CN204179950U - A kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter - Google Patents
A kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter Download PDFInfo
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- CN204179950U CN204179950U CN201420697150.8U CN201420697150U CN204179950U CN 204179950 U CN204179950 U CN 204179950U CN 201420697150 U CN201420697150 U CN 201420697150U CN 204179950 U CN204179950 U CN 204179950U
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- power switch
- electric capacity
- switch group
- converter
- load voltage
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Abstract
The utility model discloses a kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter.The six groups of power switch groups comprising five electric capacity and connect successively, often group power switch group comprises the power switch pipe that two source electrodes are connected mutually; Two ends after two adjacent power switch group series connection are all connected with electric capacity; Drive circuit is connected with the grid of each power switch pipe.When buck converter, input is connected to the two ends of six groups of power switch groups, and output is connected to the two ends of arbitrary electric capacity; When booster converter, input is connected to the two ends of arbitrary electric capacity, and output is connected to the two ends of eight groups of power switch groups.The utility model, only using electric capacity as energy-storage travelling wave tube, not containing magnetic element, realizes the multiple no-load voltage ratios such as input and output 1/2,3/2,1/3 and 2/3, reduces the volume of converter, have the advantages that equivalent internal resistance is little, power density is high; And have that volume is little, lightweight, power-efficient advantages of higher.
Description
Technical field
The utility model relate to a kind of AC-AC converter, especially relates to a kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter.
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, the purpose of this utility model is to provide a kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter, devise structure simple, control new type electronic transformers easy, with low cost to replace traditional transformer.
The technical solution adopted in the utility model is:
The six groups of power switch groups comprising five electric capacity and connect successively, often group power switch group comprises the power switch pipe that two source electrodes are connected mutually;
Six groups of power switch groups respectively are the first power switch group, the second power switch group, the 3rd power switch group, the 4th power switch group, the 5th power switch group and the 6th power switch group; Five electric capacity are respectively the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th 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 3rd power switch group and the series connection of the 4th power switch group, the two ends of 3rd Capacitance parallel connection after the 5th power switch group and the series connection of the 6th power switch group, the two ends of 4th Capacitance parallel connection after the second power switch group and the series connection of the 3rd power switch group, the two ends of the 5th Capacitance parallel connection after the 4th power switch group and the series connection of the 5th power switch group.
When described converter is no-load voltage ratio 1/2 decompression transformation, input is connected to the two ends after the 4th electric capacity and the 5th capacitances in series, and output is connected to the two ends of any one electric capacity in the first electric capacity, the second electric capacity and the 3rd electric capacity; When described converter is no-load voltage ratio 3/2 boosting inverter, input is connected to the two ends after the 4th electric capacity and the 5th capacitances in series, and output is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series; When described converter is no-load voltage ratio 1/3 decompression transformation, input is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series, and output is connected to the two ends of any one electric capacity in the 4th electric capacity and the 5th electric capacity; When described converter is no-load voltage ratio 2/3 decompression transformation, input is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series, and output is connected to the two ends after the 4th electric capacity and the 5th capacitances in series.
The input of described converter is electrically connected with the 50Hz city of 220V, and output is connected with load resistance.
Each power switch pipe in six groups of described power switch groups provides pwm signal to drive by drive circuit, and drive circuit is connected with the grid of each power switch pipe.
The utility model adopts technique scheme, has following beneficial effect:
The utility model 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, achieve the multiple no-load voltage ratios such as input and output 1/2,3/2,1/3 and 2/3, reduce volume and the weight of converter, improve power density, equivalent internal resistance alleviates.
The utility model due to not containing magnetic element, therefore has that volume is little, lightweight, power-efficient advantages of higher.
Accompanying drawing explanation
Fig. 1 is the utility model to be this transformer output-input voltage no-load voltage ratio be 1/2 circuit topology figure.
