CN107979348A - A kind of list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers - Google Patents
A kind of list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers Download PDFInfo
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- CN107979348A CN107979348A CN201610919580.3A CN201610919580A CN107979348A CN 107979348 A CN107979348 A CN 107979348A CN 201610919580 A CN201610919580 A CN 201610919580A CN 107979348 A CN107979348 A CN 107979348A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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Abstract
The invention discloses a kind of single reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers, its course of work：Input signal（1）By input matching circuit（2）With input reactance compensation circuit（3）, gate pole bias supply（4）By electric source filter circuit（5）It is connected to power tube（6）Front end, feedback circuit（7）It is parallel to power tube（6）Both ends, drain power supply（8）By electric source filter circuit（9）It is connected to power tube（6）Rear end, power tube（6）Output reactance compensation circuit is passed through in output（10）Output matching circuit（11）With low pass ellipse filter circuit（12）, export signal（13）.Compared to traditional single-frequency point E class power amplifiers, preferable output power and efficiency can be kept in broad frequency band；System output frequency is convenient to be adjusted, and only needs Regulate signal that the output signal frequency of circuit occurs；Using low pass ellipse filter circuit, the filtering characteristic of broadband E class power amplifier laod networks is enhanced.
Description
Technical field
Since broadband type E power-like amplifiers of the present invention are mainly used in the transmission of magnet coupled resonant type wireless electric energy, thus it is main
It is related to electronics and RF application.
Background technology
Magnet coupled resonant type wireless electric energy transmission technology is one of three big technology of wireless power transmission, and current domestic and international
One of hot spot of research of scholar.But the power of wireless power transmission is also little at present, rests on hectowatt grade, far can not also
Meet real-life needs, and improve transimission power and relate generally to following three problems：(1) large-power broadband high-frequency electrical
Impedance matching (3) electric energy transmission stability problem of design (2) transmission system parameters in source, i.e. resonant frequency robustness problem.
Wireless power transmission high frequency electric source mainly has two kinds of implementation methods at present, and one kind is passed through using power electronic devices
Full-bridge inverting or semi-bridge inversion are realized；One kind is that signal power is amplified realization using power amplifier.The former can realize larger work(
Rate, but due to being limited by power electronic devices switching frequency, supply frequency is not generally high, and be not easy to adjust frequency.The latter
Can realize relatively high power and frequency, using its preceding signal occur circuit realize that frequency modulation is also very convenient, but equipment cost compared with
It is high.
Power amplification formula high frequency electric source is made of signal generating circuit and power amplification circuit, signal generating circuit generation institute
The signal of frequency is needed, which is amplified to required power by power amplifier by the signal that signal generating circuit exports.If
By amplifier biasing and conducting situation point, power amplifier can be divided into A classes, B classes, AB classes, C classes, D classes, E classes, F classes, S classes
Deng.A classes, B classes, AB classes, C classes are typically divided into the power amplifier of classics；D classes, E classes, F classes, S classes are typically divided into switching molding
Formula power amplifier.
Wherein, a main thought of Switch power amplifier is to switch not consuming any power, Huo Zhekai in the ideal case
The electric current of pass is zero, or the voltage of switch ends is zero, thus V, I product switched is always zero, it means that transistor
There is no any power consumption penalty, 100% can be reached on its efficiency theory.In real process, due to the conducting pressure of switching transistor
The influence of the factor such as drop and dead resistance, the efficiency of E power-like amplifiers will be less than 100%, but by changing load circuit
Parameter optimizes, and the actual efficiency of circuit is still very high.Since high frequency electric source belongs to magnet coupled resonant type Transmission system
Front end of emission, to improve total system efficiency of transmission must reduce the loss of each section, and broadband E classes power amplifier reduces switch and turns
Changing loss meets us to proposing efficient requirement.
The content of the invention
The broadband E class power amplifiers that the present invention designs belong to nonlinear power amplifier according to whether for Linear Power Amplifier, are put using single tube
Greatly, meet ZVS and ZDS conditions, greatly reduce the loss changed between on off state.
Technical problem solved by the invention is to provide a kind of single reactance compensation magnet coupled resonant type wireless electric energy transmission
Broadband E power-like amplifiers.
