CN104779809A - Cascading type switched capacitor type AC-AC converter for achieving any composite number transformation ratio - Google Patents
Cascading type switched capacitor type AC-AC converter for achieving any composite number transformation ratio Download PDFInfo
- Publication number
- CN104779809A CN104779809A CN201510200082.9A CN201510200082A CN104779809A CN 104779809 A CN104779809 A CN 104779809A CN 201510200082 A CN201510200082 A CN 201510200082A CN 104779809 A CN104779809 A CN 104779809A
- Authority
- CN
- China
- Prior art keywords
- power switch
- electric capacity
- basic element
- converter
- element circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/06—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using impedances
- H02M5/08—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using impedances using capacitors only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage, current or power
- H02M5/2937—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage, current or power using whole cycle control, i.e. switching an integer number of whole or half cycles of the AC input voltage
Abstract
The invention discloses a cascading type switched capacitor type AC-AC converter for achieving any composite number transformation ratio. The cascading type switched capacitor type AC-AC converter is formed by cascading a plurality of basic unit circuits in sequence, each basic unit circuit is composed of a capacitor and a plurality of power switch sets sequentially connected in series, each power switch set comprises two power switch tubes with sources connected in series, capacitors are in parallel connection to the two ends of a part formed by connecting any two adjacent power switch sets in series, and a driving circuit is connected with grids of the power switch tubes. The cascading mode is characterized in that the two ends of the part formed by connecting all power switch sets in the next basic unit circuit are connected to the two ends of any capacitor in the last basic unit circuit in parallel. According to the cascading type switched capacitor type AC-AC converter, the cascading mode is adopted for achieving voltage output of different gears with any composite number transformation ratio, and the cascading type switched capacitor type AC-AC converter can be applied to design of other fixed gear speed regulating; in addition, only the capacitors serve as energy storage elements, so that the size of the converter is reduced, the equivalent internal resistance is small, changes are basically avoided along with increase of the basic unit circuits, and the power density is high.
Description
Technical field
The present invention relates to a kind of nonmagnetic element transforms device, a kind of cascade connection type that especially relate to the technical field of Technics of Power Electronic Conversion realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio.
Background technology
Traditional AC energy conversion adopts electromagnetic transformers usually, has the advantages such as electrical isolation, efficiency is high, capacity is large, but also there is the shortcomings such as volume is large, audio-frequency noise large, harmonic pollution.Traditional electromagnetic transformers can not meet the requirement of electric/electronic device miniaturization simultaneously.
One of key technology of Power electronics system integration is miniaturization and the microminiaturization of magnetic element (inductance or transformer), under soft switch technique, improve switching frequency be undoubtedly a highly effective measure, in such circuit, the volume of inductance and transformer can reduce, and the performance of whole circuit all gets a promotion; But, when switching frequency reaches about 400KHz-500KHz, the loss of main switch and magnetic element increases, conversion efficiency declines, and electromagnetic noise strengthens, for the volume of the filter capacitor of restraint speckle along with increase, improve switching frequency again, negative impact can only being brought, therefore, reducing power volume by the mode improving switching frequency own through there is no leeway.
The basic ideas of element of deperming are the noninductive converters of development, switching capacity type AC-AC converter is exactly a kind of typical noninductive converter, it is combined by the power switch of electric capacity and some, the discharge and recharge of electric capacity, by the control realization to power switch, is realized the circuit of many different no-load voltage ratios by the combination of electric capacity and power switch.
Summary of the invention
In order to solve Problems existing in background technology, further investigation switching capacity type AC-AC converter principle, a kind of cascade connection type is the object of the present invention is to provide to realize closing arbitrarily the switching capacity type AC-AC converter of number no-load voltage ratio, devise structure simple, control new type electronic transformers easy, with low cost to replace traditional transformer, and the voltage realizing the different gears closing arbitrarily number no-load voltage ratio can be reached export simultaneously, can be applicable in the design of other gear speed governing.
The technical solution used in the present invention is:
Form primarily of multiple basic element circuit for realizing input and output 1/N no-load voltage ratio successively cascade, the power switch group that basic element circuit is connected successively by electric capacity and many groups forms, often group power switch group comprises the power switch pipe that two source electrodes are connected mutually, two ends after arbitrary neighborhood two power switch group series connection are all parallel with an electric capacity, and drive circuit is connected with the grid of each power switch pipe; Cascade system is parallel to any electric capacity two ends in upper level basic element circuit for rear two ends of being connected by power switch groups all in secondary one-level basic element circuit, forms described switching capacity type AC-AC converter thus.
