CN205430180U - Magnetic coupling resonant mode wireless power transmission E class power amplifier - Google Patents
Magnetic coupling resonant mode wireless power transmission E class power amplifier Download PDFInfo
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- CN205430180U CN205430180U CN201520948342.6U CN201520948342U CN205430180U CN 205430180 U CN205430180 U CN 205430180U CN 201520948342 U CN201520948342 U CN 201520948342U CN 205430180 U CN205430180 U CN 205430180U
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Abstract
The utility model mainly discloses a magnetic coupling resonant mode wireless power transmission E class power amplifier, its constitution includes: incoming signal 1, input matching circuit 2, 3, the one power filter circuit 4 of gate pole bias supply, power tube 5, feedback circuit 6, drain electrode power supply 7, the 2nd power filter circuit 8, LC oscillation circuit 9, output matching circuit 10, output signal 11, its characterized in that: incoming signal 1 is through input matching circuit 2, and gate pole bias supply 3 provides a quiescent operation point for power tube 5 through power filter circuit 4, provides the circuit route for incoming signal, and feedback circuit 6 will drain output signal and feed back to the gate pole and provide power through power filter circuit 8 for output circuit with adjustment output signal intensity, drain electrode power 7, and 5 outputs of power tube are through LC oscillation circuit 9 input matching circuit 010, output signal 11. The utility model discloses the topology is simple, efficient, the system frequency is convenient adjusts.
Description
Technical field
Owing to E power-like amplifier of the present invention is mainly used in the transmission of magnet coupled resonant type wireless electric energy, therefore relate generally to electronics and RF application.
Background technology
Magnet coupled resonant type wireless electric energy transmission technology is one of big technology of wireless power transmission three, is also one of focus of research of scholar outside Present Domestic.But the power of wireless power transmission is the most little at present, rest on hectowatt grade, real-life needs can not be met the most far away, and improve through-put power and relate generally to three below problem: impedance matching (3) the electric energy transmission stability problem of design (2) transmission system parameters of (1) high-power high-frequency power supply, i.e. resonant frequency robustness problem.
Wireless power transmission high frequency electric source mainly has two kinds of implementation methods at present, and one is to utilize power electronic devices to pass through full-bridge inverting or semi-bridge inversion realization；One is to utilize power amplifier to be amplified signal power realizing.The former can realize relatively high power, but owing to being limited by power electronic devices switching frequency, supply frequency typically will not be the highest, and typically within hundreds of KHz, and frequency regulation is not very convenient.The latter can realize relatively high power and frequency, utilizes its preceding signal generation circuit realiration frequency modulation also very convenient, but equipment cost is higher.
Power amplification formula high frequency electric source is made up of signal generating circuit and power amplification circuit, and signal generating circuit generates the signal of required frequency, and the signal that signal generating circuit exports is amplified to power demand through power amplifier by this signal.
Power amplifier carries out classification in different ways three kinds of modes: divides according to working band, is divided into wideband power amplifer and narrow band power amplifier；Divide by duty, linear power amplifier and nonlinear power amplifier can be divided into；If divided by amplifier biasing and conducting situation, A class, B class, AB class, C class, D class, E class, F class, S class etc. can be divided into.Wherein A class, B class, AB class, C class are typically divided into classical power amplifier；D class, E class, F class, S class are typically divided into switch-mode power amplifier.
A class power amplifier turned in the time of 100%, and B class power amplifier turned in the time of 50%, and AB class just like shown in its name, is the most just conducting in certain period of 50%-100%.The circuit structure of AB class power amplifier uses the push-pull configuration similar with B class, and transistor biasing is on threshold voltage, and bias voltage also determines the efficiency of power amplifier closer to A class or B class simultaneously.In actual application, the efficiency of AB class power amplifier is probably between 30% to 70%.Switch power amplifier mainly includes D class, E class, F class and S class, one main thought of Switch power amplifier is to switch not consume any power, or the electric current of switch is zero, or the voltage of switch ends is zero, thus V, I product of switch is always zero, this means that transistor does not has any power consumption penalty, its efficiency theory can reach 100%.In real process, the efficiency of E power-like amplifier mainly to have both sides reason less than 100%.One aspect is owing to the conduction voltage drop of switching transistor is finite value, thus there is the power attenuation of conducting.Another aspect, owing to there is dead resistance, can produce loss.Actual efficiency can reduce, but is optimized by amendment load circuit parameter, and the actual efficiency of circuit is the highest.In frequency microwave frequency range, in order to reduce the insertion loss of circuit, output matching circuit also will use micro-tape substitute lumped parameter design, can reach good efficiency.
