CN102611325A - Inverter circuit load matching method based on high-level resonance technique - Google Patents
Inverter circuit load matching method based on high-level resonance technique Download PDFInfo
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- CN102611325A CN102611325A CN2012100725219A CN201210072521A CN102611325A CN 102611325 A CN102611325 A CN 102611325A CN 2012100725219 A CN2012100725219 A CN 2012100725219A CN 201210072521 A CN201210072521 A CN 201210072521A CN 102611325 A CN102611325 A CN 102611325A
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Abstract
The invention discloses an inverter circuit load matching method based on the high-level resonance technique. The method includes: analyzing basic characteristics of three level or above resonance circuits, simplifying parameter relation, drawing an expression of voltage gain M or current gain d, drawing a relation curve, and analyzing the relation curve, selecting required voltage gain M value, quality factor Q value, inductance ratio or capacitance ratio K value and frequency ratio fn value according to the curve to obtain tank circuit parameters. After the parameters are selected by the method, two traditional energy storage elements are replaced by three or more energy storage elements in a load to replace a high-frequency and high-power matching transformer. Power sources using the method for load matching are efficient, low in cost and simple in design and production process. Cost and design difficulty in use of high-frequency, high-voltage and high-power transformers are lowered, the size and loss of a system are further reduced, and efficiency is improved.
Description
Technical field
The invention belongs to electronic power inverter output and high-frequency convertor technology field; Relate to a kind of method based on the technological inverter circuit load matched of higher order resonances; Be specifically related in inverter power supply or the high frequency chain Switching Power Supply load matched method when not needing transformer isolation or be difficult to make hypermutation ratio, high-frequency high-power transformer.
Background technology
Coupling for the rated power grade of the voltage of realizing AC power output or electric current and load generally adopts transformer, voltage or electric current is carried out conversion, thereby reach the purpose of load matched.Improve the operating frequency of inverter switch device, can improve the performance of Switching Power Supply, can improve power-efficient and power density again, make that power supply is more reliable, volume is littler, more energy-conservation.But under high frequency, conventional transformer coupling, promptly electromagnetic coupling closes the having relatively high expectations of transformer, cost expensive.When the design matching transformer, mainly receive restriction unshakable in one's determination.The common low-cost transformer fe cardiac efficiency of when high-power, high frequency, being processed by silicon steel sheet etc. is low, volume is big, noise is big.The ferrite class volume unshakable in one's determination that obtains fine use at high frequency, small-power power is restricted again aborning, is inappropriate in large-power occasions and uses.Though there is the amorphous core material that is fit to very much design high-frequency high-power power transformer to be applied now, this complex manufacturing unshakable in one's determination, cost is very high.In addition, the high-power high-frequency transformer of design and manufacturing hypermutation ratio also exists technology and technologic difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of method of the inverter circuit load matched based on higher order resonances technology, the resonant groove path equivalent resistance is different to be mated load thereby make, and replaces the high-frequency high-power matching transformer, with realize efficiently, load matched cheaply.
