CN205490225U - Two -way ACDC circuit of high -frequency chopper isolated form - Google Patents
Two -way ACDC circuit of high -frequency chopper isolated form Download PDFInfo
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- CN205490225U CN205490225U CN201620263283.3U CN201620263283U CN205490225U CN 205490225 U CN205490225 U CN 205490225U CN 201620263283 U CN201620263283 U CN 201620263283U CN 205490225 U CN205490225 U CN 205490225U
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- 230000002457 bidirectional effect Effects 0.000 claims description 15
- 230000010363 phase shift Effects 0.000 claims description 8
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Abstract
The utility model provides a two -way ACDC circuit of high -frequency chopper isolated form, include: filter reactor, PWM converter, the former limit H bridge arm of high -frequency transformer, high -frequency transformer, the vice limit of high -frequency transformer H bridge arm, wherein, filter reactor carries out filtering to the alternating current power supply of input, the PWM converter is the three -phase full -bridge circuit compriseed 6 switch tubes, through condenser filtering between the former limit H bridge arm of PWM converter and high -frequency transformer, the former limit H bridge arm of high -frequency transformer comprises four switch tubes, and the former limit of high -frequency transformer is connected to the bridge arm common point, the vice limit of high -frequency transformer H bridge arm comprises four switch tubes, and the vice limit of high -frequency transformer is connected to the bridge arm common point. The utility model discloses a two -way ACDC circuit of high -frequency chopper isolated form has reduced complete machine weight, has reduced the volume, has improved the power density of complete machine.
Description
Technical field
This utility model relates to field of power electronics, particularly to a kind of high frequency chopping isolation type bidirectional AC/DC circuit.
Background technology
Along with science and technology and the development of production, the demand of two-way AC/DC changer is gradually increased, mainly has the application scenarios such as the vehicle powers such as direct current uninterruptible power system, aviation power system, photovoltaic cell, electric automobile, ship-borne power source, batteries to store energy.This quasi-converter has high power density, high conversion efficiency, power energy two-way flow.
Fig. 1 show existing power frequency isolated form AC/DC changer, Industrial Frequency Transformer T10 is used to carry out voltage isolation, L10, L20, L30 are filter inductance, can realize being controlled or by the control of discharge of DC to AC by the charging of AC to DC by controlling the pulse of switching tube V10 ~ V60.
Existing power frequency isolated form AC/DC changer can realize to and fro flow of power, uses Industrial Frequency Transformer to carry out isolating and voltage transformation, and Industrial Frequency Transformer volume and weight is the biggest, and the power density causing equipment is low, and during Industrial Frequency Transformer work, noise is the biggest；The direct current output range of accommodation of AC/DC is narrow, because being BOOST mode of operation, when line voltage raises, the VD of AC/DC can not maintain reference value；From the point of view of from cost, Industrial Frequency Transformer uses the metal material processing such as copper aluminum to form, and cost is high.
Utility model content
For solving the deficiency of above-mentioned power frequency isolated form AC/DC changer, the utility model proposes a kind of high frequency chopping isolation type bidirectional AC/DC circuit.
The technical solution of the utility model is achieved in that
A kind of high frequency chopping isolation type bidirectional AC/DC circuit, including: filter reactor, PWM converter, high frequency transformer former limit H brachium pontis, high frequency transformer, high frequency transformer secondary H brachium pontis；
Wherein, the alternating current power supply of input is filtered by filter reactor；
PWM converter is the three phase full bridge circuit being made up of 6 switching tubes, passes through capacitor filtering between PWM converter and high frequency transformer former limit H brachium pontis；
High frequency transformer former limit H brachium pontis is made up of four switching tubes, and brachium pontis common point connects the former limit of high frequency transformer；
High frequency transformer secondary H brachium pontis is made up of four switching tubes, and brachium pontis common point connects high frequency transformer secondary.
Alternatively, 8 switching tubes of described high frequency transformer former limit H brachium pontis and high frequency transformer secondary H brachium pontis are IGBT, and each switching tube includes antiparallel equivalent diode.