Owing to high frequency electric source belongs to the front end of emission of magnet coupled resonant type transmission system, total system efficiency of transmission to be improved must reduce the loss of every part, and E class power amplifier reduces switch transition loss and meets us to proposing high efficiency requirement.
Summary of the invention
The efficient E class power amplifier of present invention design belongs to nonlinear power amplifier according to whether for Linear Power Amplifier, uses single tube to amplify, meets ZVS and ZDS condition, reduces the loss of conversion between on off state greatly.Technical scheme is as follows:
null1. the magnet coupled resonant type wireless electric energy transmission E power-like amplifier that a kind is improved，Its composition includes: input signal 1，Input matching circuit 2，Gate pole bias supply 3，First electric source filter circuit 4，Power tube 5，Feedback circuit 6，Drain electrode power supply 7，Second source filter circuit 8，LC oscillating circuit 9，Output matching circuit 10，Output signal 11，Working method: input signal 1 is through input matching circuit 2，Gate pole bias supply 3 provides a quiescent point through electric source filter circuit 4 for power tube 5，Circuit pathways is provided to input signal，Drain electrode output signal is fed back to gate pole to adjust output signal strength by feedback circuit 6，Drain power 7 provides power through electric source filter circuit 8 for output loop，Power tube 5 exports through LC oscillating circuit 9 output matching circuit 10，Output signal 11.
2. input matching circuit 2 is made up of electric capacity C2 and inductance L1, and inductance L1 is series in circuit, electric capacity C2 earth.
3. the first electric source filter circuit 4 is made up of electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 earth.
4. feedback circuit 6 is connected between power tube Q drain electrode and gate pole by resistance R3 and electric capacity C8 and constitutes.
5. electric source filter circuit 8 is made up of electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 earth.
6.LC oscillating circuit 9 is composed in series by inductance L3 and electric capacity C14.
7. output matching circuit 10 is made up of electric capacity C15 and inductance L4, and inductance L4 is series in circuit, electric capacity C15 earth.The technical advantage of the present invention is as follows:
1) with strong points for radio energy transmission system frequency range.On market, most of existing power amplifiers are GHz communications band, seldom have the requirement meeting radio energy transmission system to bandwidth.
2) E class power amplifier topology is simple.It uses single tube to amplify, and compares full-bridge/half-bridge circuit drive part simpler easily controllable.
3) E class power amplification efficiency is high.Because switch state meets ZVS and ZDS condition, reduce loss when switching tube turns on and off greatly.
4) the convenient regulation of system frequency.Compare full-bridge/half-bridge inversion circuit, it is only necessary to the output signal frequency of regulation signal generating circuit.
Just having as above advantage due to E class power amplifier, the utilization rate being applied to can not only improve in magnet coupled resonant type wireless electric energy transmission system front end energy can also the most quickly regulate time and the manpower that system frequency saving is tested.
Accompanying drawing explanation
Fig. 1 power amplifier composition frame chart
Fig. 2 power amplifier schematic diagram
Fig. 3 .1 power amplifier ideal current waveform, Fig. 3 .2 power amplifier desired voltage waveform
Fig. 4 power amplifier feedback schematic diagram
In figure: 1 is input signal, 2 is input matching circuit, and 3 is gate pole bias supply, and 4 is the first electric source filter circuit, and 5 is power tube, and 6 is feedback circuit, and 7 is drain electrode power supply, and 8 is second source filter circuit, and 9 is LC oscillating circuit, and 10 is output matching circuit.11 is output signal.
