wireless charging system can be made to reach resonant condition by rapid frequency-sweeping so that the power factor of total system and transmission characteristic reach optimal,
And can control to regulate the dutycycle in high frequency square wave voltage source by PWM, it is achieved the constant current output of wireless charging system.
Further, described logical operation module 52 includes frequency-tracking unit and the duty cycle adjustment unit carried out successively.
Further, as in figure 2 it is shown, described loosely coupled transformer 3 includes two pieces of magnetic cores 31, transmitting coil 32, reception
Coil 33.
Further, " W " type that is shaped as of described magnetic core 31, two pieces of magnetic cores are put, distance 100mm on spatial altitude relatively.
Transmitting coil 32 and receiving coil 33 all use 0.1mm*600 stock litz wire, and ecto-entad coiling forms.
This utility model additionally provides the control method of a kind of wireless charging system for electric automobile, the control of described wireless charging system
Method includes frequency-tracking link and duty cycle adjustment link, realizes respectively finding resonant frequency and constant current output.Frequency tracking loop
Joint and duty cycle adjustment link are carried out successively.As it is shown on figure 3, first step is frequency-tracking link, second step is for accounting for
Sky compares governing loop.
The most as shown in Figure 4, described frequency-tracking link includes:
First step, sets high charge frequency, and initializing maximum current value is 0, and operating frequency is maximum；
Second step, logical operation module read DS2003 module samples load current signal, by gained load current signal with
Maximum current value compares；
Third step, when load current signal value is more than maximum current value, this value covers maximum current value, simultaneously will charging frequency
Rate value is turned down and returns to second step；
4th step, when load current signal value is less than maximum current value, heightens charge frequency value, the charging frequency after heightening
Rate value keeps constant and enters the 5th step,
5th step, the wireless charging frequency that output is fixing.
Further, described duty cycle adjustment link includes:
First step, sets constant current output current value and range of error, initializes dutycycle；
Second step, logical operation module read DS2003 module samples load current signal, by gained load current signal with
Former setting constant current output current value compares；
Third step, when load current signal value is more than the maximum of constant current output current settings scope, turns down dutycycle,
When load current signal value is less than the minima of constant current output current settings scope, dutycycle is heightened, works as load current signal
When value is in the range of given current value allowable error, keep dutycycle constant.
4th step, circulation second step and third step.
This utility model embodiment has carried out simulating, verifying to the control method of described a kind of wireless charging system for electric automobile.Should
The analogue system that embodiment is built is as described below:
DC source is 20V, and inversion plate uses MOSFET full-bridge inverting, and the resonant capacitance of transmitting terminal and receiving terminal all uses 55nF,
Self-induction of loop is 59 μ H, and internal resistance is 0.5 Ω, and mutual inductance is 5 μ H.Rectification filtering unit uses uncontrollable rectifier, and LC filters,
Filter inductance is 1mH, and filter capacitor is 1mF, and load is set to 40 Ω equivalent resistances and replaces batteries of electric automobile.
In this embodiment, the control method of described a kind of wireless charging system for electric automobile is particularly as follows: the highest frequency that sets
For 90kHZ, initial duty cycle is 0.35, sets constant current output current value as 1A, and range of error is 3%.
The simulation result obtained be resonant frequency be 86kHZ, dutycycle is 0.37, the load current waveform of output as shown in Figure 6,
Gained load current is finally steady state value 1.01A, in range of error.
The above, preferred embodiment the most of the present utility model, it is not intended to limit protection domain of the present utility model.Obviously,
Those skilled in the art can carry out various change and modification without deviating from spirit and scope of the present utility model to this utility model.
So, if these amendments of the present utility model and modification belong within the scope of this utility model claim and equivalent technologies,
Then this utility model is also intended to comprise these change and modification.
Claims (5)
1. a wireless charging system for electric automobile, it is characterised in that include DC source, inversion plate, loosely coupled transformer, rectification filter
Ripple unit, dSPACE controller, described DC source connects inversion plate provides DC input voitage, and described inversion plate is through two-way PWM
Signal triggers and produces high frequency square wave voltage, and connecting loosely coupled transformer provides ac supply signal, and described rectification filtering unit is by pine
The electric current rectifying and wave-filtering of coupling transformer outfan obtains DC current signal for charging batteries of electric automobile, described wireless charging
System also includes dSPACE controller, and the input of described dSPACE controller is connected to the outfan of rectification filtering unit, defeated
Going out end and be connected to the pwm signal input of inversion plate, described dSPACE controller includes DS2003 module, logical operations mould
Block and DS5101 module, DS2003 module is connected to logical operation module, logical operations as the input of dSPACE controller
Module is connected with DS5101 module, and DS5101 module is the outfan of dSPACE controller.
Wireless charging system the most according to claim 1, it is characterised in that: the logical operation module bag of described dSPACE controller
Include frequency-tracking unit and duty cycle adjustment unit.
Wireless charging system the most according to claim 1, it is characterised in that: described loosely coupled transformer includes magnetic core, transmitting
Coil, receiving coil, described transmitting coil and receiving coil are rotating around on two pieces of magnetic cores, and described two pieces of magnetic cores are put relatively.
Wireless charging system the most according to claim 3, it is characterised in that: described magnetic core uses " W " type structure.
Wireless charging system the most according to claim 3, it is characterised in that: described transmitting coil and receiving coil all use Ritz
Line, and use the mode of coiling from outside to inside, in order to improve the coefficient of coup of loosely coupled transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383180.0U CN205583803U (en) | 2016-04-29 | 2016-04-29 | Electric vehicle wireless charging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383180.0U CN205583803U (en) | 2016-04-29 | 2016-04-29 | Electric vehicle wireless charging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826996A (en) * | 2016-04-29 | 2016-08-03 | 浙江大学 | Electric automobile wireless charging system and method for controlling wireless charging |
| CN110611511A (en) * | 2018-06-15 | 2019-12-24 | 中惠创智（深圳）无线供电技术有限公司 | Transmitter, receiver and wireless charging system |
-
2016
- 2016-04-29 CN CN201620383180.0U patent/CN205583803U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826996A (en) * | 2016-04-29 | 2016-08-03 | 浙江大学 | Electric automobile wireless charging system and method for controlling wireless charging |
| CN105826996B (en) * | 2016-04-29 | 2018-02-16 | 浙江大学 | A kind of control method of wireless charging system for electric automobile and wireless charging |
| CN110611511A (en) * | 2018-06-15 | 2019-12-24 | 中惠创智（深圳）无线供电技术有限公司 | Transmitter, receiver and wireless charging system |
| CN110611511B (en) * | 2018-06-15 | 2024-04-19 | 珠海市瀚向科技有限公司 | Transmitter, receiver and wireless charging system |
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