The technical solution for realizing the object of the invention is：
1. a kind of list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers, its composition bag
Include：Input signal (1), input matching circuit (2), input reactance compensation circuit (3), gate pole bias supply (4), power filter electricity
Road (5), power tube (6), feedback circuit (7), drain electrode power supply (8), electric source filter circuit (9), output reactance compensation circuit
(10), output matching circuit (11), low pass ellipse filter circuit (12), output signal (13), wherein：Input signal (1) is passed through
Input matching circuit (2) and input reactance compensation circuit (3), gate pole bias supply (4) are connected to work(by electric source filter circuit (5)
Rate pipe (6) front end, feedback circuit (7) are parallel to power tube (6) both ends, and drain electrode power supply (8) passes through electric source filter circuit (9)
Power tube (6) rear end is connected to, output reactance compensation circuit (10) output matching circuit (11) and low pass are passed through in power tube (6) output
Oval filter circuit (12), output signal (13).
2. input matching circuit (2) is made of C2, C3, C4 and L1, L2, L3, L1, L2, L3 are series in circuit, C2, C3,
C4 earths.
3. input reactance compensation circuit (3) is made of L4, L5 and C5, C6, L4 and C5 are series in circuit, and L5 is series at door
In the bias supply branch of pole, C6 simultaneously connects ground.
4. electric source filter circuit (5) is made of C7, C8, C9, C10, C11 earth.
5. feedback circuit (7) is connected between power tube Q drain electrodes and gate pole by R1 and C12 and formed.
6. electric source filter circuit (9) is made of C13, C14, C15, C16, C17 earth.
7. output reactance compensation circuit (10) is made of L6, L7 and C18, C19, L7 and C19 are series in circuit, L6 series connection
In branch is powered in drain electrode, C18 simultaneously connects ground.
8. output matching circuit (11) is made of C20, C21, C22 and L8, L9, L10, L8, L9, L10 are series in circuit,
C20, C21, C22 earth.
9. low pass ellipse filter circuit (12) is made of C23, C24, C25, C26, C27 and L11, L12, L13, L11 is in parallel
C26, L12 parallel connection C27, be series in circuit, C23, C24, C25 earth together with L13.
Compared with prior art, the present invention its remarkable advantage：
1) it is with strong points for radio energy transmission system frequency range.The most of existing power amplifiers of in the market are GHz communication frequencies
Section, few requirements for meeting radio energy transmission system to bandwidth.
2) E classes power amplification efficiency is high.Because switch state meets ZVS and ZDS conditions, greatly reduce switching tube open and
Loss during shut-off.
3) working band is wide.Compared to traditional single-frequency point E class power amplifiers, preferable output power can be kept in broad frequency band
With efficiency.
4) system frequency is convenient is adjusted.Compared to full-bridge/half-bridge inversion circuit, it is only necessary to which the output of circuit occurs for Regulate signal
Signal frequency.
5) low pass ellipse filter circuit is used, enhances the filtering characteristic of broadband E class power amplifier laod networks.Due to broadband E
The predominantly higher hamonic wave filtered out is needed in class power amplifier laod network, compared to oval bandwidth-limited circuit, low-pass filter circuit
Structure is more simple, reduces the loss of component.
Just since this kind of modified broadband E class power amplifier has the advantages that as above, to be applied to magnet coupled resonant type wireless electricity
The utilization rate of front end energy can not only be improved in energy Transmission system to solve system because of frequency point by adjusting frequency
The problem of splitting phenomenon and causing output power drastically to decline.
The present invention is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 power amplifier composition frame charts
Fig. 2 power amplifier schematic diagrams
Voltage current waveform is thought in Fig. 3 power amplifier management
Fig. 4 reactance compensation circuit diagram figures
Fig. 5 power amplifier feedback schematic diagrames
Broadband E power-like amplifiers of the Fig. 6 closest to the prior art
In figure：1 is input signal, and 2 be input matching circuit, and 3 be input reactance compensation circuit, and 4 be gate pole bias supply,
5 be electric source filter circuit, and 6 be power tube, and 7 be feedback circuit, and 8 be drain electrode power supply, and 9 be electric source filter circuit, and 10 be defeated
Go out reactance compensation circuit, 11 be output matching circuit, and 12 be low pass ellipse filter circuit, and 13 be output signal.
