CN208862765U - A kind of high-power voltage-controlled type negative resistance for resonance circuit - Google Patents
A kind of high-power voltage-controlled type negative resistance for resonance circuit Download PDFInfo
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- CN208862765U CN208862765U CN201821495548.8U CN201821495548U CN208862765U CN 208862765 U CN208862765 U CN 208862765U CN 201821495548 U CN201821495548 U CN 201821495548U CN 208862765 U CN208862765 U CN 208862765U
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Abstract
The utility model discloses a kind of high-power voltage-controlled type negative resistances for resonance circuit, including connected exchange controlled current source and control circuit, the exchange controlled current source and control circuit are connected with resonance circuit respectively, the control circuit includes the switch drive module being sequentially connected, zero crossing comparison module, phase compensation block and voltage sample module, the input voltage of the voltage sample module samples resonance circuit, the square wave with the complete reverse phase of input voltage is converted into through phase compensation block and zero crossing comparison module, the driving signal of switching device is generated to exchanging controlled current source through switch drive module, the exchange controlled current source generates fundamental current according to driving signal between positive output end and negative output terminal.Different capacity grade may be implemented in the utility model, has the characteristics that working characteristics is flexible, online adjustable, the practical application for negative resistance in various power occasions provides reference.
Description
Technical field
The utility model relates to the technical fields of negative resistance construction, refer in particular to a kind of high-power electricity for resonance circuit
Press control type negative resistance.
Background technique
Negative resistance is the Single port active component for meeting Ohm's law.Existing negative resistance construction is broadly divided into three kinds: one
It is that the element for having negative resistance effect is constituted using semiconductor material；Second is that using non-linear element (diode and transistor etc.) and
Positive resistance constitutes negative resistance；Third is that forming negative impedance converter using operational amplifier and positive resistance.Due to method constructed above
The active power of output is limited, offsets positive resistance commonly used in microwave radio circuit and improves resonator quality factor；Or for non-
Linear circuit studies dynamic behaviors such as nonlinear system fork or chaos etc..Scholar has found negative resistance answering for power occasion
With also having significant advantage, such as it can effectively improve using negative resistance the transmission characteristic of radio energy transmission system.However,
The building method of existing negative resistance is concentrated mainly on small-power negative resistance, seriously limits negative resistance at such several hundred supreme kilowatts
Large-power occasions application.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, propose a kind of for the high-power of resonance circuit
Different capacity grade may be implemented in voltage-controlled type negative resistance, has the characteristics that working characteristics is flexible, online adjustable, is negative electricity
The practical application hindered in various power occasions provides reference.
To achieve the above object, technical solution provided by the utility model are as follows: a kind of for the high-power of resonance circuit
Voltage-controlled type negative resistance, including connected exchange controlled current source and control circuit, the exchange controlled current source and control
Circuit is connected with resonance circuit respectively, wherein the control circuit includes the switch drive module being sequentially connected, Zero-cross comparator mould
Block, phase compensation block and voltage sample module, the input voltage of the voltage sample module samples resonance circuit, are mended through phase
It repays module and zero crossing comparison module is converted into square wave with the complete reverse phase of input voltage, generate switching device through switch drive module
Driving signal to controlled current source is exchanged, the exchange controlled current source is according to driving signal in positive output end and negative output terminal
Between generate fundamental current.
Further, the exchange controlled current source is by that can export the high-frequency electrical flow pattern inverter circuit of high-frequency alternating current
It constitutes, the high-frequency electrical flow pattern inverter circuit output fundamental current differs 180 degree with input voltage phase, exports wattful power outward
Rate.
Further, the phase compensation block can be according to external resonance circuit adjust automatically phase offset, through phase compensation
Voltage signal afterwards always with the same phase of input voltage.