In described first order basic element circuit all power switch groups connect successively after two ends as power input, in afterbody basic element circuit, arbitrary electric capacity two ends are as power output end.
In described basic element circuits at different levels, the quantity of electric capacity is identical with the group number of power switch group.
In described basic element circuits at different levels, the quantity of electric capacity is not identical with the group number of power switch group.
The step-down no-load voltage ratio that each basic element circuit reaches is not identical, and the voltage of afterbody basic element circuit power output end and the no-load voltage ratio of power input voltage are the product of the step-down no-load voltage ratio of each basic element circuit, therefore can realize any non-prime no-load voltage ratio.
The input of described converter is electrically connected with the 50Hz city of 220V, and output is connected with load.
Each power switch pipe in described power switch group provides pwm signal to drive by drive circuit, and drive circuit is connected with the grid of each power switch pipe.
The present invention proposes the new approaches of basic element circuit cascade, based on the basic element circuit structure that can realize input and output 1/N no-load voltage ratio, how brand-new circuit topological structure is obtained in order to realize more how different no-load voltage ratios, by basic element circuit cascade, break original intrinsic thinking longitudinally expanded by AC-AC converter, there is great novelty and researching value.
The present invention adopts technique scheme, has following beneficial effect:
The present invention is only using electric capacity as energy-storage travelling wave tube, and drive singal controls conducting and the shutoff of power switch pipe, thus the discharge and recharge time of control capacitance, every one-level basic element circuit is along with the change of more lateral capacitance number N, and corresponding change occurs the no-load voltage ratio of output; By accessing the change of the progression of basic element circuit, realizing step pressure reducing, can realize closing arbitrarily number no-load voltage ratio, select with the change level that this controls to close arbitrarily output voltage number no-load voltage ratio.
The present invention due to not containing magnetic element, therefore has that volume is little, lightweight, power-efficient advantages of higher.Along with the increase of basic element circuit progression in circuit, the equivalent internal resistance of circuit realizes that the equivalent internal resistance of the basic element circuit of input and output 1/N no-load voltage ratio is consistent to remain unchanged substantially with the first order.Meanwhile reduce volume and the weight of converter, improve power density.
Accompanying drawing explanation
Fig. 1 is the circuit topology figure of AC-AC converter of the present invention.
Fig. 2 is that basic element circuit applies voltage to side
Fig. 3 is that in basic element circuit, power switch pipe receives the pwm signal oscillogram driven.
Fig. 4 is the circuit topology figure that embodiment 1 realizes the capacitor type AC-AC converter of 1/6 no-load voltage ratio.
Fig. 5 is the circuit topology figure that embodiment 2 realizes the capacitor type AC-AC converter of 1/12 no-load voltage ratio.
Fig. 6 is input voltage u
ibe electrically connected with the 50Hz city of 220V, be linked into two-stage basic element circuit, after carrying out three dividing potential drops, realize the experimental result of 1/6 no-load voltage ratio.
Fig. 7 is input voltage u
ibe electrically connected with the 50Hz city of 220V, be linked into three grades of basic element circuits, after carrying out three dividing potential drops, realize the experimental result of 1/12 no-load voltage ratio.
In figure: u
i, input voltage, R
l, load resistance, u
o, output voltage, D is the duty ratio of pwm signal, T
sfor the pwm signal cycle.
Embodiment
Be described in detail below in conjunction with the technical scheme of accompanying drawing to invention.
As shown in Figure 1, the present invention is formed primarily of multiple basic element circuit successively cascade: each basic element circuit comprises the power switch group that 2N-1 electric capacity and 2N group are connected successively, as shown in Figure 2,2N group power switch group respectively is the first power switch group, the second power switch group ... 2N power switch group, often group power switch group comprises the power switch pipe that two source electrodes are connected mutually, 2N-1 electric capacity is respectively the first electric capacity, second electric capacity ... 2N-1 electric capacity, the two ends of the first Capacitance parallel connection after the first power switch group and the series connection of the second power switch group, the two ends of the second Capacitance parallel connection after the second power switch group and the series connection of the 3rd power switch group, the two ends of 3rd Capacitance parallel connection after the 3rd power switch group and the series connection of the 4th power switch group, by that analogy, 2N-2 the two ends of Capacitance parallel connection after 2N-2 power switch group and the series connection of 2N-1 power switch group, 2N-1 the two ends of Capacitance parallel connection after 2N-1 power switch group and the series connection of 2N power switch group, two ends now after the input of input voltage is connected to the series connection of power switch group, the output voltage at the two ends of arbitrary electric capacity in first order elementary cell, all can obtain the no-load voltage ratio of the 1/N of input voltage.