Detailed description of the invention
1.E power-like amplifier
E power-like amplifier has multiple different topology structure, main difference is that in parallel or series capacitance or inductance, and the present invention uses the E power-like amplifier of shunt capacitance, and its circuit theory diagrams are as shown in Figure 2.
nullInput signal 1，Input matching circuit 2 (is made up of electric capacity C2 and inductance L1，Inductance L1 connects，Electric capacity C2 earth)，Gate pole bias supply 3 is Vb，Electric source filter circuit 4 is (by electric capacity C3、Electric capacity C4、Electric capacity C5、Electric capacity C6、Electric capacity C7 earth is constituted)，Power tube 5 is Q，Feedback circuit 6 (be connected between power tube Q drain electrode and gate pole by resistance R3 and electric capacity C8 and constitute)，Drain electrode power supply 7 is Vcc，Electric source filter circuit 8 is (by electric capacity C9、Electric capacity C10、Electric capacity C11、Electric capacity C12、Electric capacity C13 earth is constituted)，LC oscillating circuit 9 (inductance L3 and electric capacity C14 is composed in series)，Output matching circuit 10 (is made up of electric capacity C15 and inductance L4，Inductance L4 connects，Electric capacity C15 earth)，Output signal 11.
Main components: Freescale RF tube MRF6V2300, high frequency choke coil RFC, LC agitator, power filtering capacitor, match circuit capacitor and inductor, output capacitance, gate pole bias supply, drain electrode power supply, feedback circuit RC series connection, gate pole biasing and gate pole steady resistance.
E class power amplifier is in order to realize the output of maximal efficiency, and it must is fulfilled for following ZVS condition and ZDS condition:
ZVS (zero-voltageswitching): when switch becomes turning on (on) state from (off) state of shutoff, the voltage of colelctor electrode or drain electrode is equal to 0；ZDS (zero-derivativeswitching): when switch becomes turning on (on) state from (off) state of shutoff, the voltage derivative of colelctor electrode or drain electrode is equal to 0.Its desired voltage current waveform is as shown in Figure 3.
2. Match circuits
The characteristic curve of MRF6V2300NBR1 switching transistor was emulated before carrying out tandem circuit design, choose power attenuation according to its characteristic curve less and enable to the quiescent point that power tube is fully on.
The basic power amplifier designed is in order to export maximum power and the highest efficiency, it is necessary to obtain optimum load impedance and the source impedance of basic power amplifier.In order to obtain the two resistance value, the present invention uses load balance factor (LoadPull) and source traction (SourcePull) method.Load balance factor method is to wait output power curve by draw different loads resistance value in the case of given input power on Smith circle diagram, so that it is determined that optimum load impedance value.Source traction method is similar with load balance factor method.
In reality, the value of load and the value of source impedance be general and optimum load impedance value and source impedance value are not identical.This is accomplished by designing match circuit and load impedance and source impedance is mated with optimum impedance.The most first introduce load balance factor and source traction design, then introduce the design of match circuit.
Match circuits process is as follows:
(1) the most arbitrarily give source impedance, carry out load balance factor, choose optimum load impedance.
(2) optimum load impedance is set, carries out source traction, determine optimum source impedance.
(3) optimum source impedance in (2) is set, repeats (1) and determine optimum load impedance.
(4) constantly it is circulated and reaches stable optimum source impedance and load impedance.
(5) ADS software smith artwork is utilized respectively input and output matching circuit to be designed.(it should be noted that output matching circuit is directly inserted in output loop, and input matching circuit must be exchanged input/output terminal owing to software limits and just can be inserted in input circuit).
3. Feedback Design
For the transistor being operated in radio frequency band, stable it is critical that.Stability is also the most important condition that amplifier circuit must is fulfilled for.The most stable, guarantee circuit is no lack of the trend that vibration occurs.So that circuit stability COEFFICIENT K ＞ 1, the generally following measure of employing:
(1) it is directly grounded by electric capacity and small resistor at gate pole.
(2) at gate pole series resistor and electric capacity parallel circuit.
(3) resistance is added at gate pole and gate pole biasing
(4) feedback circuit is added
The present invention is to take (3) and (4) two kinds of measures, i.e. add feedback circuit, gate pole and gate pole bias add resistance its, wherein shown in the schematic diagram 4 of feedback circuit.
When certain factor causes transistor drain output signal to increase, the amount of negative feedback network feedback increases therewith, and this feedback quantity and original input signal do after the recovery, and original input signal reduces, thus causes the output reduction that drains.Therefore, negative feedback network is the loop of a Gain Automatic regulation, and the final result of regulation is that the change of drain electrode output is suppressed.But it is disadvantageously, this gain flattening technology is to reduce gain and efficiency as cost.Not only adding negative-feedback circuit is to exchange stability and gain flattening for for cost reducing gain and efficiency, and on gate pole with gate pole biasing, addition resistance is also such.