Fig. 2 is the utility model to be this transformer output-input voltage no-load voltage ratio be 3/2 circuit topology figure.
Fig. 3 is the utility model when being transformer, and output-input voltage no-load voltage ratio is the circuit topology figure of 1/3.
Fig. 4 is the utility model when being transformer, and output-input voltage no-load voltage ratio is the circuit topology figure of 2/3.
Fig. 5 is that in the utility model, power switch pipe receives the pwm signal oscillogram driven.
In figure: u
i, input voltage, R
l, load resistance, u
o, output voltage, the duty ratio of D, pwm signal, T
s, the pwm signal cycle.
Embodiment
Be described in detail below in conjunction with the technical scheme of accompanying drawing to utility model.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the six groups of power switch groups comprising five electric capacity and connect successively, often group power switch group comprises the power switch pipe that two source electrodes are connected mutually; Six groups of power switch groups respectively are the first power switch group, the second power switch group, the 3rd power switch group, the 4th power switch group, the 5th power switch group and the 6th power switch group; Five electric capacity are respectively the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity.
As shown in Figure 1 to 4, six groups of power switch groups: 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, the 4th power switch group S
4comprise the power switch pipe M that source electrode is connected mutually
7with power switch pipe M
8, the 5th power switch group S
5comprise the power switch pipe M that source electrode is connected mutually
9with power switch pipe M
10, the 6th power switch group S
6comprise the power switch pipe M that source electrode is connected mutually
11with power switch pipe M
12.And as shown in Figure 1 to 4, five electric capacity are respectively the first electric capacity C
1, the second electric capacity C
2, the 3rd electric capacity C
3, the 4th electric capacity C
4with the 5th electric capacity C
5.
First electric capacity C
1be connected in parallel on the two ends after the first power switch group and the series connection of the second power switch group, the second electric capacity C
2be connected in parallel on the two ends after the 3rd power switch group and the series connection of the 4th power switch group, the 3rd electric capacity C
3be connected in parallel on the two ends after the 5th power switch group and the series connection of the 6th power switch group, the 4th electric capacity C
4be connected in parallel on the two ends after the second power switch group and the series connection of the 3rd power switch group, the 5th electric capacity C
5be connected in parallel on the two ends after the 4th power switch group and the series connection of the 5th power switch group.
Five electric capacity are respectively in the both sides of circuit structure, and 3 electric capacity such as the first electric capacity, the second electric capacity, the 3rd electric capacity are in side, and these 2 electric capacity of the 4th electric capacity, the 5th electric capacity at opposite side, therefore claim this circuit structure to be 2-3 type.
As shown in Figure 1, when described converter is no-load voltage ratio 1/2 decompression transformation, input is connected to the two ends after the 4th electric capacity and the 5th capacitances in series, and output is connected to the two ends of any one electric capacity in the first electric capacity, the second electric capacity and the 3rd electric capacity; In circuit, the voltage at each electric capacity two ends equals input voltage u
i1/2, and not containing DC component, the output voltage u after conversion
ofor input voltage u
i1/2, fixed voltage no-load voltage ratio 1/2 can be realized.
As Fig. 2 shows, when described converter is no-load voltage ratio 3/2 boosting inverter, input is connected to the two ends after the 4th electric capacity and the 5th capacitances in series, and output is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series; In circuit, the voltage at each electric capacity two ends equals input voltage u
i1/2, and not containing DC component, the output voltage u after conversion
ofor input voltage u
i3/2, fixed voltage no-load voltage ratio 3/2 can be realized.
As shown in Figure 3, when described converter is no-load voltage ratio 1/3 decompression transformation, input is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series, and output is connected to the two ends of any one electric capacity in the 4th electric capacity and the 5th electric capacity; In circuit, the voltage at each electric capacity two ends equals input voltage u
i1/3, and not containing DC component, the output voltage u after conversion
ofor input voltage u
i1/3, fixed voltage no-load voltage ratio 1/3 can be realized.