As shown in Figure 1, the quantity of described basic element circuit is R, the electric capacity number of R basic element circuit can change arbitrarily, namely the step-down no-load voltage ratio that reaches of R basic element circuit is different, along with the change of more lateral capacitance number N in every one-level basic element circuit, there is corresponding change in the no-load voltage ratio exported, as shown in Figure 1, 2nd grade of basic element circuit comprises the power switch group that 2P-1 electric capacity and 2P group are connected successively, as shown in Figure 1, 2P group power switch group respectively is the first power switch group, second power switch group ... 2P power switch group, often group power switch group comprises the power switch pipe that two source electrodes are connected mutually, 2P-1 electric capacity is respectively the first electric capacity, second electric capacity ... 2P-1 electric capacity, the two ends of the first Capacitance parallel connection after the first power switch group and the series connection of the second power switch group, the two ends of the second Capacitance parallel connection after the second power switch group and the series connection of the 3rd power switch group, the two ends of 3rd Capacitance parallel connection after the 3rd power switch group and the series connection of the 4th power switch group, by that analogy, 2P-2 the two ends of Capacitance parallel connection after 2P-2 power switch group and the series connection of 2P-1 power switch group, 2P-1 the two ends of Capacitance parallel connection after 2P-1 power switch group and the series connection of 2P power switch group, two ends now after the input all power switch groups be connected in the 2nd grade of basic element circuit of the input voltage of front end are connected, the output voltage at the two ends of arbitrary electric capacity in 2nd grade of elementary cell, all can obtain the no-load voltage ratio of the 1/P of input voltage, by that analogy, as shown in Figure 1, the output voltage at the two ends of arbitrary electric capacity in R level basic element circuit, all can obtain the no-load voltage ratio of the 1/Q of input voltage.
Cascade system is the two ends that two ends after being connected by all power switch group in next basic element circuit are connected to arbitrary electric capacity in previous basic element circuit, every one-level is all connected on last basic element circuit in the mode of cascade, the voltage of afterbody basic element circuit power output end and the no-load voltage ratio of power input voltage are the product of the step-down no-load voltage ratio of R level basic element circuit, as shown in Figure 1, namely no-load voltage ratio is 1/ (NP ... Q), therefore can realize closing arbitrarily number no-load voltage ratio, form AC-AC converter of the present invention thus.
In the first order basic element circuit 2N group power switch group connect successively after two ends as power input, in afterbody basic element circuit, arbitrary electric capacity two ends are as power output end.
The quantity of such as basic element circuit is R, along with the change of lateral capacitance number N more in every one-level basic element circuit, the voltage of afterbody basic element circuit power output end is the product of the step-down no-load voltage ratio of R level basic element circuit, can realize the no-load voltage ratio of closing arbitrarily number thus.
The input of converter is electrically connected with the 50Hz city of 220V, and output is connected with load.
Each power switch pipe in power switch group provides pwm signal to drive by drive circuit, and drive circuit is connected with the grid of each power switch pipe.
As shown in Figure 2, for basic element circuit: the first power switch group S
1comprise the power switch pipe M that source electrode is connected mutually
1with power switch pipe M
2, the second power switch group S
2comprise the power switch pipe M that source electrode is connected mutually
3with power switch pipe M
4, the 3rd power switch group S
3comprise the power switch pipe M that source electrode is connected mutually
5with power switch pipe M
6, by that analogy, 2N power switch group S
2Ncomprise the power switch pipe M that source electrode is connected mutually
4N-1with power switch pipe M
4N.
As shown in Figure 2,2N-1 electric capacity is respectively electric capacity C
1, electric capacity C
2electric capacity C
2N-1.
As shown in Figure 2, the electric capacity C in basic element circuit
1be connected in parallel on the first power switch group S
1with the second power switch group S
2two ends after series connection, electric capacity C
2be connected in parallel on the two ends after the second power switch group and the series connection of the 3rd power switch group, electric capacity C
3be connected in parallel on the two ends after the 3rd power switch group and the series connection of the 4th power switch group, by that analogy, electric capacity C
2N-2be connected in parallel on 2N-2 power switch group S
2N-2with 2N-1 power switch group S
2N-1two ends after series connection, electric capacity C
2N-1be connected in parallel on 2N-1 power switch group S
2N-1with 2N power switch group S
2Ntwo ends after series connection;
As shown in Figure 1, the general principle of every one-level basic element circuit is substantially identical with structure, just to realize the electric capacity number contained by basic element circuit of input and output 1/N no-load voltage ratio different with power switch group number for every one-level, and corresponding change also occurs the no-load voltage ratio of every one-level basic element circuit output.