In order to enable the circuitry to stable work, there is better performance, it is provided that the DC source of high-quality is required.Design there may be ripple in view of power supply, prevent the self-excitation of circuit simultaneously, improve the efficiency of circuit, devise electric source filter circuit, mainly using electric capacity to complete, choosing of electric capacity value is relevant with circuit power frequency, and being typically chosen is all to use C=l/f.This value, respectively takes several value in this value simultaneously again.
When certain factor causes power tube drain electrode output signal Xo to increase, making to enter the most proportional increase of signal Xf of feedback circuit, owing to entering gate signal Xi=Xs-Xf, therefore Xi will reduce in the case of gate pole bias voltage is constant, again due to drain electrode output signal Xo=AXi, so Xo also will reduce.Therefore, negative feedback network is the loop of a Gain Automatic regulation, and the final result of regulation is that the change of drain electrode output is suppressed.But it is disadvantageously, this gain flattening technology is to reduce gain and efficiency as cost.Not only adding negative-feedback circuit is to exchange stability and gain flattening for for cost reducing gain and efficiency, and on gate pole with gate pole biasing, addition resistance is also such.
4. realize step:
1) choosing E power-like amplifier power tube, inquiry Datasheet finds that MRF6V2300NBR1 meets our requirement of experiment.
2) power tube chosen is carried out DC analysis, determine its quiescent point.
3) carrying out stability analysis to choosing power tube, the coefficient of stability is more than 1, i.e. thinks stable.
4) E class power amplifier is carried out the design of basic parameter.
5) input and output matching circuit is designed.
6) design of the electric source filter circuit of gate pole bias voltage and power tube drain electrode supply voltage.
7) whole circuit is carried out stability, the emulation of output performance (gain, power, efficiency etc.).
8) power amplifier is made.
The most immediate prior art
E power-like amplifier has multiple different topology structure, main difference is that in parallel or series capacitance or inductance, the present invention immediate E power-like amplifier is typically by constituting as follows: high frequency choke coil provides a constant direct current for drain electrode, series resonant tank thinks that quality factor are sufficiently large, can be for the sine-wave current of load output switch frequency, phase shift inductance provides a phase offset for load circuit output, parallel equivalent electric capacity, is made up of with external ground capacity switching tube drain-source the two poles of the earth output equivalent electric capacity.Under the effect of pumping signal, transistor is switch working state.When transistor saturation conduction, collector voltage waveform is determined by transistor；When the transistor is turned off, collector voltage waveform is determined by the transient response of laod network.
Claims (7)
- null1. a magnet coupled resonant type wireless electric energy transmission E power-like amplifier，Its composition includes: input signal (1)，Input matching circuit (2)，Gate pole bias supply (3)，First electric source filter circuit (4)，Power tube (5)，Feedback circuit (6)，Drain electrode power supply (7)，Second source filter circuit (8)，LC oscillating circuit (9)，Output matching circuit (10)，Output signal (11)，It is characterized in that: input signal (1) is through input matching circuit (2)，Gate pole bias supply (3) is that power tube (5) provides a quiescent point through electric source filter circuit (4)，Circuit pathways is provided to input signal，Drain electrode output signal is fed back to gate pole to adjust output signal strength by feedback circuit (6)，Drain power (7) provides power through electric source filter circuit (8) for output loop，Power tube (5) exports through LC oscillating circuit (9) output matching circuit (10)，Output signal (11).
- Magnet coupled resonant type wireless electric energy the most according to claim 1 transmission E power-like amplifier, it is characterised in that: described input matching circuit (2) is made up of electric capacity C2 and inductance L1, and inductance L1 is series in circuit, electric capacity C2 earth.
- Magnet coupled resonant type wireless electric energy the most according to claim 1 transmission E power-like amplifier, it is characterised in that: described electric source filter circuit (4) is made up of electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 earth.
- Magnet coupled resonant type wireless electric energy the most according to claim 1 transmission E power-like amplifier, it is characterised in that: described feedback circuit (6) is connected between power tube Q drain electrode and gate pole by resistance R3 and electric capacity C8 and constitutes.
- Magnet coupled resonant type wireless electric energy the most according to claim 1 transmission E power-like amplifier, it is characterised in that: described electric source filter circuit (8) is made up of electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 earth.
- Magnet coupled resonant type wireless electric energy the most according to claim 1 transmission E power-like amplifier, it is characterised in that: described LC oscillating circuit (9) is composed in series by inductance L3 and electric capacity C14.