The technical scheme that the present invention adopted is, a kind of method of the inverter circuit load matched based on the higher order resonances technology, and this method is carried out according to the following steps:
The first step is analyzed the fundamental characteristics of three rank and above resonant circuit
Distinguish the resonant circuit characteristic, promptly discrimination circuit is voltage-type resonant circuit or current mode resonant circuit, obtains each parameter of resonant groove path then: the resonance frequency f of resonant groove path
r, inverter switching frequency f
s, the tank circuit is to the rule of conversion of voltage or electric current, i.e. the expression formula of voltage gain M or current gain d,
If resonant circuit is a voltage-type resonance, then analyze and obtain voltage gain M,
U wherein
0Be the output voltage of resonant groove path, U
InBe the input voltage of resonant groove path,
If resonant circuit is a current mode resonance, according to the circuit principle of duality, then analyze and obtain current gain d,
I wherein
OBe the output current of resonant groove path, I
InInput current for resonant groove path;
Second step, the reduced parameter relation
Introduce the intrinsic parameter of resonant groove path, its intrinsic parameter comprises: the relation of the resonance frequency of quality factor q, inverter switching frequency and resonant groove path, i.e. frequency ratio f
n, the resonant groove path inductance than or capacity ratio K, wherein
w
sBe switching tube operating angle frequency,
With each parameter in the expression formula of M in the first step or d with Q, f
nSimplify with K, obtain M or d about Q, f
nExpression formula with K;
In the 3rd step, draw relation curve
The expression formula of second M that obtain of step or the expression formula of d are drawn out a, two groups of relation curves of b:
The a sets of curves is certain for working as the K value, frequency ratio f
nChange curve for abscissa;
The b sets of curves is f
nValue is certain, and resonant groove path inductance ratio or capacity ratio K are the change curve of abscissa;
Wherein, in a, b two sets of curves, if resonant circuit is the voltage-type resonant circuit, its ordinate is voltage gain M; If resonant circuit is the current mode resonant circuit, its ordinate is current gain d;
The 4th step, tracing analysis
Curve to the 3rd step obtained is analyzed,
For a sets of curves, if will realize antihypertensive effect, then ordinate voltage gain M less than 1 zone in the selection respective value; If will realize the effect of boosting, then voltage gain is selected respective value at M greater than 1 zone;
For the voltage-type resonant circuit, select f
nZone greater than 1, the current mode resonant circuit is selected f
nZone less than 1;
Thereby obtain the corresponding realization function that meets through Curve selection, promptly boost or the M of step-down requirement and the scope of Q;
For the b sets of curves, in conjunction with the scope of resulting M of a sets of curves and Q, select the bigger at interval zone of each curve in this sets of curves, thereby confirm the scope of resonant groove path inductance relation or capacitance relation K,
Comprehensively, obtain satisfactory M, Q, K and f to above-mentioned a, b two sets of curves analyses
nValue, thereby obtain tank circuit parameter, promptly form the inductance and the capacitance of resonant circuit.
The invention has the beneficial effects as follows, after through method of the present invention parameter being selected, in load, replace two traditional energy-storage travelling wave tubes to replace the high-frequency high-power matching transformers with three or more energy-storage travelling wave tube.Power efficient, the cost that carries out load matched in this way is low, design and production technology are simple.Reduced because of using the cost and the difficult design of high-frequency and high-voltage high power transformer, further reduced the volume and the loss of system, improved efficient.
Description of drawings
Fig. 1 is the overall structure figure of higher order resonances inverter system among the embodiment;
Fig. 2 is the graph of relation that utilizes the intrinsic parameter of voltage source inverter resonant groove path that matlab draws out, and wherein a is the change curve of M with frequency, and b is that M is with the resonant parameter change curve;
Fig. 3 is the analytical characteristics curve of higher order resonances emulation experiment, and wherein a is the characteristic curve of resonance topological 1, and b is the characteristic curve of resonance topological 2.