As shown in Figure 1,2N-1 electric capacity (i.e. electric capacity C is contained in first order basic element circuit
1, electric capacity C
2electric capacity C
2N-1), 2N group power switch group (S
1, S
2.。。s
2N); Each group power switch group comprises two power switch pipes, the first power switch group S
1comprise the power switch pipe M that source electrode is connected mutually
1with power switch pipe M
2, the second power switch group S
2comprise the power switch pipe M that source electrode is connected mutually
3with power switch pipe M
4, the 3rd power switch group S
3comprise the power switch pipe M that source electrode is connected mutually
5with power switch pipe M
6, by that analogy, 2N power switch group S
2Ncomprise the power switch pipe M that source electrode is connected mutually
4N-1with power switch pipe M
4N; The no-load voltage ratio of the 1/N of input and output voltage can be realized; 2P-1 electric capacity (i.e. electric capacity C is contained in the basic element circuit of the second level
1, electric capacity C
2electric capacity C
2P-1), 2P group power switch group (S
1, S
2.。。s
2P); Each group power switch group comprises two power switch pipes, the first power switch group S
1comprise the power switch pipe M that source electrode is connected mutually
1with power switch pipe M
2, the second power switch group S
2comprise the power switch pipe M that source electrode is connected mutually
3with power switch pipe M
4, the 3rd power switch group S
3comprise the power switch pipe M that source electrode is connected mutually
5with power switch pipe M
6, by that analogy, 2P power switch group S
2Pcomprise the power switch pipe M that source electrode is connected mutually
4P-1with power switch pipe M
4P; The no-load voltage ratio of the 1/P of input and output voltage can be realized; By that analogy, 2Q-1 electric capacity (i.e. electric capacity C is contained in R level basic element circuit
1, electric capacity C
2electric capacity C
2Q-1), 2Q group power switch group (S
1, S
2.。。s
2Q); Each group power switch group comprises two power switch pipes, the first power switch group S
1comprise the power switch pipe M that source electrode is connected mutually
1with power switch pipe M
2, the second power switch group S
2comprise the power switch pipe M that source electrode is connected mutually
3with power switch pipe M
4, the 3rd power switch group S
3comprise the power switch pipe M that source electrode is connected mutually
5with power switch pipe M
6, by that analogy, 2Q power switch group S
2Qcomprise the power switch pipe M that source electrode is connected mutually
4Q-1with power switch pipe M
4Q; The no-load voltage ratio of the 1/Q of input and output voltage can be realized;
The present invention is made up of the cascade of R level basic element circuit, along with the change of basic element circuit progression, the output no-load voltage ratio of this switching capacity type AC-AC converter also changes thereupon, step pressure reducing is realized successively by the increase of progression, the voltage of afterbody basic element circuit power output end and the no-load voltage ratio of power input voltage are the product of the step-down no-load voltage ratio of R level basic element circuit, obtain input and output voltage thus and close arbitrarily number no-load voltage ratio.Whenever the input input voltage u of secondary basic element circuit
ibe connected to all power switch groups of previous stage basic element circuit connect successively after two ends, now output is connected to arbitrary electric capacity two ends in secondary basic element circuit, if more lateral capacitance number is N in this grade of basic element circuit, then can obtain the output voltage u after converting
ofor input terminal voltage u
i1/N; If next stage basic element circuit is linked into arbitrary electric capacity two ends in secondary basic element circuit again, now output is connected to arbitrary electric capacity two ends in this basic element circuit, if more lateral capacitance number is P in this next stage basic element circuit, the output voltage u after converting can be obtained
ofor input terminal voltage u
i1/(NP); By that analogy, if R level basic element circuit is linked into arbitrary electric capacity two ends in R-1 level basic element circuit, now output is connected to arbitrary electric capacity two ends in R level basic element circuit, if more lateral capacitance number is Q in this R level basic element circuit, the output voltage u after converting can be obtained
ofor input terminal voltage u
i1/ (NP ... Q); By the access structure of basic element circuit and the change of progression, realize step pressure reducing, control to select the change level of the different no-load voltage ratio of output voltage with this.