The utility model compared with prior art, have the following advantages that with the utility model has the advantages that
High-power voltage-controlled type negative resistance provided by the utility model for resonance circuit, can work in input voltage
The case where i.e. negative resistance both end voltage is high frequency, the relationship of input current and input voltage meets at resonance frequency
Negative resistance relationship, and the negative resistance power grade that the utility model is realized determines that negative resistance has by exchange controlled current source
The efficiency that source device converts active power of output is higher, therefore can be applied to different capacity grade high efficiency application.Wherein,
Using high-frequency electrical flow pattern inverter circuit as exchange controlled current source, its main feature is that: first, exportable high-frequency alternating current
Pressure meets the needs of exchange negative resistance high frequency operation；Second, control circuit is analog circuit, and control precision is high and dynamic is rung
Answer speed fast, system starting of oscillation does not need start-up circuit；Third, the watt level of negative resistance by high-frequency electrical flow pattern inverter circuit volume
Determine power decision, the negative resistance of different capacity grade can be realized by the running parameter of design inverter circuit；4th, high frequency
Switching device is able to achieve no-voltage turn-on and turn-off in current-mode inverter circuit, and switching loss reduces, and greatly improves negative electricity
Resistance operation whole efficiency；Practical application of the above feature for negative resistance in various power occasions provides reference.
Detailed description of the invention
Fig. 1 is the negative resistance illustraton of model provided in embodiment.
Fig. 2 is the circuit diagram for realizing negative resistance in embodiment using push-pull type current source inverter.
The waveform diagram of input current and control circuit signal when Fig. 3 is circuit starting of oscillation shown in Fig. 2 in embodiment.
The waveform diagram of input voltage and input current when Fig. 4 is circuit stable state shown in Fig. 2 in embodiment.
Specific embodiment
Specific implementation for the content and feature that the utility model is further described, below in conjunction with attached drawing to the utility model
Scheme is specifically described.But the implementation and protection of the utility model are without being limited thereto.
As shown in Figure 1, the high-power voltage-controlled type negative resistance of resonance circuit is used for provided by the present embodiment, it is basic
Principle is using the output electric current of the zero crossing information control exchange controlled current source of the resonance potential of resonance circuit, so that circuit
Input current fundamental wave amount always with input voltage reverse phase, entire circuit is equivalent to a negative resistance 8, including connected exchange
Controlled current source 1 and control circuit 3, the exchange controlled current source 1 and control circuit 3 are connected with resonance circuit 2 respectively, described
Control circuit 3 includes switch drive module 4, zero crossing comparison module 5, phase compensation block 6 and the voltage sample mould being sequentially connected
Block 7, the input voltage u of 7 sampling harmonic circuit 2 of voltage sample modulein, converted through phase compensation block 6 and zero crossing comparison module 5
For with input voltage uinThe square wave of complete reverse phase, the driving signal for generating switching device through switch drive module 4 are controlled to exchanging
Current source 1, according to driving signal, the port between positive output end P and negative output terminal N generates fundamental current to exchange controlled current source 1
iF。
In above-mentioned negative resistance, input voltage fundamental wave amount and input current fundamental wave amount meet known to Ohm's law:
Exchanging controlled current source is made of the high-frequency electrical flow pattern inverter circuit of exportable high-frequency alternating current, can be outside
Active power of output meets negative resistance property.The basic functional principle of high-frequency electrical flow pattern inverter circuit is by input voltage uinTurn
The switching drive signal of same phase is turned to, for driving the switching tube in inverter circuit, thus the output fundamental current of control circuit
iF, so that input voltage uinAt resonance frequency always with input current iinFundamental wave amount reverse phase always.
Control circuit principle is voltage sample module samples input sinusoidal voltage uin, obtain sampled voltage signal uS, voltage
Sampling module includes energy-storage travelling wave tube, uSWith uinPhase shift, phase compensation block is to sampled voltage signal uSCarry out phase
The u ' obtained after the compensation of positionSAlways with input voltage uinSame phase.Sampled voltage signal u ' after phase compensationSThrough Zero-cross comparator
Module converter is square-wave signal, is sent to switch drive module, thus high-frequency electrical flow pattern inverter circuit is according to driving signal positive and negative
Output port generates fundamental current iF。
In this example, high-frequency electrical flow pattern inverter circuit uses push-pull type current source inverter, as shown in Fig. 2, wherein L1、C1
And R1For antiresonant circuit, S1And S2Alternately each conducting 180 degree, switching tube S1Drive waveforms and input voltage uinReverse phase is opened
Close pipe S2Drive waveforms and input voltage uinSame phase, i.e., as input voltage uinWhen < 0, switching tube S is opened1So that iin>0；When defeated
Enter electric current uinWhen > 0, switching tube S is opened2So that iin< 0, switch drive module according to input voltage uinThe square-wave signal of reverse phase
uDSinusoidal pulse width modulation control signal is generated with driving switch pipe.Assuming that inductance LdcIt is sufficiently large, flow through inductance LdcCurrent value it is close
Like constant for I0, then the output current first harmonics amount i of push-pull type current source inverterFAre as follows:
iF(t)=MI0 sin(ωt) (1)
Wherein M is pulsewidth modulation ratio.