Alternatively, when being operated in charging modes, high frequency transformer former limit H brachium pontis switching tube is operated under phase shift BUCK pattern, capacitor two ends DC current is transformed to high frequency electric, transform to secondary through high frequency transformer, then after the equivalent diode rectification of high frequency transformer secondary H brachium pontis switching tube, become DC current be sent to load-side.
Alternatively, when being operated in discharge mode, high frequency transformer secondary H brachium pontis switching tube is operated in phase shift BUCK pattern, it is high-frequency ac current by the DC current inversion of load-side, former limit is transferred the energy to through high frequency transformer, after the equivalent diode rectification of high frequency transformer former limit H brachium pontis switching tube, become DC current, then by PWM converter, energy foldback is returned AC network.
The beneficial effects of the utility model are:
(1) use of high frequency transformer, instead of traditional Industrial Frequency Transformer, reduces complete machine weight, reduces volume, improves the power density of complete machine, uses high-frequency isolation transformer, and under the conditions of Same Efficieney, volume is only the 20% of Industrial Frequency Transformer；
(2) high frequency phase shift BUCK technology is used, the wide ranges that the input voltage of AC/DC allows.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram of existing power frequency isolated form AC/DC changer；
Fig. 2 is the circuit diagram of this utility model a kind of high frequency chopping isolation type bidirectional AC/DC circuit；
Fig. 3 is the equivalent circuit diagram of this utility model a kind of high frequency chopping isolation type bidirectional AC/DC circuit charged state；
Fig. 4 is the equivalent circuit diagram of this utility model a kind of high frequency chopping isolation type bidirectional AC/DC circuit discharging state.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
The utility model proposes a kind of high frequency chopping isolation type bidirectional AC/DC circuit, as in figure 2 it is shown, include filter reactor, PWM converter, high frequency transformer former limit H brachium pontis, high frequency transformer, high frequency transformer secondary H brachium pontis.
Wherein, filter reactor includes inducer L1 ~ L3, is filtered the alternating current power supply of input.
PWM converter is the three phase full bridge circuit being made up of 6 switching tube V1 ~ V6, is filtered by capacitor C1 between PWM converter and high frequency transformer former limit H brachium pontis.
High frequency transformer former limit H brachium pontis is made up of four switching tube Vt1 ~ Vt4, and brachium pontis common point connects the former limit of high frequency transformer T1；High frequency transformer secondary H brachium pontis is made up of four switching tube Vt5 ~ Vt8, and brachium pontis common point connects high frequency transformer T1 secondary.Above-mentioned switching tube Vt1 ~ Vt8 is IGBT, and each switching tube includes antiparallel equivalent diode Vtd1 ~ Vtd8.
High frequency chopping isolation type bidirectional AC/DC circuit of the present utility model, when being operated in charging modes, its equivalent circuit is as shown in Figure 3, high frequency transformer former limit H brachium pontis switching tube Vt1 ~ Vt4 is operated under phase shift BUCK pattern, C1 two ends DC current is transformed to high frequency electric, transform to secondary through high frequency transformer T1, then after the equivalent diode Vtd5 ~ Vtd8 rectification of high frequency transformer secondary H brachium pontis switching tube Vt5 ~ Vt8, become DC current be sent to load-side.
When being operated in discharge mode, equivalent circuit is as shown in Figure 4, high frequency transformer secondary H brachium pontis switching tube Vt5 ~ Vt8 is operated under phase shift BUCK pattern, it is high-frequency ac current by the DC current inversion of load-side, former limit is transferred the energy to through high frequency transformer, DC current is become after the equivalent diode Vtd1 ~ Vtd4 rectification of high frequency transformer former limit H brachium pontis switching tube Vt1 ~ Vt4, then can AC network by energy foldback by PWM converter.
When high frequency chopping isolation type bidirectional AC/DC circuit of the present utility model is operated in charge mode, low-pressure side is equivalent to diode uncontrollable rectifier, and when being operated in discharge mode, high-pressure side is equivalent to diode uncontrollable rectifier, has and controls the feature simple, reliability is high.