- Magnet coupled resonant type wireless electric energy the most according to claim 1 transmission E power-like amplifier, it is characterised in that: described output matching circuit (10) is made up of electric capacity C15 and inductance L4, and inductance L4 is series in circuit, electric capacity C15 earth.
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| CN201520948342.6U CN205430180U (en) | 2015-11-20 | 2015-11-20 | Magnetic coupling resonant mode wireless power transmission E class power amplifier |
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| CN201520948342.6U CN205430180U (en) | 2015-11-20 | 2015-11-20 | Magnetic coupling resonant mode wireless power transmission E class power amplifier |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936392A (en) * | 2015-12-30 | 2017-07-07 | 南京理工大学 | A kind of improved magnet coupled resonant type wireless electric energy transmission E power-like amplifiers |
| CN107370468A (en) * | 2017-07-23 | 2017-11-21 | 成都斯普奥汀科技有限公司 | A kind of power amplifier source for magnetic resonance coupling wireless power transmission |
| CN107979348A (en) * | 2016-10-21 | 2018-05-01 | 南京理工大学 | A kind of list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers |
| CN107979347A (en) * | 2016-10-21 | 2018-05-01 | 南京理工大学 | A kind of width working band magnet coupled resonant type wireless electric energy transmission E power-like amplifiers |
| CN107979344A (en) * | 2016-10-21 | 2018-05-01 | 南京理工大学 | A kind of double reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers |
| CN108011601A (en) * | 2016-10-29 | 2018-05-08 | 南京理工大学 | A kind of E power-like amplifiers for the transmission of magnet coupled resonant type wireless electric energy |
| CN108933569A (en) * | 2017-05-24 | 2018-12-04 | 南京理工大学 | A kind of broadband magnet coupled resonant type wireless electric energy transmission E power-like amplifier |
| CN110729975A (en) * | 2019-10-11 | 2020-01-24 | 贵州省质安交通工程监控检测中心有限责任公司 | Magnetic coupling resonant wireless power transmission power amplification system |
| CN112148146A (en) * | 2020-09-08 | 2020-12-29 | 海信（山东）冰箱有限公司 | Signal detection circuit, method, control circuit and electrical equipment |
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2015
- 2015-11-20 CN CN201520948342.6U patent/CN205430180U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106936392A (en) * | 2015-12-30 | 2017-07-07 | 南京理工大学 | A kind of improved magnet coupled resonant type wireless electric energy transmission E power-like amplifiers |
| CN107979348A (en) * | 2016-10-21 | 2018-05-01 | 南京理工大学 | A kind of list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers |
| CN107979347A (en) * | 2016-10-21 | 2018-05-01 | 南京理工大学 | A kind of width working band magnet coupled resonant type wireless electric energy transmission E power-like amplifiers |
| CN107979344A (en) * | 2016-10-21 | 2018-05-01 | 南京理工大学 | A kind of double reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers |
| CN108011601A (en) * | 2016-10-29 | 2018-05-08 | 南京理工大学 | A kind of E power-like amplifiers for the transmission of magnet coupled resonant type wireless electric energy |
| CN108933569A (en) * | 2017-05-24 | 2018-12-04 | 南京理工大学 | A kind of broadband magnet coupled resonant type wireless electric energy transmission E power-like amplifier |
| CN107370468A (en) * | 2017-07-23 | 2017-11-21 | 成都斯普奥汀科技有限公司 | A kind of power amplifier source for magnetic resonance coupling wireless power transmission |
| CN107370468B (en) * | 2017-07-23 | 2020-09-29 | 成都斯普奥汀科技有限公司 | Power amplifier source for magnetic resonance coupling wireless power transmission |
| CN110729975A (en) * | 2019-10-11 | 2020-01-24 | 贵州省质安交通工程监控检测中心有限责任公司 | Magnetic coupling resonant wireless power transmission power amplification system |
| CN110729975B (en) * | 2019-10-11 | 2023-10-27 | 贵州省质安交通工程监控检测中心有限责任公司 | Magnetic coupling resonant wireless power transmission power amplifier system |
| CN112148146A (en) * | 2020-09-08 | 2020-12-29 | 海信（山东）冰箱有限公司 | Signal detection circuit, method, control circuit and electrical equipment |
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Granted publication date: 20160803 Termination date: 20161120 |