CN105846549A - Non-contact power transmission system and control method - Google Patents
Non-contact power transmission system and control method Download PDFInfo
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- CN105846549A CN105846549A CN201510015953.XA CN201510015953A CN105846549A CN 105846549 A CN105846549 A CN 105846549A CN 201510015953 A CN201510015953 A CN 201510015953A CN 105846549 A CN105846549 A CN 105846549A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a non-contact power transmission system and a control method. The system comprises a power transmitting end, a power receiving end, and a control unit. The control unit comprises a current controller and a switching signal generator. A feedback input end of the current controller receives a filtered DC side current detection signal of a high-frequency inverter, and a given input end of the current controller receives a signal of a voltage detection signal of an AC power supply after absolute value conversion and multiplication with a coefficient G. An output end of the current controller is connected with an input end of the switching signal generator, and an output end of the switching signal generator is connected with a power switching control end of a high-frequency inverter/high-frequency rectifier. The system can achieve a unit power factor of the AC power supply with no need of a PFC circuit, and reduces the complexity, size and cost.
Description
Technical field
The present invention relates to a kind of contactless power transmission system and control method.
Background technology
Contactless (or wireless) power transmission techniques makes not connected by wire and plug (socket) between sending end and receiving end
Connect, there is the series of advantages such as Electrical Safety, reliable, convenience, be particularly suitable for charging of mobile devices, charging electric vehicle (confession
Electricity) and the equipment of inflammable (quick-fried) and corrosive atmosphere occasion power.
Contactless power transmission system is made up of sending end system and receiving end system, wherein sending end typically by frequency rectifier,
The composition such as Large Copacity filter capacitor, high-frequency inverter, power transmission coil and compensating unit and corresponding control unit；Receiving end
Typically it is made up of, such as Fig. 1 hf rectifier, filter capacitor, electricity reception coil and compensating unit and corresponding control unit etc.
Shown in.Large value capacitor filtering is used so that power factor is relatively low after technique scheme sending end frequency rectifier.In order to
Improving sending end power factor, prior art typically increased one-level PFC (Power before sending end high-frequency inverter
Factor Correction, PFC) circuit, as shown in Figure 1a.But this complexity that can increase system and cost, reduce reliable
Property and power transmission efficiency.
Summary of the invention
The present invention is to solve the problems referred to above, it is proposed that a kind of contactless power transmission system and control method, native system without
PFC correcting circuit, has that circuit is simple and the advantage such as unity power factor.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of contactless power transmission system, including sending end, receiving end and control unit, wherein, sending end and receiving end
Carrying out electric energy transmission, control unit controls sending end and receiving end；
Communication power supply that described sending end includes being sequentially connected, low pass filter, frequency rectifier, high-frequency inverter, benefit
Repaying unit I and power transmission coil, described frequency rectifier DC side is directly connected with high-frequency inverter DC side, inactivity therebetween
Factor correcting circuit；
Described receiving end includes electricity reception coil, compensating unit II, hf rectifier and the load being sequentially connected；
Described control unit includes a current controller and switch signal generator, and the feedback input end of current controller receives warp
The DC side current detection signal of filtered high-frequency inverter, the given input of current controller receives described Alternating Current Power Supply electricity
The voltage detection signal in source through absolute value conversion and the signal after being multiplied by coefficient G, the output of described current controller connect described in open
The input of OFF signal generator, the output of described switch signal generator connects high-frequency inverter and hf rectifier power switch
Control end.
Described frequency rectifier and hf rectifier are passive rectifier, are the single-phase full bridge rectifier circuit of four diode compositions,
For unidirectional contactless power transmission system, i.e. power by described sending end to the Load transportation of described receiving end.
Described frequency rectifier and hf rectifier are active H bridge commutator, are the power switch pipe of four band anti-paralleled diodes
The H bridge translation circuit of composition, can be subject to electricity at described sending end with described for two-way contactless power transmission system, i.e. power
Transmitted in both directions between end.