Embodiment
1. broadband E power-like amplifiers
Broadband E power-like amplifiers have a variety of different topology structures, main difference is that reactance compensation circuit is with matching electricity
The type on road, the present invention is using the broadband E classes using single reactance compensation technique and Chebyshev's low pass impedance translation circuit
Power amplifier, its circuit diagram are as shown in Figure 2.
Input signal 1, input matching circuit 2 (are made of, L1, L2, L3 are series at circuit C2, C3, C4 and L1, L2, L3
In, C2, C3, C4 earth), input reactance compensation circuit 3 (it is made of L4, L5 and C5, C6, L4 and C5 are series in circuit,
L5 is series in gate pole bias supply branch, and C6 simultaneously connects ground), gate pole bias supply 4 is Vb, electric source filter circuit 5 (by C7,
C8, C9, C10, C11 earth are formed), power tube 6 be Q, feedback circuit 7 (by R1 and C12 be connected on power tube Q drain electrodes with
Formed between gate pole), drain electrode power supply 8 is Vcc, and electric source filter circuit 9 is (by C13, C14, C15, C16, C17 earth structure
Into), output reactance compensation circuit 10 (is made of, L7 and C19 are series in circuit, and L6 is series at drain electrode L6, L7 and C18, C19
Power in branch, C18 simultaneously connects ground), output matching circuit 11 (is made of, L8, L9, L10 C20, C21, C22 and L8, L9, L10
Be series in circuit, C20, C21, C22 earth), low pass ellipse filter circuit 12 (by C23, C24, C25, C26, C27 and
L11, L12, L13 are formed, and L11 parallel connection C26, L12 parallel connections C27, be series in circuit together with L13, and C23, C24, C25 simultaneously couple
Ground), export signal 13.
Main components：Freescale RF tube MRF6V2150NBR1, reactance compensation circuit capacitance inductance, power filter
It is capacitance, match circuit capacitor and inductor, capacitance, gate pole bias supply, drain electrode power supply, feedback circuit capacitance resistance, low
Bandpass filter inductance capacitance.
Broadband E classes power amplifier in order to realize the output of maximal efficiency, its must meet on a wide frequency band following ZVS conditions and
ZDS conditions：
ZVS(zero-voltage switching)：When switch is changed into turning on (on) state from shut-off (off) state,
Collector or the voltage of drain electrode are equal to 0；ZDS(zero-derivative switching)：When switch from shut-off (off) shape
When state is changed into turning on (on) state, the voltage derivative of collector or drain electrode is equal to 0.Its desired voltage current waveform such as Fig. 3 institutes
Show.
2. reactance compensation circuit and Match circuits
The characteristic curve of MRF6V2150NBR1 switching transistors is emulated before tandem circuit design is carried out,
It is smaller and enable to the fully on quiescent point of power tube that power attenuation is chosen according to its characteristic curve.
The basic power amplifier designed in order to export maximum power and highest efficiency, it is necessary to obtain basic training
The optimum load impedance and source impedance on electric discharge road.In order to obtain the two impedance values, the present invention uses load balance factor
(LoadPull) and (Source Pull) method is drawn in source.Load balance factor method is given defeated by being drawn on Smith circle diagrams
Enter the grade output power curve of different loads impedance value under power situation, so that it is determined that optimum load impedance value.Source traction method
It is similar with load balance factor method.On this basis, in order to realize in broadband type E class power amplifiers, in designed frequency band equally spaced
Several frequency points are chosen, try to achieve its optimum load impedance respectively, and take its average to be set to targeted loads impedance and target source impedance.
In practice, the value of load is not generally identical with target impedance value, and target impedance value is generally plural number,
It is not pure resistance.Active component progress of the Chebyshev's impedance inverter circuit (match circuit) to target impedance is designed herein
Match somebody with somebody, design reactance compensation circuit compensates the reaction component of target impedance.The principle of reactance compensation circuit as shown in figure 4,
By rationally designing parameter so that the equivalent reactance of parallel connection part and part in series is mended mutually in wider frequency rate band in circuit
Repay, keep the constant of overall equivalent reactance.First introduce below load balance factor and source traction design, then introduce respectively match circuit and
The design of reactance compensation circuit.