Assuming that input current fundamental wave iFIt is with phasor representationInput voltage phasor representation isThen have:
The switching drive signal that high-frequency electrical flow pattern inverter circuit switching tube is generated by control circuit as shown in Figure 1 drives,
So that input voltageAlways with input fundamental currentReverse phase, the at this time running frequency of system are as follows:
Corresponding negative resistance resistance value at this time are as follows:
RN=-R1 (4)
By formula (3) and (4) it is found that the working frequency and resistance value of negative resistance are related with resonance circuit.
Below with reference to the basic principle of control circuit in push-pull type current source inverter explanatory diagram 1 as shown in Figure 2, control
Circuit is broadly divided into four parts: voltage sample module, phase compensation block, zero crossing comparison module and switch drive module.Electricity
When road starts, DC voltage source is applied on capacitor C1, switching tube S1Initial driving signal ug1Show as positive level conducting and
Switching tube S2Initial driving signal ug2Zero level shutdown is shown as, as shown in figure 3, DC voltage source Vdc, inductance LdcWith L1、C1
And R1Parallel resonance branch constitutes circuit, capacitor C1Both ends start to generate oscillating voltage, and the information of voltage is after voltage sample module
USThere are phase offsets, the information of voltage u ' after phase compensation blockSAlways with input voltage uinSame-phase, through zero passage
Square wave is converted into after comparison module, switch drive module generates sinusoidal pulse width modulation control signal according to square-wave signal and drives inverse
Power transformation way switch pipe.
Assuming that high-frequency inverter circuit input DC power voltage is 50V, DC inductance Ldc=5mH, when outside negative resistance both ends
When connecing LRC parallel resonance branch, the parameter of antiresonant circuit are as follows: L1=300 μ H, C1=211.11pF, R1=100 Ω.Circuit
Input voltage and input current waveform into stable state post-simulation is as shown in Figure 4.The working frequency of negative resistance is fS=20kHz,
The resistance value of negative resistance is RN=-100 Ω.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by described
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (3)
1. a kind of high-power voltage-controlled type negative resistance for resonance circuit, it is characterised in that: controlled including connected exchange
Current source (1) and control circuit (3), the exchange controlled current source (1) and control circuit (3) respectively with resonance circuit (2) phase
Even, wherein the control circuit (3) includes the switch drive module (4) being sequentially connected, zero crossing comparison module (5), phase compensation
Module (6) and voltage sample module (7), the input voltage of voltage sample module (7) the sampling harmonic circuit (2), through phase
Compensating module (6) and zero crossing comparison module (5) are converted into the square wave with the complete reverse phase of input voltage, through switch drive module (4)
The driving signal of switching device is generated to exchanging controlled current source (1), the exchange controlled current source (1) exists according to driving signal
Fundamental current is generated between positive output end (P) and negative output terminal (N).
2. a kind of high-power voltage-controlled type negative resistance for resonance circuit according to claim 1, it is characterised in that:
Exchange controlled current source (1) is made of the high-frequency electrical flow pattern inverter circuit that can export high-frequency alternating current, the height
Frequency current-mode inverter circuit output fundamental current differs 180 degree, outside active power of output with input voltage phase.
3. a kind of high-power voltage-controlled type negative resistance for resonance circuit according to claim 1, it is characterised in that:
Through the phase compensation block (6) compensated voltage signal always with the same phase of input voltage.
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| CN201821495548.8U CN208862765U (en) | 2018-09-13 | 2018-09-13 | A kind of high-power voltage-controlled type negative resistance for resonance circuit |
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| CN201821495548.8U CN208862765U (en) | 2018-09-13 | 2018-09-13 | A kind of high-power voltage-controlled type negative resistance for resonance circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149979A (en) * | 2018-09-13 | 2019-01-04 | 华南理工大学 | A kind of high-power voltage-controlled type negative resistance for resonance circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149979A (en) * | 2018-09-13 | 2019-01-04 | 华南理工大学 | A kind of high-power voltage-controlled type negative resistance for resonance circuit |
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