Described frequency rectifier is provided with synchronous rectification control unit, and synchronous rectification control unit includes comparator and phase inverter, passes through
Comparator realizes the comparison to input ac voltage, and phase inverter realizes logical inversion；When input ac voltage is more than 0, described ratio
Relatively device output logical one, described phase inverter is output as logical zero.
Described high-frequency inverter is active H bridge inverter, is that the H bridging of the power switch pipe composition of four band anti-paralleled diodes changes
Circuit.
Described high-frequency inverter, for there being source semi-bridge inverter, is half bridging of the power switch pipe composition of two band anti-paralleled diodes
Change circuit.
A kind of control method based on said system, comprises the following steps:
(1) detect the DC side electric current of sending end high-frequency inverter, obtain current feedback signal after filtered process and deliver to control list
The feedback input end of elementary current controller；
(2) detection sending end communication power supply voltage, obtains given instruction current letter after absolute value converts and is multiplied by coefficient G
Number deliver to the given input of control unit current controller；
(3) current controller carries out process and outputs control signals to switching signal and send out given input signal and current feedback signal
The input of raw device, is then controlled high-frequency inverter and the power switch pipe of hf rectifier by switch signal generator, makes electric current
Feedback signal follows the tracks of given input signal.
In described step (2), coefficient G can be obtained by the closed loop control of described receiving end load voltage/current/power.
In described step (3), when power is transmitted to receiving end by described sending end, switch signal generator controls high-frequency inversion
The power switch pipe of device.
In described step (3), when power is transmitted to sending end by described receiving end, switch signal generator controls high-frequency rectification
The power switch pipe of device.
The invention have the benefit that
(1) a kind of contactless power transmission system and control method are provided, it is not necessary to pfc circuit can realize Alternating Current Power Supply electricity
The unity power factor in source, reduces the complexity of system, volume and cost；
(2) eliminate pfc circuit, make system decrease one-level high frequency conversion link, reduce switching loss, improve system
Conversion efficiency and reliability；
(3) can be used for the various contactless power transmission system powered by alternating current power supply, discharge charge as contactless in electric automobile
Electricity etc..
Accompanying drawing explanation
Fig. 1 is the existing contactless power transmission system without pfc circuit；
Fig. 1 a is the contactless power transmission system of existing band pfc circuit；
Fig. 2 is the contactless power transmission system of the present invention；
Fig. 3 is a kind of power frequency passive rectifier topological structure；
Fig. 3 a is a kind of power frequency H bridge active rectifier topological structure；
Fig. 4 is the synchronous rectification control unit of the power frequency H bridge active rectifier of Fig. 3 a；
Fig. 5 is a kind of high frequency passive rectifier topology structure；
Fig. 5 a is a kind of high frequency H bridge active rectifier topological structure；
Fig. 6 is a kind of high frequency H bridge inverter topological structure；
Fig. 6 a is a kind of high frequency half bridge inverter topology；
Wherein, 1, low pass filter, 2, frequency rectifier, 3, high-frequency inverter, 4, hf rectifier, 5, compensating unit
I, 6, compensating unit II, 7, power transmission coil, 8, electricity reception coil, 9, load, 10, communication power supply, 11, sending end,
12, receiving end, 13, control unit, 14, current controller, 15, switch signal generator, 16, filter circuit, 17,
Absolute value converter, 18, multiplier, 19, comparator, 20, phase inverter, 21, synchronous rectification control unit.
Detailed description of the invention:
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As in figure 2 it is shown, the contactless power transmission system figure of the present invention, it includes sending end 11, receiving end 12 and control unit
13, wherein sending end 11 includes communication power supply 10, low pass filter 1, frequency rectifier 2, high-frequency inverter 3, power transmission line
Circle 7 and compensating unit I 5；Receiving end includes hf rectifier 4, electricity reception coil 8 and compensating unit II 6, load 9 etc..It is characterized in that,
Described frequency rectifier 2 DC side is directly connected with high-frequency inverter DC side, reactive factor correcting circuit therebetween.Described
Control unit 13 at least includes a current controller 14 and switch signal generator 15, the DC side electric current of described high-frequency inverter 3
Detection signal idObtain after the filtering of filtered circuit 16Connect the feedback input end of described current controller 14, described Alternating Current Power Supply
Power supply 10 voltage detection signal usAfter absolute value converter 17 converts | us|, obtain given instruction current signal after being multiplied by coefficient GConnecting the given input of described current controller 14, the output F of described current controller 14 connects described switching signal and occurs
The input of device 15, the output K of switch signal generator 15 connects the power switch control of described high-frequency inverter 3/ hf rectifier 4
End processed.