Among the figure, 1. exchange input, 2. control rectifying circuit not, 3. filter circuit, 4. full bridge inverter, 5. based on the load matched circuit of load resonant, 6. high frequency transformer, 7. ohmic load.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The present invention provides a kind of method based on the technological inverter circuit load matched of higher order resonances, and this method is carried out according to the following steps:
The first step is analyzed the fundamental characteristics of three rank and above resonant circuit
Distinguish the resonant circuit characteristic, promptly discrimination circuit is voltage-type resonant circuit or current mode resonant circuit, obtains each parameter of resonant groove path then: the resonance frequency f of resonant groove path
r, inverter switching frequency f
s, the tank circuit is to the rule of conversion of voltage or electric current, i.e. the expression formula of voltage gain M or current gain d,
If resonant circuit is a voltage-type resonance, then analyze and obtain voltage gain M,
U wherein
0Be the output voltage of resonant groove path, U
InBe the input voltage of resonant groove path,
If resonant circuit is a current mode resonance, according to the circuit principle of duality, then analyze and obtain current gain d,
I wherein
OBe the output current of resonant groove path, I
InInput current for resonant groove path;
Second step, the reduced parameter relation
Introduce the intrinsic parameter of resonant groove path, its intrinsic parameter comprises: the relation of the resonance frequency of quality factor q, inverter switching frequency and resonant groove path, i.e. frequency ratio f
n, the resonant groove path inductance than or capacity ratio K, wherein
w
sBe switching tube operating angle frequency,
With each parameter in the expression formula of M in the first step or d with Q, f
nSimplify with K, obtain M or d about Q, f
nExpression formula with K;
In the 3rd step, draw relation curve
The expression formula of second M that obtain of step or the expression formula of d are drawn out a, two groups of relation curves of b:
The a sets of curves is certain for working as the K value, frequency ratio f
nChange curve for abscissa;
The b sets of curves is f
nValue is certain, and resonant groove path inductance ratio or capacity ratio K are the change curve of abscissa;
Wherein, in a, b two sets of curves, if resonant circuit is the voltage-type resonant circuit, its ordinate is voltage gain M; If resonant circuit is the current mode resonant circuit, its ordinate is current gain d;
The 4th step, tracing analysis
Curve to the 3rd step obtained is analyzed,
For a sets of curves, if will realize antihypertensive effect, then ordinate voltage gain M less than 1 zone in the selection respective value; If will realize the effect of boosting, then voltage gain is selected respective value at M greater than 1 zone;
For the voltage-type resonant circuit, select f
nZone greater than 1, the current mode resonant circuit is selected f
nZone less than 1;
Thereby obtain the corresponding realization function that meets through Curve selection, promptly boost or the M of step-down requirement and the scope of Q;
For the b sets of curves, in conjunction with the scope of resulting M of a sets of curves and Q, select the bigger at interval zone of each curve in this sets of curves, thereby confirm the scope of resonant groove path inductance relation or capacitance relation K,
Comprehensively, obtain satisfactory M, Q, K and f to above-mentioned a, b two sets of curves analyses
nValue, thereby obtain tank circuit parameter, promptly form the inductance and the capacitance of resonant circuit.
Embodiment
As shown in Figure 1; The overall structure figure of higher order resonances inverter system; Mainly comprise successively the following components that connects: exchange input 1, not control rectifying circuit 2, filter circuit 3, full bridge inverter 4, load matched circuit 5, high frequency transformer 6 and ohmic load 7 based on load resonant; If do not need under the situation of electrical isolation, high frequency transformer 6 is omissible.
To circuit as shown in Figure 1, through analyzing, present embodiment is a voltage source inverter.Analyze each parameter of resonant groove path then: the resonance frequency f of resonant groove path
r, inverter switching frequency f
sWith the rule of conversion of the tank circuit to voltage, the i.e. expression formula of voltage gain M.
Introducing the intrinsic parameter of resonant groove path comprises: quality factor
W wherein
sResonance frequency relation for angular frequency, inverter switching frequency and the resonant groove path of switching tube
Resonant groove path inductance and capacitance relation K, thus voltage gain M obtained, i.e. the output-input voltage of resonant groove path ratio
The simplification expression formula, utilize MATLAB analysis tool programming to provide relation curve again.
