CN103078525A - Alternative-current direct-current (AC-DC) converter based on exchange link technology - Google Patents
Alternative-current direct-current (AC-DC) converter based on exchange link technology Download PDFInfo
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- CN103078525A CN103078525A CN2013100124601A CN201310012460A CN103078525A CN 103078525 A CN103078525 A CN 103078525A CN 2013100124601 A CN2013100124601 A CN 2013100124601A CN 201310012460 A CN201310012460 A CN 201310012460A CN 103078525 A CN103078525 A CN 103078525A
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses an alternative-current direct-current (AC-DC) converter based on an exchange link technology, which belongs to the field of strong electricity. The AC-DC converter consists of a three-phase input filter, a switch matrix, a (LCC) serial-parallel resonance circuit, a high-frequency transformer and a high-frequency rectifier, wherein each column of the switch matrix is connected with each phase of the three-phase input filter, the LCC serial-parallel resonance circuit is connected with the output end of the switch matrix, the high-frequency transformer is connected with the output end of the LCC serial-parallel resonance circuit, and the high-frequency rectifier is used for rectifying the boosted voltage. Through the structure, the defects in the prior art that the AC-DC converter has multiple elements and devices, the power density is reduced, and harmonic component is large because of the correction of a power factor caused by utilizing a passive filter can be overcome, not only is the size small, but also the power density of a power supply is high, the environmental influence on the electric network is small because the harmonic component is low, the power supply efficiency of the entire electric network system is higher, and the AC-DC converter is suitable for being popularized to use.
Description
Technical field
The present invention relates to a kind of AC-DC converter, specifically, relate to a kind of AC-DC converter based on exchanging chained technology.
Background technology
Before 20 century 70s, the AC-DC converter mainly uses diode and two kinds of power electric components of thyristor, because diode is uncontrollable device, and thyristor is half controllable devices, therefore this AC-DC converter can only be operated under the power frequency condition, and bulky and heavy, can produce the transformer that low frequency noise pollutes, therefore this AC-DC convertor device power factor is excessively low, need passive filter to carry out power factor correction, this device produces low-order harmonic and fundamental frequency approaches, and pollute not only for load or electrical network, and the design of filter is also very difficult.
The eighties in 20th century occurred compound the controlled semiconductor device of the third generation take IGBT as representative, they turn on and off all can be by the control of the control utmost point, and operating frequency improves greatly.There is the converter of dc energy storage link (DC-Link) in the middle of the AC-DC conversion is mainly adopted, at first industrial frequency AC is rectified into direct current, then dc inversion is become the interchange of high frequency, and then be rectified into direct current.This topological structure can be operated under the high frequency condition, so that the volume and weight of energy converter reduces greatly, output harmonic wave is high order harmonic component, is easy to filtering, and the volume and weight of its filter reduces greatly, and efficient improves greatly.But, converter passive component based on the DC-Link technology is more, storage capacitor particularly, weight and volume accounts for the very large proportion of whole converter, reduce the power density of power supply, and in order to improve power factor, under high-power condition (15kW) to need to use passive filter to carry out the harmonic component that power factor correction produces so larger.
Summary of the invention
It is more to the object of the invention is to overcome AC-DC converter components and parts of the prior art, reduction power density and needs use passive filter carry out power factor correction and cause the larger defective of harmonic component, and a kind of AC-DC converter based on exchanging chained technology is provided.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of AC-DC converter based on exchanging chained technology, by the three-phase input filter, each is listed as each switch matrix that links to each other with the three-phase input filter, the LCC series parallel resonance circuit that links to each other with the switch matrix output, the high frequency transformer that links to each other with LCC series parallel resonance circuit output end and the hf rectifier composition that the voltage after boosting is carried out rectification, wherein M is positive integer.
In order to realize the filter function of three-phase input filter, described three-phase input filter comprises and is connected to the three-phase filter inductance that each is gone up mutually, one end links to each other with the output of an inductance in the three-phase filter inductance respectively and the other end is interconnected to form the three-phase filter capacitor of Y shape connected mode, and wherein each row of the output of three-phase filter inductance and switch matrix link to each other.
As a kind of preferred, described switch matrix is
Matrix has six switches, and wherein each lists the end that two switches link to each other on the output connecting valve matrix of each phase of three-phase filter inductance, and the other end of switch is in parallel with LCC series parallel resonance circuit.
Further, the switch in the described switch matrix is comprised of the semiconductor bidirectional switch.
Further, described LCC series parallel resonance circuit comprises capacitor C 2 and the capacitor C 3 of inductance and mutually series connection, wherein capacitor C 2 links to each other with an output of switch matrix, and inductance links to each other with another output of switch matrix, and high frequency transformer is in parallel with the output of capacitor C 3.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention includes three-phase input filter, switch matrix, LCC series parallel resonance circuit, high frequency transformer and the hf rectifier that connects successively, need not the devices such as storage capacitor, greatly reduced the volume of whole AC-DC converter.