Fig. 3 gives the power frequency passive rectifier circuit structure diagram of a kind of frequency rectifier 2, including four diode Z1～Z4, group
Become known single-phase full bridge rectifier circuit.
Fig. 3 a gives the power frequency active H bridge rectifier circuit structure chart of a kind of frequency rectifier 2, including four band inverse parallel two poles
Power switch pipe Q1～Q4 of pipe, the known H bridge translation circuit of composition.
The synchronous rectification control unit 21 of the power frequency active H bridge commutator 2 that Fig. 4 gives, realizes handing over input by comparator 19
The comparison of stream voltage, phase inverter 20 realizes logical inversion.As input ac voltage usDuring more than 0, described comparator 19 exports logic
" 1 ", described phase inverter 20 is output as logical zero, controls switching tube Q1 and the Q4 conducting of the active H bridge commutator shown in Fig. 3 a,
Q2 and Q3 ends, otherwise, as input ac voltage usDuring less than 0, described comparator 19 exports logical zero, described phase inverter 20
Being output as logical one, control switching tube Q2 and the Q3 conducting of the active H bridge commutator shown in Fig. 3 a, Q1 and Q4 ends.
Fig. 5 gives the high frequency passive rectifier circuit structure chart of a kind of hf rectifier 4, including four diode Z5～Z8, group
Become known single-phase full bridge rectifier circuit.
Fig. 5 a gives the high frequency active H bridge rectifier circuit structure chart of a kind of hf rectifier 4, including four band inverse parallel two poles
Power switch pipe Q5～Q8 of pipe, the known H bridge translation circuit of composition.
Fig. 6 gives the H bridge inverter circuit structure diagram of a kind of high-frequency inverter 3, including the power of four band anti-paralleled diodes
Switching tube S1～S4, the known H bridge translation circuit of composition.
Fig. 6 a gives the half-bridge inverter circuit structure diagram of a kind of high-frequency inverter 3, including the power of two band anti-paralleled diodes
Switching tube S1～S2, the known semi-bridge alternation circuit of composition.
Embodiment 1:
Frequency rectifier 2 in Fig. 2 is realized by Fig. 3, and high-frequency inverter 3 H bridge inverter as shown in Figure 6 realizes, hf rectifier
4 are realized by Fig. 5, just constitute a kind of unidirectional contactless power transmission system main circuit topology, and power can only carry out forward transmission,
I.e. power is transmitted to the load 9 of receiving end 12 by the communication power supply 10 of sending end 11 that (or in Fig. 2 power is by left side to the right
Transmission), the output K of described switch signal generator 15 connects the control of the power switch tube S 1～S4 of high-frequency inverter 3 described in Fig. 6
End.
Embodiment 2:
High-frequency inverter 3 in embodiment 1 is changed and is realized by the half-bridge inverter shown in Fig. 6 a, just constitute another kind of unidirectional noncontact
Formula power transmission system main circuit topology, the output K of described switch signal generator 15 connects the merit of high-frequency inverter 3 described in Fig. 6 a
The control end of rate switching tube S1～S2.