Shown in the MATLAB curve of Fig. 2; A is under the certain prerequisite of K value; M is with the change curve of frequency ratio
: realize antihypertensive effect; Will select less than 1 zone at ordinate voltage gain M, realize the effect of boosting, will select greater than 1 zone by M; Wherein the step-down and the zone of boosting are divided into high frequency region and low frequency range again separately; The zone of abscissa
greater than 1 is high frequency region, and
zone less than 1 is a low frequency range.General, when resonant circuit is operated in high frequency region, present perceptual state; When resonant circuit is operated in low frequency range, present the capacitive state, will guarantee that for voltage source inverter it is operated in perceptual state, select parameter so this topology should be slightly larger than 1 place at abscissa.Then, based on resonance circuit the function that will realize, promptly boost or step-down, decide in which zone and select parameter.For topology 1, because the trend of curve is suitable as stepup transformer more and uses.It should be noted that in this topology when the ratio of resonance frequency is 1, when promptly switching frequency equaled resonance frequency, all curves met at same point, circuit generation this moment resonance; When abscissa was slightly larger than 1, along with the variation of quality factor q, the variation of ordinate voltage gain M was comparatively obvious, and promptly M receives the influence of load bigger, so require to select suitable Q value, just can meet the requirements.
B is resonance frequency f among Fig. 2
nValue one regularly, M is with the resonant parameter change curve: abscissa is resonant groove path inductance relation and capacitance relation K among the figure, and ordinate is voltage gain M; As can be seen from the figure, after abscissa was greater than 0.4, the change of curve was very little; Do not have the value of research, we can ignore; Between 0 to 0.4, we can select the proportionate relationship of suitable capacitor and inductor according to the requirement of the voltage gain of reality in conjunction with the analysis of a figure among Fig. 1.
The to sum up analysis of two figure can obtain meeting voltage gain M, quality factor q and the tank circuit parameter of design demand, promptly forms the inductance and the capacitance of resonant circuit.
According to the characteristic curve of analyzing and obtaining, combine inverter output voltage or electric current, power requirement, optimization resonant groove path parameter reaches the matching effect of inverter output loading.
Resonant circuit among the embodiment is carried out simulating, verifying.
As shown in Figure 3; A is that higher order resonances topology 1 is according to the analytical characteristics curve; The voltage-contrast figure that the resonant element parameter of using calculation of parameter such as combining switching frequency to obtain is carried out emulation, square-wave voltage is the inverter output voltage before the conversion among the figure, sine wave is the inverter output voltage after the conversion; This shows that this higher order resonances circuit realized the matching effect of load, has carried out boosting and filter effect; Same, b has also realized the matching effect of load for the voltage-contrast figure of topology 2 shows the higher order resonances circuit of topology 2, has carried out boosting and filter effect.
Because there is the principle of duality in circuit, the current mode harmonic analysis has identical analytic process with voltage-type resonance.
The different resonant groove path that method of the present invention constitutes a plurality of energy-storage travelling wave tubes; After carrying out parameters of choice through method of the present invention; Make the resonant groove path equivalent resistance different and reach the purpose that load is mated to the design of resonant element and different combinations; Thereby replace the high-frequency high-power matching transformer, with realize efficiently, load matched cheaply.Also be called the electrostatic induction matching method here.
The principle of the inventive method is exactly with three or two traditional energy-storage travelling wave tubes replacement high-frequency high-power matching transformers of more energy-storage travelling wave tube replacement in load.Power efficient, the cost that carries out load matched in this way is low, design and production technology are simple.Reduced because of using the cost and the difficult design of high-frequency and high-voltage high power transformer, further reduced the volume and the loss of system, improved efficient.