(2) the present invention adopts
Switch matrix, link to each other to realize the two-way flow of energy with the three-phase input filter, direct current storage link in the middle of saving, so just, power density can have been improved, this also is the basic reason that reduces the devices such as storage capacitor, not only reduce volume, raise the efficiency, saved simultaneously cost, and this switch matrix can be realized according to the break-make of each switch the conversion of three-phase input phase voltage size, make line current linear with line voltage amplification and make phase preserving consistent, so just can guarantee simultaneously higher power factor and low harmonic wave, improve the power density of power supply, the environmental impact that brings to electrical network is little, makes whole network system power supplying efficiency higher.
(3) LCC series parallel resonance circuit structure of the present invention is simple, only needs two electric capacity and an inductance to realize, and by being boosted by high frequency transformer behind the resonance, can cooperate with LCC series parallel resonance circuit like this, low line voltage is worked first, work behind the high line voltage, efficient is very high.
Description of drawings
Fig. 1 is the schematic block circuit diagram among the present invention-embodiment.
Fig. 2 is the electrical symbol figure of semiconductor bidirectional switch among the present invention-embodiment.
Fig. 3 is resonance current oscillogram among the present invention-embodiment.
Fig. 4 is capacitive load voltage oscillogram among the present invention-embodiment.
Fig. 5 is switching current oscillogram among the present invention-embodiment.
Fig. 6 is three-phase alternating current phase voltage and line current oscillogram among the present invention-embodiment.
Fig. 7 is voltage and current THD figure among the present invention-embodiment.
Fig. 8 is power-factor measurement value figure among the present invention-embodiment.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment, and embodiments of the present invention include but not limited to the following example.
Embodiment
Fig. 1 is a specific embodiment among the present invention, and the AC-DC converter in the present embodiment comprises:
(A) three-phase input filter
This three-phase input filter comprises three filter capacitor C1 and three filter inductance L1, each filter inductance L1 connects and is connected on each phase input, the end of each filter capacitor C1 connects the wherein output of the filter inductance L1 of a phase, the other end of three filter capacitor C1 links together, Y-shaped connection.
L1=100 μ H wherein, C1=30 μ F.
(B) switch matrix
This switch matrix is comprised of switch, and as shown in Figure 2, this switch is the semiconductor bidirectional switch, and this switch matrix is
Matrix has 6 semiconductor bidirectional switchs of 2 row, 3 row, and each lists the end that two switches link to each other the output connecting valve matrix of each filter inductance.The effect of this switch matrix is the two-way flow that realizes energy, and calculates every mutually quantity of electric charge of output, and its amplitude with corresponding phase voltage is directly proportional.
This semiconductor bidirectional switch is two continuous IGBT, is respectively T1 and T2, can be learnt by Fig. 2, and the emitter of T1 and T2 interconnects, and forms two ends by the collector electrode of T1 and the collector electrode of T2 respectively, obtains a bidirectional switch.
(C) LCC series parallel resonance circuit
This series parallel resonance circuit comprises capacitor C 2, capacitor C 3 and inductance L 2, one end of capacitor C 2 links to each other with the switch of switch matrix the first row, one end of inductance L 2 links to each other with the switch of switch matrix the second row, capacitor C 3 is connected with the other end of capacitor C 2, every mutually quantity of electric charge of output is according to the numerical computations of this LCC series parallel resonance circuit resonance electric capacity and resonant inductance, therefore, adjust the driving voltage of resonant tank by switch matrix.
C2=30μF，C3=0.1uF，L2=100μH。
(D) high frequency transformer
The input of this high sheet transformer is in parallel with capacitor C 3, and the no-load voltage ratio of this high frequency transformer is 1:100, and output connects the load capacitor of a 2uF.
(E) hf rectifier
This hf rectifier is existing instrument, does not therefore do too much explanation.
The course of work of the present invention is as follows:
In each switch periods, by the control switch matrix, make the LCC series-parallel circuit connect different input phases, adopt instantaneous line voltage to synthesize modulation strategy, low line voltage is worked first, and namely phase voltage absolute value maximal phase is worked first mutually with phase voltage absolute value minimum, then high line voltage power supply, be to work afterwards mutually in the middle of the phase voltage absolute value maximal phase change of current phase voltage absolute value, determined by following strategy to the commutation time of the middle phase of phase voltage absolute value from the minimum phase change of current of phase voltage absolute value:
By gathering the instantaneous value of three-phase voltage and load voltage, and according to the numerical value of LCC series parallel resonance circuit resonance electric capacity and resonant inductance, calculates every mutually quantity of electric charge of output, it is directly proportional with corresponding amplitude of phase voltage.
Compared with prior art, adopt switch matrix, realize the two-way flow of energy, the direct current storage link in the middle of can saving realizes high power density; Adopt switch matrix and LCC series resonant circuit, can make switch under soft Switching Condition, reduce loss, realize high efficient; Size according to three-phase input phase voltage by the break-make of control switch matrix, makes line current amplitude and line voltage magnitude linear, and phase preserving is consistent, can realize high power factor and low harmonic wave, reduces the impact on electrical network and load.