Embodiment 3:
Frequency rectifier 2 in Fig. 2 is realized by Fig. 3 a, and high-frequency inverter 3 H bridge inverter as shown in Figure 6 realizes, high-frequency rectification
Device 4 is realized by Fig. 5 a, just constitutes a kind of two-way contactless power transmission system main circuit topology, and power can carry out forward with reverse
Transmission.When carry out forward power transmission time, power by the communication power supply 10 of sending end 11 to the load 9 of receiving end 12 transmit (or
In person Fig. 2, power is transmitted to the right by left side), now, it is inverse that the output K of described switch signal generator 15 connects high frequency described in Fig. 6
Becoming the control end of the power switch tube S 1～S4 of device 3, frequency rectifier 2 and hf rectifier 4 are all operated in rectification state (i.e. power
Switching tube is in cut-off state), high-frequency inverter 3 is in high-frequency inversion state.When carrying out reverse power transmission, power is by being subject to
The load 9 of electricity end 12 is transmitted (or in Fig. 2, power is transmitted to the left by right side) to the communication power supply 10 of sending end 11, now,
The output K of described switch signal generator 15 connects the control end of power switch pipe Q5～Q8 of hf rectifier 4 described in Fig. 5, high
Frequently commutator 4 is operated in high-frequency inversion state, and frequency rectifier 2 is in synchronous rectification state, and its power switch pipe Q1～Q4 is by Fig. 4
Synchronous rectification control unit 21 control, high-frequency inverter 3 is in high-frequency rectification state, and (i.e. power switch tube S 1～S4 is in cut-off
State).
In above-described embodiment, the effect of described current controller 14 is finally the output electric current i controlling described communication power supply 10s
For with supply voltage usWith frequency, with/anti-phase, alternating current of similar shape or be and supply voltage usWith frequency, same/anti-phase sine
Electric current, makes described contactless power transmission system keep unity power factor.
In above-described embodiment, the coefficient G of control unit 13 can be adjusted by potentiometer, it is possible to is loaded 9 by described receiving end 11
The closed loop control of voltage/current/power obtains.
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines, but not limit to scope
System, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art need not pay
Go out various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (9)
1. a contactless power transmission system, including sending end, receiving end and control unit, wherein, sending end with by electricity
End carries out electric energy transmission, and control unit controls sending end and receiving end；
Communication power supply that described sending end includes being sequentially connected, low pass filter, frequency rectifier, high-frequency inverter, benefit
Repaying unit I and power transmission coil, described frequency rectifier DC side is directly connected with high-frequency inverter DC side, inactivity therebetween
Factor correcting circuit；
Described receiving end includes electricity reception coil, compensating unit II, hf rectifier and the load being sequentially connected；
It is characterized in that: described control unit includes a current controller and switch signal generator, and the feedback of current controller is defeated
Entering the DC side current detection signal of the high-frequency inverter after holding reception filtered, the given input of current controller receives described
The voltage detection signal of communication power supply signal after absolute value converts and is multiplied by coefficient G, the output of described current controller
Connecting the input of described switch signal generator, the output of described switch signal generator connects high-frequency inverter and high-frequency rectification
Device power switch controls end.
A kind of contactless power transmission system the most as claimed in claim 1, is characterized in that: described frequency rectifier and high frequency
Commutator is passive rectifier, is the single-phase full bridge rectifier circuit of four diode compositions, passes for unidirectional contactless power
Communication system, i.e. power by described sending end to the Load transportation of described receiving end.
A kind of contactless power transmission system the most as claimed in claim 1, is characterized in that: described frequency rectifier and high frequency
Commutator is active H bridge commutator, is the H bridge translation circuit of the power switch pipe composition of four band anti-paralleled diodes, for double
To contactless power transmission system, i.e. power can between described sending end and described receiving end transmitted in both directions.
A kind of contactless power transmission system the most as claimed in claim 1, is characterized in that: described frequency rectifier is provided with same
Step Commutation control unit, synchronous rectification control unit includes comparator and phase inverter, is realized input ac voltage by comparator
Comparison, phase inverter realizes logical inversion；When input ac voltage more than 0 time, described comparator output logical one, described instead
Phase device is output as logical zero.
A kind of contactless power transmission system the most as claimed in claim 1, is characterized in that: described high-frequency inverter is active
H bridge inverter, is the H bridge translation circuit of the power switch pipe composition of four band anti-paralleled diodes.
A kind of contactless power transmission system the most as claimed in claim 1, is characterized in that: described high-frequency inverter is active
Half-bridge inverter, is the semi-bridge alternation circuit of the power switch pipe composition of two band anti-paralleled diodes.