Each group basic element circuit is after being linked into input, and the equivalent electric circuit of basic element circuit is made up of equivalent resistance and equivalent capacity.The concrete numerical value of its equivalent resistance and equivalent capacity, can change along with the design parameter of selected power switch pipe and electric capacity, but the power loss that the numerical value of equivalent resistance and equivalent capacity and every grade of basic element circuit produce all is far smaller than the traditional Switching Power Supply AC-AC converter containing magnetic element.Do not contain magnetic element in every grade of basic element circuit, be only made up of electric capacity and power switch pipe, compared with traditional Switching Power Supply, volume reduces greatly, and weight alleviates greatly, improves power density simultaneously.
Because the equivalent electric circuit of basic element circuit is made up of equivalent resistance and equivalent capacity, and the value of equivalent capacity is far smaller than when secondary basic element circuit is linked into arbitrary electric capacity two ends of three electric capacity of prime basic element circuit, now the voltage (being the input voltage of secondary basic element circuit) at prime arbitrary electric capacity two ends is designated as u
ibecause arbitrary electric capacity of prime is all in the continual process completing discharge and recharge, desirable voltage source can be regarded as, therefore be mutually isolated and interference-free between the dividing potential drop process of secondary basic element circuit and the basic element circuit of front stage, through the dividing potential drop process of every one-level basic element circuit, the impartial dividing potential drop of desirable 1/N no-load voltage ratio can be obtained.Voltage due to arbitrary electric capacity two ends of 2N-1 electric capacity of each prime basic element circuit is all considered as the desirable voltage source of secondary basic element circuit, therefore cascade connection type can realize the equivalent capacity of the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio and equivalent resistance determines by first order basic element circuit, along with the equivalent capacity of the increase converter of the present invention of basic element circuit progression in circuit and equivalent resistance also can not change.
Electric capacity C in the basic element circuit of input and output 1/N no-load voltage ratio is realized at every grade
2guarantee electric capacity C
1with electric capacity C
3the balance of voltage at two ends, electric capacity C
4guarantee electric capacity C
3with electric capacity C
5the balance of voltage at two ends, by that analogy, electric capacity C
2N-2guarantee electric capacity C
2N-3with electric capacity C
2N-1the balance of voltage at two ends.In whole voltage cycle, every grade of voltage realizing each electric capacity two ends in the basic element circuit of input and output 1/N no-load voltage ratio all equals the 1/N of this grade of basic element circuit input voltage.
Drive circuit provides the pwm signal driving each power switch pipe, controls conducting and the shutoff of power switch pipe, makes circuit working in different states.Conducting voltage due to general power switch pipe is 15V-20V, first the integrated pwm chip of such as SG3525 is adopted to produce pwm signal, by the voltage amplification that integrated pwm chip produces by simple drive circuit, to reach the conducting voltage of general power switch pipe, to reach the control to power switch pipe conducting and closedown.As shown in Figure 3, wherein (namely the switch periods 0 of power switch pipe is set to T to the pwm signal that integrated pwm chip produces the pwm signal cycle
s, signal dutyfactor is D.In one-period, work as DT
sduring for positive half period signal, (1-D) is negative half-cycle signal, and two half periods hocket.The variable stage switching capacity type AC-AC converter of any non-prime no-load voltage ratio can be realized for this cascade connection type, be described for any one-level basic element circuit, work as DT
sduring for pwm signal positive half period signal, suppose power switch group S
1, S
3s
2n-3, S
2n-1carry out conducting control, now to power switch group S
2, S
4s
2n-2, S
2ncarry out closing control.As (1-D) T
sduring for positive half period signal, suppose power switch group S
1, S
3s
2n-3, S
2n-1carry out conducting control, now to power switch group S
2, S
4s
2n-2, S
2ncarry out closing control.In order to ensure in circuit and circuit voltage stabilization on an electric capacity and balance, the duty ratio usually adopted is 0.5.