Claims (1)
1. method based on the inverter circuit load matched of higher order resonances technology, it is characterized in that: this method is carried out according to the following steps:
The first step is analyzed the fundamental characteristics of three rank and above resonant circuit
Distinguish the resonant circuit characteristic, promptly discrimination circuit is voltage-type resonant circuit or current mode resonant circuit, obtains each parameter of resonant groove path then: the resonance frequency f of resonant groove path
r, inverter switching frequency f
s, the tank circuit is to the rule of conversion of voltage or electric current, i.e. the expression formula of voltage gain M or current gain d,
If resonant circuit is a voltage-type resonance, then analyze and obtain voltage gain M,
U wherein
0Be the output voltage of resonant groove path, U
InBe the input voltage of resonant groove path,
If resonant circuit is a current mode resonance, according to the circuit principle of duality, then analyze and obtain current gain d,
I wherein
OBe the output current of resonant groove path, I
InInput current for resonant groove path;
Second step, the reduced parameter relation
Introduce the intrinsic parameter of resonant groove path, its intrinsic parameter comprises: the relation of the resonance frequency of quality factor q, inverter switching frequency and resonant groove path, i.e. frequency ratio f
n, the resonant groove path inductance than or capacity ratio K, wherein
w
sBe switching tube operating angle frequency,
With each parameter in the expression formula of M in the first step or d with Q, f
nSimplify with K, obtain M or d about Q, f
nExpression formula with K;
In the 3rd step, draw relation curve
The expression formula of second M that obtain of step or the expression formula of d are drawn out a, two groups of relation curves of b:
The a sets of curves is certain for working as the K value, frequency ratio f
nChange curve for abscissa;
The b sets of curves is f
nValue is certain, and resonant groove path inductance ratio or capacity ratio K are the change curve of abscissa;
Wherein, in a, b two sets of curves, if resonant circuit is the voltage-type resonant circuit, its ordinate is voltage gain M; If resonant circuit is the current mode resonant circuit, its ordinate is current gain d;
The 4th step, tracing analysis
Curve to the 3rd step obtained is analyzed,
For a sets of curves, if will realize antihypertensive effect, then ordinate voltage gain M less than 1 zone in the selection respective value; If will realize the effect of boosting, then voltage gain is selected respective value at M greater than 1 zone;
For the voltage-type resonant circuit, select f
nZone greater than 1, the current mode resonant circuit is selected f
nZone less than 1;
Thereby obtain the corresponding realization function that meets through Curve selection, promptly boost or the M of step-down requirement and the scope of Q;
For the b sets of curves, in conjunction with the scope of resulting M of a sets of curves and Q, select the bigger at interval zone of each curve in this sets of curves, thereby confirm the scope of resonant groove path inductance relation or capacitance relation K,
Comprehensively, obtain satisfactory M, Q, K and f to above-mentioned a, b two sets of curves analyses
nValue, thereby obtain tank circuit parameter, promptly form the inductance and the capacitance of resonant circuit.
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|---|---|---|---|
| CN201210072521.9A CN102611325B (en) | 2012-03-19 | 2012-03-19 | Inverter circuit load matching method based on high-level resonance technique |
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|---|---|---|---|
| CN201210072521.9A CN102611325B (en) | 2012-03-19 | 2012-03-19 | Inverter circuit load matching method based on high-level resonance technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880253A (en) * | 2018-08-07 | 2018-11-23 | 电子科技大学 | A kind of adaptive ripple Enhancement Method |
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|---|---|---|---|---|
| CN104270007B (en) * | 2014-09-19 | 2016-11-23 | 成都芯源系统有限公司 | Switching power supply circuit and method |
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| US5486993A (en) * | 1992-10-26 | 1996-01-23 | Kasuga Denki, Incorporated | Controlling apparatus for high frequency high voltage power source for corona discharge processing |
| CN201994859U (en) * | 2011-03-03 | 2011-09-28 | 西安理工大学 | Low voltage heavy current switch power supply based on third-order load resonance technology |
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2012
- 2012-03-19 CN CN201210072521.9A patent/CN102611325B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486993A (en) * | 1992-10-26 | 1996-01-23 | Kasuga Denki, Incorporated | Controlling apparatus for high frequency high voltage power source for corona discharge processing |
| CN201994859U (en) * | 2011-03-03 | 2011-09-28 | 西安理工大学 | Low voltage heavy current switch power supply based on third-order load resonance technology |
Non-Patent Citations (2)
| Title |
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| LI JINGANG等: "study on static electricity induction load-matched of voltage-source converter for induction heating", 《IEEE》 * |
| 李金刚等: "电压型感应加热电源静电感应负载匹配电路静特性分析", 《西安理工大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880253A (en) * | 2018-08-07 | 2018-11-23 | 电子科技大学 | A kind of adaptive ripple Enhancement Method |
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