7. a control method based on the system as according to any one of claim 1-6, is characterized in that: comprise the following steps:
(1) detect the DC side electric current of sending end high-frequency inverter, obtain current feedback signal after filtered process and deliver to control list
The feedback input end of elementary current controller；
(2) detection sending end communication power supply voltage, obtains given instruction current letter after absolute value converts and is multiplied by coefficient G
Number deliver to the given input of control unit current controller；
(3) current controller carries out process and outputs control signals to switching signal and send out given input signal and current feedback signal
The input of raw device, is then controlled high-frequency inverter and the power switch pipe of hf rectifier by switch signal generator, makes electric current
Feedback signal follows the tracks of given input signal.
8. control method as claimed in claim 7, is characterized in that: in described step (2), and coefficient G can be by described receiving end
The closed loop control of load voltage/current/power obtains.
9. control method as claimed in claim 7, is characterized in that: in described step (3), when power by described sending end to
During receiving end transmission, switch signal generator controls the power switch pipe of high-frequency inverter；
In described step (3), when power is transmitted to sending end by described receiving end, switch signal generator controls high-frequency rectification
The power switch pipe of device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520021827.0U CN204316199U (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system |
| CN201510015953.XA CN105846549B (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510015953.XA CN105846549B (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system and control method |
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| CN105846549A true CN105846549A (en) | 2016-08-10 |
| CN105846549B CN105846549B (en) | 2018-09-21 |
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| CN201520021827.0U Expired - Fee Related CN204316199U (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system |
| CN201510015953.XA Active CN105846549B (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system and control method |
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| CN201520021827.0U Expired - Fee Related CN204316199U (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899091A (en) * | 2017-04-20 | 2017-06-27 | 武汉大学 | The remote control and method of a kind of wireless energy transfer system |
| WO2020237889A1 (en) * | 2019-05-28 | 2020-12-03 | 浙江大学 | Wireless power transmission system for implementing pfc by means of secondary side modulation |
| WO2022000827A1 (en) * | 2020-07-03 | 2022-01-06 | 浙江大学 | Method for implementing pfc using only primary phase shift control |
Families Citing this family (6)
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|---|---|---|---|---|
| CN204316199U (en) * | 2015-01-13 | 2015-05-06 | 山东大学 | A kind of contactless power transmission system |
| US10046660B2 (en) | 2015-06-19 | 2018-08-14 | Qualcomm Incorporated | Devices, systems, and methods using reactive power injection for active tuning electric vehicle charging systems |
| CN106059364B (en) * | 2016-08-11 | 2018-11-23 | 重庆大学 | A kind of sources of high frequency emissions for radio energy transmission system |
| CN109995240A (en) | 2018-01-02 | 2019-07-09 | 通用电气公司 | Power adapter and power conversion method |
| CN111416443A (en) * | 2019-01-07 | 2020-07-14 | 哈尔滨工业大学（威海） | Device capable of realizing wireless power transmission voltage stabilization output |
| CN114172166A (en) * | 2021-12-07 | 2022-03-11 | 阳光电源股份有限公司 | Voltage generating device and high-frequency generation control method thereof |
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| CN104079076A (en) * | 2013-03-29 | 2014-10-01 | 河南工程学院 | Non-contact power supply system using frequency conversion soft switching driving technology and driving method thereof |
| CN103986344A (en) * | 2014-05-30 | 2014-08-13 | 山东大学 | System and method for controlling unit power factor single-level AC-DC converter |
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| CN106899091A (en) * | 2017-04-20 | 2017-06-27 | 武汉大学 | The remote control and method of a kind of wireless energy transfer system |
| WO2020237889A1 (en) * | 2019-05-28 | 2020-12-03 | 浙江大学 | Wireless power transmission system for implementing pfc by means of secondary side modulation |
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| WO2022000827A1 (en) * | 2020-07-03 | 2022-01-06 | 浙江大学 | Method for implementing pfc using only primary phase shift control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105846549B (en) | 2018-09-21 |
| CN204316199U (en) | 2015-05-06 |
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