Therefore, when drive circuit provides pwm signal to drive, for any one-level basic element circuit, in a switch periods, converter has two kinds of specific works states, and for input voltage positive half period, operating state is described below:
First state: the first power switch group S
1, the 3rd power switch group S
3.。。to 2N-1 power switch group S
2N-1this N group power switch group closes, the second power switch group S
2, the 4th power switch group S
4.。。to 2N power switch group S
2Nthis N group power switch group disconnects;
In this state, electric capacity C
2charging, electric capacity C
4electric discharge, electric capacity C
6charging, electric capacity C
8electric discharge ... by that analogy.First, electric capacity C
1, electric capacity C
5, electric capacity C
9deng capacitor discharge, electric capacity C
3, electric capacity C
7, electric capacity C
11deng capacitor charging, until electric current is reduced to zero.Electric capacity C
1, electric capacity C
5, electric capacity C
9charging, electric capacity C is started Deng electric capacity
3, electric capacity C
7, electric capacity C
11electric discharge is started until this state terminates Deng electric capacity.In this whole state procedure, electric capacity C
2charging, electric capacity C
4electric discharge, electric capacity C
6charging, electric capacity C
8electric discharge ... by that analogy.Electric energy is by input voltage u
ibe transferred to circuit.At the end of this state, the first power switch group S
1, the 3rd power switch group S
3.。。to 2N-1 power switch group S
2N-1this N group power switch group disconnects, the second power switch group S
2, the 4th power switch group S
4.。。to 2N power switch group S
2Nthis N group power switch group closes.
Second state: the first power switch group S
1, the 3rd power switch group S
3.。。to 2N-1 power switch group S
2N-1this N group power switch group disconnects, the second power switch group S
2, the 4th power switch group S
4.。。to 2N power switch group S
2Nthis N group power switch group closes.First, circuit by delivery of electrical energy to input voltage u
i, electric capacity C
2electric discharge, electric capacity C
4charging, electric capacity C
6electric discharge, electric capacity C
8charging ... by that analogy.Electric capacity C
1, electric capacity C
5, electric capacity C
9deng capacitor charging, electric capacity C
3, electric capacity C
7, electric capacity C
11deng capacitor discharge, until electric current is reduced to zero, now electric energy is by input voltage u
ibe transferred to circuit.Electric capacity C
1, electric capacity C
5, electric capacity C
9electric discharge, electric capacity C is started Deng electric capacity
3, electric capacity C
7, electric capacity C
11charging is started until this state terminates Deng electric capacity.In this whole state procedure, electric capacity C
2electric discharge, electric capacity C
4charging, electric capacity C
6electric discharge, electric capacity C
8charging ... by that analogy.At the end of this state, the first power switch group S
1, the 3rd power switch group S
3.。。to 2N-1 power switch group S
2N-1this N group power switch group closes, the second power switch group S
2, the 4th power switch group S
4.。。to 2N power switch group S
2Nthis N group power switch group disconnects.
After second state terminates, new switch periods is from the first state.
At the negative half-cycle of input voltage, converter has similar operating state, and just sense of current is contrary.
Every one-level basic element circuit has identical operating state, and the drive singal of every one-level basic element circuit is also separate.
In whole operating state, the operating frequency of each power switch pipe is 100KHz.
Embodiment 1
As shown in Figure 4, be the circuit topological structure that can realize 1/6 no-load voltage ratio, this circuit topology is made up of two-stage basic element circuit.First order basic element circuit comprises 3 electric capacity and 4 groups of power switch groups of connecting successively, two ends after the input of input voltage is connected to 4 groups of power switch groups series connection, the output voltage at the two ends of arbitrary electric capacity in first order elementary cell, all can obtain the no-load voltage ratio of 1/2 of input voltage.Second level basic element circuit comprises 5 electric capacity and 6 groups of power switch groups of connecting successively, two ends after the input of input voltage is connected to 6 groups of power switch groups series connection, the output voltage at the two ends of arbitrary electric capacity in the elementary cell of the second level, all can obtain the no-load voltage ratio of 1/3 of input voltage.Second level basic element circuit is connected to the two ends of arbitrary electric capacity in first order basic element circuit in the mode of cascade, the voltage of second level basic element circuit power output end and the no-load voltage ratio of power input voltage are the product of the step-down no-load voltage ratio of two-stage basic element circuit, be no-load voltage ratio 1/6, form the AC-AC converter realizing 1/6 no-load voltage ratio thus.As shown in Figure 6, be input voltage u
ibe electrically connected with the 50Hz city of 220V, be linked into one-level basic element circuit, output voltage u
obe linked into the voltage at arbitrary electric capacity two ends in the elementary cell of the second level, by input voltage u
iwith output voltage u
oafter carrying out three dividing potential drops, realize the experimental result of 1/6 no-load voltage ratio.