Experimental result is respectively such as Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and shown in Figure 8.Fig. 3 is resonance current waveform and capacitive load voltage waveform, Fig. 4 is the capacitive load voltage waveform, Fig. 5 is switch change of current waveform, show that converter can realize Zero Current Switch and natural soft handover, Fig. 6 is three-phase input line current waveform and phase voltage waveform, line current can well be followed phase voltage, three-phase input line electric current is consistent with the phase voltage phase preserving, every phase voltage and electric current total harmonic distortion (THD) as shown in Figure 7, voltage THD is respectively 1.2%, 1.4% and 1.3%, corresponding electric current THD is 9.5%, 9.5% and 8.5%, Fig. 8 be the power-factor measurement value, mean value is 0.99 within the operating time.
According to above-described embodiment, just can realize well the present invention.
Claims (5)
1. one kind based on the AC-DC converter that exchanges chained technology, it is characterized in that, by the three-phase input filter, each of each row and three-phase input filter links to each other
Switch matrix, the LCC series parallel resonance circuit that links to each other with the switch matrix output, the high frequency transformer that links to each other with LCC series parallel resonance circuit output end and the hf rectifier that the voltage after boosting carries out rectification formed, wherein M is positive integer.
2. a kind of AC-DC converter based on exchanging chained technology according to claim 1, it is characterized in that, described three-phase input filter comprises and is connected to the three-phase filter inductance that each is gone up mutually, one end links to each other with the output of an inductance in the three-phase filter inductance respectively and the other end is interconnected to form the three-phase filter capacitor of Y shape connected mode, and wherein each row of the output of three-phase filter inductance and switch matrix link to each other.
3. a kind of AC-DC converter based on exchanging chained technology according to claim 2 is characterized in that, M=2, and described switch matrix is
Matrix has six switches, and wherein each lists the end that two switches link to each other on the output connecting valve matrix of each phase of three-phase filter inductance, and the other end of switch is in parallel with LCC series parallel resonance circuit.
4. a kind of AC-DC converter based on exchanging chained technology according to claim 3 is characterized in that the switch in the described switch matrix is comprised of the semiconductor bidirectional switch.
5. a kind of AC-DC converter based on exchanging chained technology according to claim 4, it is characterized in that, described LCC series parallel resonance circuit comprises capacitor C 2 and the capacitor C 3 of inductance and mutually series connection, wherein capacitor C 2 links to each other with an output of switch matrix, inductance links to each other with another output of switch matrix, and high frequency transformer is in parallel with capacitor C 3.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647461A (en) * | 2013-12-06 | 2014-03-19 | 西南交通大学 | Control method and apparatus of AC-DC series resonance matrix converter |
| CN103929072A (en) * | 2014-04-15 | 2014-07-16 | 西南交通大学 | Control method for AC-DC series resonance matrix converter |
| CN105553306A (en) * | 2016-01-19 | 2016-05-04 | 华中科技大学 | Inversion power supply device in hybrid conduction mode and direct charge control method of inversion power supply device |
| CN105932869A (en) * | 2015-12-16 | 2016-09-07 | 西南交通大学 | Control method of high-voltage power supply with high-power factor and high-power density |
| CN110286336A (en) * | 2019-07-04 | 2019-09-27 | 北京市速连科通信设备有限责任公司 | A kind of power detector |
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| JP2007124816A (en) * | 2005-10-28 | 2007-05-17 | Fuji Electric Fa Components & Systems Co Ltd | Controller for ac/ac power converter |
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| JP2007124816A (en) * | 2005-10-28 | 2007-05-17 | Fuji Electric Fa Components & Systems Co Ltd | Controller for ac/ac power converter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647461A (en) * | 2013-12-06 | 2014-03-19 | 西南交通大学 | Control method and apparatus of AC-DC series resonance matrix converter |
| CN103647461B (en) * | 2013-12-06 | 2016-04-13 | 西南交通大学 | A kind of control method of AC-DC series resonance matrix converter and device |
| CN103929072A (en) * | 2014-04-15 | 2014-07-16 | 西南交通大学 | Control method for AC-DC series resonance matrix converter |
| CN103929072B (en) * | 2014-04-15 | 2016-04-13 | 西南交通大学 | A kind of control method of AC-DC series resonance matrix converter |
| CN105932869A (en) * | 2015-12-16 | 2016-09-07 | 西南交通大学 | Control method of high-voltage power supply with high-power factor and high-power density |
| CN105553306A (en) * | 2016-01-19 | 2016-05-04 | 华中科技大学 | Inversion power supply device in hybrid conduction mode and direct charge control method of inversion power supply device |
| CN105553306B (en) * | 2016-01-19 | 2018-02-23 | 华中科技大学 | Mix the inverter power supply device of conduction mode and its direct electric charge amount control method |
| CN110286336A (en) * | 2019-07-04 | 2019-09-27 | 北京市速连科通信设备有限责任公司 | A kind of power detector |
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Application publication date: 20130501 |