Design process is as follows：
(1) source impedance is arbitrarily given first, carries out load balance factor, chooses optimum load impedance.
(2) optimum load impedance is set, source traction is carried out, determines optimum source impedance.
(3) optimum source impedance in (2) is set, (1) is repeated and determines optimum load impedance.
(4) constantly carry out circulating the optimum source impedance for reaching stable and load impedance.
(5) chosen at equal intervals under required frequency band frequency point carry out load balance factor and source traction, obtain targeted loads impedance and
Target source impedance.
(6) match circuit uses Chebyshev's impedance inverter circuit, consults the design of Chebyshev's impedance transformer design book
Each component parameters, the real part of practical impedance and target impedance is matched.
(7) each original paper parameter of impedance inverter circuit is finely adjusted using ADS software smith circle diagrams, ensures circuit
Filtering characteristic and transmission characteristic in the case where designing frequency band, complete the design of match circuit.
(8) reactance compensation circuit is designed each component parameters of reactance compensation circuit, is made portion in parallel using single reactance compensation method
The equivalent reactance with part in series is divided to be mutually compensated under broadband, the imaginary part of overall reactance and target impedance matches.
(9) each original paper parameter of reactance compensation circuit is finely adjusted using ADS software smith circle diagrams, ensures circuit
Equivalent reactance in the case where designing frequency band is kept constant, and completes the design of reactance compensation circuit.
3. Feedback Design
For the transistor for being operated in radio frequency band, stabilization is vital.Stability is also amplifier circuit
A most important condition must being fulfilled for.Only stablize, just can guarantee that circuit is no lack of the trend vibrated.In order to
So that circuit stability COEFFICIENT K>1, the following measure of generally use：
(1) it is directly grounded in gate pole by capacitance and small resistor.
(2) in gate pole series resistor and capacitance parallel circuit.
(3) in gate pole and gate pole biasing power-up resistance
(4) feedback circuit is added
The present invention is to take (4) measure, that is, adds feedback circuit, and the schematic diagram of feedback circuit is as shown in Figure 5.
When certain factor causes transistor drain output signal increase, the amount of negative feedback network feedback increases therewith, should
After feedback quantity makes the difference with original input signal, original input signal reduces, so as to cause the output quantity reduction that drains.Therefore, negative-feedback net
Network is the loop of a Gain Automatic adjusting, and the final result of adjusting is that the drain change of output quantity is suppressed.But its shortcoming exists
In this gain flattening technology is to reduce gain and efficiency as cost.
In order to enable the circuitry to the work of stabilization, there is better performance, there is provided good DC power supply is required.If
Power supply is considered in meter there may be ripple, while prevents the self-excitation of circuit, improves the efficiency of circuit, devises power supply filter
Wave circuit, is mainly completed using capacitance, and the selection of capacitance value is related with circuit power frequency, and it is all to use to be typically chosen
C=l/f.This value, while several values are respectively taken up and down in this value again.
When certain factor causes power tube drain electrode output signal Xo increase so that into feedback circuit signal Xf therewith into
Ratio increases, and due to entering gate signal Xi=Xs-Xf, therefore Xi will reduce in the case of gate pole bias voltage is constant, and due to
Drain electrode output signal Xo=AXi, so Xo will also reduce.Therefore, negative feedback network is the loop of a Gain Automatic adjusting, is adjusted
The final result of section is that the change of drain electrode output quantity is suppressed.But it is the disadvantage is that, this gain flattening technology is to reduce
Gain and efficiency are cost.
4. realize step：
1) broadband E power-like amplifier power tubes are chosen, inquiry Datasheet has found that MRF6V2150NBR1 meets us
Requirement of experiment.
2) DC analysis is carried out to the power tube of selection, determines its quiescent point.
3) stability analysis is carried out to choosing power tube, the coefficient of stability is more than 1, that is, thinks stable.