Embodiment 2
As shown in Figure 5, be the circuit topological structure that can realize 1/12 no-load voltage ratio, this circuit topology is made up of three grades of basic element circuits.First order basic element circuit comprises 3 electric capacity and 4 groups of power switch groups of connecting successively, two ends after the input of input voltage is connected to 4 groups of power switch groups series connection, the output voltage at the two ends of arbitrary electric capacity in first order elementary cell, all can obtain the no-load voltage ratio of 1/2 of input voltage.Second level basic element circuit comprises 3 electric capacity and 4 groups of power switch groups of connecting successively, two ends after the input of input voltage is connected to 4 groups of power switch groups series connection, the output voltage at the two ends of arbitrary electric capacity in first order elementary cell, all can obtain the no-load voltage ratio of 1/2 of input voltage.Third level basic element circuit comprises 5 electric capacity and 6 groups of power switch groups of connecting successively, two ends after the input of input voltage is connected to 6 groups of power switch groups series connection, the output voltage at the two ends of arbitrary electric capacity in the elementary cell of the second level, all can obtain the no-load voltage ratio of 1/3 of input voltage.Second level basic element circuit is connected to the two ends of arbitrary electric capacity in first order basic element circuit in the mode of cascade, third level basic element circuit is connected to the two ends of arbitrary electric capacity in the basic element circuit of the second level in the mode of cascade, the voltage of third level basic element circuit power output end and the no-load voltage ratio of power input voltage are the product of the step-down no-load voltage ratio of three grades of basic element circuits, be no-load voltage ratio 1/12, form the AC-AC converter realizing 1/12 no-load voltage ratio thus.As shown in Figure 7, be input voltage u
ibe electrically connected with the 50Hz city of 220V, be linked into one-level basic element circuit, output voltage u
obe linked into the voltage at arbitrary electric capacity two ends in third level elementary cell, by input voltage u
iwith output voltage u
oafter carrying out three dividing potential drops, realize the experimental result of 1/12 no-load voltage ratio.
In sum, the present invention is only using electric capacity as energy-storage travelling wave tube, drive singal controls conducting and the shutoff of power switch pipe, thus the discharge and recharge time of control capacitance, by the change of more lateral capacitance number N in the progression of basic element circuit in control circuit structure and every one-level basic element circuit, step pressure reducing is realized by cascade, thus achieve the no-load voltage ratio that variable stage switching capacity type AC-AC converter closes arbitrarily number, reduce the volume of converter simultaneously, improve the power density of converter, equivalent internal resistance is little and substantially do not change along with the increase of basic element circuit progression.
Thus, the present invention proposes the new approaches of basic element circuit cascade, by basic element circuit cascade, broken original intrinsic thinking longitudinally expanded by AC-AC converter, there is great novelty and researching value, there is outstanding significant technique effect.
above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection range of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (6)
1. a cascade connection type realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio, its architectural feature is: form primarily of multiple basic element circuit successively cascade, the power switch group that basic element circuit is connected successively by electric capacity and many groups forms, often group power switch group comprises the power switch pipe that two source electrodes are connected mutually, two ends after arbitrary neighborhood two power switch group series connection are all parallel with an electric capacity, and drive circuit is connected with the grid of each power switch pipe; Cascade system is parallel to any electric capacity two ends in upper level basic element circuit for rear two ends of being connected by power switch groups all in secondary one-level basic element circuit, forms described switching capacity type AC-AC converter thus.
2. a kind of cascade connection type according to claim 1 realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio, it is characterized in that: in described first order basic element circuit all power switch groups connect successively after two ends as power input, in afterbody basic element circuit, arbitrary electric capacity two ends are as power output end.
3. a kind of cascade connection type according to claim 1 realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio, it is characterized in that: in described basic element circuits at different levels, the quantity of electric capacity is identical with the group number of power switch group.
4. a kind of cascade connection type according to claim 1 realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio, it is characterized in that: in described basic element circuits at different levels, the quantity of electric capacity is not identical with the group number of power switch group.
5. a kind of cascade connection type according to claim 1 realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio, it is characterized in that: the input of described converter is electrically connected with the 50Hz city of 220V, and output is connected with load.