As shown in Figure 4, when described converter is no-load voltage ratio 2/3 decompression transformation, input is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series, and output is connected to the two ends after the 4th electric capacity and the 5th capacitances in series; In circuit, the voltage at each electric capacity two ends equals input voltage u
i1/3, and not containing DC component, the output voltage u after conversion
ofor input voltage u
i2/3, fixed voltage no-load voltage ratio 2/3 can be realized.
The input of converter is electrically connected with the 50Hz city of 220V, and output is connected with load resistance.
Each power switch pipe in six groups of power switch groups provides pwm signal to drive by drive circuit, and drive circuit is connected with the grid of each power switch pipe.
Not containing magnetic element in circuit of the present utility model, 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, and equivalent internal resistance alleviates greatly.Wherein, electric capacity C
4guarantee electric capacity C
1with electric capacity C
2the balance of voltage at two ends, electric capacity C
5guarantee electric capacity C
2with electric capacity C
3the balance of voltage at two ends.
Drive circuit provides the pwm signal driving each power switch pipe, as shown in Figure 5, 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, the integrated pwm chip of such as SG3525 can be first 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 5, 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.Work as DT
sduring for pwm signal positive half period signal, suppose power switch group S
1, S
3, S
5carry out conducting control, now to power switch group S
2, S
4, S
6carry out closing control.As (1-D) T
sduring for positive half period signal, suppose power switch group S
1, S
3, S
5carry out closing control, now to power switch group S
2, S
4, S
6carry out conducting 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, 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
3with the 5th power switch group S
5closed, the second power switch group S
2, the 4th power switch group S
4with the 6th power switch group S
6disconnect.
In this state, electric capacity C
4charging, electric capacity C
5electric discharge.First, electric capacity C
1with electric capacity C
3electric discharge, electric capacity C
2charging, until electric current is reduced to zero.Electric capacity C
1with electric capacity C
3start charging, electric capacity C
2start electric discharge until this state terminates.In this whole state procedure, electric capacity C
4charging, electric capacity C
5electric discharge.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
3with the 5th power switch group S
5disconnect, the second power switch group S
2, the 4th power switch group S
4with the 6th power switch group S
6closed.
Second state: power switch group S
1, S
3, S
5disconnect, power switch group S
2, S
4, S
6closed.First, circuit by delivery of electrical energy to input voltage u
i, electric capacity C
4electric discharge, electric capacity C
5charging.Electric capacity C
1and C
3charging, electric capacity C
2electric discharge, until electric current is reduced to zero, now electric energy is by input voltage u
ibe transferred to circuit.Electric capacity C
1and C
3start electric discharge, electric capacity C
2start charging until this state terminates.In this whole state procedure, electric capacity C
4electric discharge, electric capacity C
5charging.At the end of this state, the first power switch group S
1, the 3rd power switch group S
3with the 5th power switch group S
5closed, the first power switch group S
1, the 3rd power switch group S
3with the 5th power switch group S
5disconnect.
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.
In whole operating state, the operating frequency of each power switch pipe is 100kHz.
As shown in Figure 3, Figure 4, by input and output transposition, the converter of circuit topological structure to be no-load voltage ratio be 1/3 and 2/3, can realize input and output voltage no-load voltage ratio is 1/3 and 2/3, can realize above-mentioned similar operating state equally.
In sum, the utility model 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, achieve the multiple no-load voltage ratios such as input and output 1/2,3/2,1/3 and 2/3, reduce the volume of converter, improve the power density of converter, reduce the equivalent internal resistance value of system, there is significant technique effect.
Above-mentioned embodiment is used for explaining and the utility model is described; instead of the utility model is limited; in the protection range of spirit of the present utility model and claim, any amendment make the utility model and change, all fall into protection range of the present utility model.