4) design of basic parameter is carried out to broadband E classes power amplifier.
5) reactance compensation circuit, match circuit are designed.
6) low-pass elliptic filter is designed.
7) design of the electric source filter circuit of gate pole bias voltage and power tube drain electrode supply voltage.
8) emulation of stability, output performance (gain, power, efficiency etc.) is carried out to whole circuit.
9) power amplifier is made.
5. the immediate prior art
Broadband E power-like amplifiers have a variety of different topology structures, main difference is that reactance compensation circuit is with matching electricity
The implementation method on road, the immediate broadband E power-like amplifiers of the present invention, as shown in Figure 6.
Wherein, high frequency choke coil RFC2 provides a constant direct current for drain electrode, and R1, C10 improve the stabilization of power tube
Property, by the real number that C17, C18, C19 and L4, L5, L6 are formed to plural Chebyshev's low pass impedance translation circuit, possess certain
The function of reactance compensation, impedance conversion and filtering, circuit structure is compared simply, but the frequency characteristic of reactance compensation is poor, and by
There are certain higher hamonic wave in unspecial filter circuit, output voltage.C16 is a parallel equivalent capacitance, by opening
Pipe drain-source the two poles of the earth output equivalent capacitance is closed to form with external ground capacity.Under the action of pumping signal, transistor is in switch work
Make state.When transistor saturation conduction, collector voltage waveform is determined by transistor；When the transistor is turned off, collector electricity
Corrugating is determined by the transient response of laod network.
Claims (9)
1. a kind of list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers, its composition include：It is defeated
Enter signal (1), input matching circuit (2), input reactance compensation circuit (3), gate pole bias supply (4), electric source filter circuit
(5), power tube (6), feedback circuit (7), drain electrode power supply (8), electric source filter circuit (9), output reactance compensation circuit
(10), output matching circuit (11), low pass ellipse filter circuit (12), output signal (13), it is characterised in that：Input signal
(1) electric source filter circuit is passed through by input matching circuit (2) and input reactance compensation circuit (3), gate pole bias supply (4)
(5) power tube (6) front end is connected to, feedback circuit (7) is parallel to power tube (6) both ends, and drain electrode power supply (8) is filtered by power supply
Wave circuit (9) is connected to power tube (6) rear end, and output reactance compensation circuit (10) output matching circuit is passed through in power tube (6) output
(11) with low pass ellipse filter circuit (12), signal (13) is exported.
2. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The input matching circuit (2) is made of C2, C3, C4 and L1, L2, L3, and L1, L2, L3 are series at circuit
In, C2, C3, C4 earth.
3. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The input reactance compensation circuit (3) is made of L4, L5 and C5, C6, and L4 and C5 are series in circuit, L5
It is series in gate pole bias supply branch, C6 simultaneously connects ground.
4. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The electric source filter circuit (5) is made of C7, C8, C9, C10, C11 earth.
5. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The feedback circuit (7) is connected between power tube Q drain electrodes and gate pole by R1 and C12 and formed.
6. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The electric source filter circuit (9) is made of C13, C14, C15, C16, C17 earth.
7. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The output reactance compensation circuit (10) is made of L6, L7 and C18, C19, and L7 and C19 are series at circuit
In, L6 is series in drain electrode power supply branch, and C18 simultaneously connects ground.
8. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The output matching circuit (11) is made of C20, C21, C22 and L8, L9, L10, and L8, L9, L10 are series at
In circuit, C20, C21, C22 earth.
9. list reactance compensation magnet coupled resonant type wireless electric energy transmission broadband E power-like amplifiers according to claim 1,
It is characterized in that：The low pass ellipse filter circuit (12) is made of C23, C24, C25, C26, C27 and L11, L12, L13,
L11 parallel connection C26, L12 parallel connections C27, be series in circuit, C23, C24, C25 earth together with L13.
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Cited By (1)
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| CN108736847B (en) * | 2018-07-24 | 2023-09-01 | 成都嘉纳海威科技有限责任公司 | High-efficiency inverse D-type stacked power amplifier based on accurate resonant circuit control |
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Application publication date: 20180501 |