6. a kind of cascade connection type according to claim 1 realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio, it is characterized in that: each power switch pipe in described power switch group provides pwm signal to drive by drive circuit, and drive circuit is connected with the grid of each power switch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510200082.9A CN104779809A (en) | 2015-04-26 | 2015-04-26 | Cascading type switched capacitor type AC-AC converter for achieving any composite number transformation ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510200082.9A CN104779809A (en) | 2015-04-26 | 2015-04-26 | Cascading type switched capacitor type AC-AC converter for achieving any composite number transformation ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104779809A true CN104779809A (en) | 2015-07-15 |
Family
ID=53621099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510200082.9A Pending CN104779809A (en) | 2015-04-26 | 2015-04-26 | Cascading type switched capacitor type AC-AC converter for achieving any composite number transformation ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104779809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092513A (en) * | 2017-12-26 | 2018-05-29 | 矽力杰半导体技术(杭州)有限公司 | DC-to-DC converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090322304A1 (en) * | 2008-06-30 | 2009-12-31 | Oraw Bradley S | Series and parallel hybrid switched capacitor networks for ic power delivery |
| CN103580501A (en) * | 2013-11-08 | 2014-02-12 | 中国计量学院 | Switched switch capacitor type AC-AC converter with fixed transformation ratio of 1/4 or 4 |
| US20140239719A1 (en) * | 2011-12-09 | 2014-08-28 | Intel Corporation | Switched capacitor based multiple output fixed ratio converter |
| CN204538977U (en) * | 2015-04-26 | 2015-08-05 | 中国计量学院 | Cascade connection type realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio |
-
2015
- 2015-04-26 CN CN201510200082.9A patent/CN104779809A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090322304A1 (en) * | 2008-06-30 | 2009-12-31 | Oraw Bradley S | Series and parallel hybrid switched capacitor networks for ic power delivery |
| US20140239719A1 (en) * | 2011-12-09 | 2014-08-28 | Intel Corporation | Switched capacitor based multiple output fixed ratio converter |
| CN103580501A (en) * | 2013-11-08 | 2014-02-12 | 中国计量学院 | Switched switch capacitor type AC-AC converter with fixed transformation ratio of 1/4 or 4 |
| CN204538977U (en) * | 2015-04-26 | 2015-08-05 | 中国计量学院 | Cascade connection type realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio |
Non-Patent Citations (1)
| Title |
|---|
| 王忠阁: "开关电容AC-AC变换器研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092513A (en) * | 2017-12-26 | 2018-05-29 | 矽力杰半导体技术(杭州)有限公司 | DC-to-DC converter |
| CN108092513B (en) * | 2017-12-26 | 2020-03-06 | 矽力杰半导体技术(杭州)有限公司 | DC-DC converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102510215B (en) | Three-level bidirectional direct-current converter and pulse width control method thereof | |
| CN102769377B (en) | Non-isolated variable flow topological structure based on phase shift control and application thereof | |
| CN102130611A (en) | Power electronic rectification transformer | |
| CN103166495A (en) | Single phase asymmetrical full-bridge non-isolated photovoltaic grid-connected inverter | |
| CN103580501B (en) | The diverter switch capacitor type AC-AC converter of fixing no-load voltage ratio 1/4 or 4 | |
| CN105958816A (en) | Multi-unit diode capacitor network and coupling inductor high-gain DC converter | |
| CN102882410B (en) | A kind of single-phase seven electrical level inverters | |
| CN103312178A (en) | Bi-directional DC/DC (direct current/direct current) converter and battery testing device applied with same | |
| CN105939126A (en) | Switch inductor type hybrid quasi-Z-source inverter | |
| CN204538976U (en) | Realize 1/2 nthe variable stage switching capacity type AC-AC converter of no-load voltage ratio | |
| CN103259402A (en) | Switched capacitor voltage-multiplying type direct current source based on symmetrical structure | |
| CN104779811A (en) | Cascading type switched capacitor type AC-AC converter for achieving any depressurization transformation ratio | |
| CN104779808A (en) | Variable switch capacitive type AC-AC convertor achieving 1/2 n no-load voltage ratio | |
| CN204179950U (en) | A kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter | |
| CN204538977U (en) | Cascade connection type realizes the switching capacity type AC-AC converter closing arbitrarily number no-load voltage ratio | |
| CN204538982U (en) | Cascade connection type realizes the switching capacity type AC-AC converter of any step-down no-load voltage ratio | |
| CN204538975U (en) | Realize the switching capacity type AC-AC converter of 1/N and derivative no-load voltage ratio thereof | |
| CN109450279B (en) | DC bus capacitor pre-charging method for three-stage AC/DC power electronic transformer | |
| CN203554295U (en) | Three-port series resonant converter | |
| CN104779809A (en) | Cascading type switched capacitor type AC-AC converter for achieving any composite number transformation ratio | |
| CN107404233B (en) | Direct current transmission system | |
| CN106712504B (en) | Non-isolated high-gain DC/DC converter with soft switch | |
| CN110635683B (en) | Two-port sub-module, self-coupling type direct current transformer and modulation method thereof | |
| CN104167944A (en) | High-power medium-frequency power supply device | |
| CN203859551U (en) | Z-source energy-storage AC controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150715 |