Claims (4)
1. a 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter, is characterized in that: the six groups of power switch groups comprising five electric capacity and connect successively, and often group power switch group comprises the power switch pipe that two source electrodes are connected mutually;
Six groups of power switch groups respectively are the first power switch group, the second power switch group, the 3rd power switch group, the 4th power switch group, the 5th power switch group and the 6th power switch group; Five electric capacity are respectively the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th 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 3rd power switch group and the series connection of the 4th power switch group, the two ends of 3rd Capacitance parallel connection after the 5th power switch group and the series connection of the 6th power switch group, the two ends of 4th Capacitance parallel connection after the second power switch group and the series connection of the 3rd power switch group, the two ends of the 5th Capacitance parallel connection after the 4th power switch group and the series connection of the 5th power switch group.
2. a kind of 2-3 type according to claim 1 multiple no-load voltage ratio switching capacity type AC-AC converter, it is characterized in that: when described converter is no-load voltage ratio 1/2 decompression transformation, input is connected to the two ends after the 4th electric capacity and the 5th capacitances in series, and output is connected to the two ends of any one electric capacity in the first electric capacity, the second electric capacity and the 3rd electric capacity;
When described converter is no-load voltage ratio 3/2 boosting inverter, input is connected to the two ends after the 4th electric capacity and the 5th capacitances in series, and output is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series;
When described converter is no-load voltage ratio 1/3 decompression transformation, input is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series, and output is connected to the two ends of any one electric capacity in the 4th electric capacity and the 5th electric capacity;
When described converter is no-load voltage ratio 2/3 decompression transformation, input is connected to the two ends after the first electric capacity, the second electric capacity and the 3rd capacitances in series, and output is connected to the two ends after the 4th electric capacity and the 5th capacitances in series.
3. a kind of 2-3 type according to claim 2 multiple no-load voltage ratio switching capacity type AC-AC converter, is characterized in that: the input of described converter is electrically connected with the 50Hz city of 220V, and output is connected with load resistance.
4. a kind of 2-3 type according to claim 1 multiple no-load voltage ratio switching capacity type AC-AC converter, it is characterized in that: each power switch pipe in six groups of described power switch groups 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 |
|---|---|---|---|
| CN201420697150.8U CN204179950U (en) | 2014-11-19 | 2014-11-19 | A kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420697150.8U CN204179950U (en) | 2014-11-19 | 2014-11-19 | A kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter |
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| Publication Number | Publication Date |
|---|---|
| CN204179950U true CN204179950U (en) | 2015-02-25 |
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ID=52568724
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420697150.8U Expired - Fee Related CN204179950U (en) | 2014-11-19 | 2014-11-19 | A kind of 2-3 type multiple no-load voltage ratio switching capacity type AC-AC converter |
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| CN (1) | CN204179950U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779811A (en) * | 2015-04-26 | 2015-07-15 | 中国计量学院 | Cascading type switched capacitor type AC-AC converter for achieving any depressurization transformation ratio |
| CN104852595A (en) * | 2015-05-31 | 2015-08-19 | 厦门大学 | Bridge modular multilevel switched capacitor AC-AC converter commutation method |
| CN112913131A (en) * | 2018-11-01 | 2021-06-04 | 株式会社村田制作所 | Switching converter |
-
2014
- 2014-11-19 CN CN201420697150.8U patent/CN204179950U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779811A (en) * | 2015-04-26 | 2015-07-15 | 中国计量学院 | Cascading type switched capacitor type AC-AC converter for achieving any depressurization transformation ratio |
| CN104852595A (en) * | 2015-05-31 | 2015-08-19 | 厦门大学 | Bridge modular multilevel switched capacitor AC-AC converter commutation method |
| CN112913131A (en) * | 2018-11-01 | 2021-06-04 | 株式会社村田制作所 | Switching converter |
| CN112913131B (en) * | 2018-11-01 | 2024-03-01 | 株式会社村田制作所 | Switching converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20171119 |