In high frequency chopping isolation type bidirectional AC/DC circuit of the present utility model, the use of high frequency transformer, instead of traditional Industrial Frequency Transformer, reduce complete machine weight, reduce volume, improve the power density of complete machine, use high-frequency isolation transformer, under the conditions of Same Efficieney, volume is only the 20% of Industrial Frequency Transformer；Use high frequency phase shift BUCK technology, the wide ranges that the input voltage of AC/DC allows, and the input voltage range of power frequency type AC/DC circuit is narrow, when line voltage raises, power frequency type AC/DC can not keep normal voltage to export.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (4)
1. a high frequency chopping isolation type bidirectional AC/DC circuit, it is characterised in that including: filter reactor, PWM converter, high frequency transformer former limit H brachium pontis, high frequency transformer, high frequency transformer secondary H brachium pontis；
Wherein, the alternating current power supply of input is filtered by filter reactor；
PWM converter is the three phase full bridge circuit being made up of 6 switching tubes, passes through capacitor filtering between PWM converter and high frequency transformer former limit H brachium pontis；
High frequency transformer former limit H brachium pontis is made up of four switching tubes, and brachium pontis common point connects the former limit of high frequency transformer；
High frequency transformer secondary H brachium pontis is made up of four switching tubes, and brachium pontis common point connects high frequency transformer secondary.
2. high frequency chopping isolation type bidirectional AC/DC circuit as claimed in claim 1, it is characterised in that 8 switching tubes of described high frequency transformer former limit H brachium pontis and high frequency transformer secondary H brachium pontis are IGBT, and each switching tube includes antiparallel equivalent diode.
3. high frequency chopping isolation type bidirectional AC/DC circuit as claimed in claim 2, it is characterized in that, when being operated in charging modes, high frequency transformer former limit H brachium pontis switching tube is operated under phase shift BUCK pattern, capacitor two ends DC current is transformed to high frequency electric, transform to secondary through high frequency transformer, then after the equivalent diode rectification of high frequency transformer secondary H brachium pontis switching tube, become DC current be sent to load-side.
4. high frequency chopping isolation type bidirectional AC/DC circuit as claimed in claim 2, it is characterized in that, when being operated in discharge mode, high frequency transformer secondary H brachium pontis switching tube is operated under phase shift BUCK pattern, it is high-frequency ac current by the DC current inversion of load-side, transfer the energy to former limit through high frequency transformer, after the equivalent diode rectification of high frequency transformer former limit H brachium pontis switching tube, become DC current, then by PWM converter, energy foldback is returned AC network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620263283.3U CN205490225U (en) | 2016-03-31 | 2016-03-31 | Two -way ACDC circuit of high -frequency chopper isolated form |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620263283.3U CN205490225U (en) | 2016-03-31 | 2016-03-31 | Two -way ACDC circuit of high -frequency chopper isolated form |
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| CN205490225U true CN205490225U (en) | 2016-08-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329937A (en) * | 2016-09-08 | 2017-01-11 | 中车大连电力牵引研发中心有限公司 | Bidirectional phase-shift full-bridge DC-DC converter |
| CN109033560A (en) * | 2018-07-05 | 2018-12-18 | 南方电网科学研究院有限责任公司 | A kind of emulation mode of power electronic circuit |
| CN109738703A (en) * | 2018-11-15 | 2019-05-10 | 湖南大学 | High pressure wide-band impedance measuring device and its control method |
| CN111726022A (en) * | 2020-03-13 | 2020-09-29 | 南京理工大学 | Nine-bridge-arm single-stage isolated three-phase bidirectional AC/DC converter |
-
2016
- 2016-03-31 CN CN201620263283.3U patent/CN205490225U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329937A (en) * | 2016-09-08 | 2017-01-11 | 中车大连电力牵引研发中心有限公司 | Bidirectional phase-shift full-bridge DC-DC converter |
| CN109033560A (en) * | 2018-07-05 | 2018-12-18 | 南方电网科学研究院有限责任公司 | A kind of emulation mode of power electronic circuit |
| CN109738703A (en) * | 2018-11-15 | 2019-05-10 | 湖南大学 | High pressure wide-band impedance measuring device and its control method |
| CN111726022A (en) * | 2020-03-13 | 2020-09-29 | 南京理工大学 | Nine-bridge-arm single-stage isolated three-phase bidirectional AC/DC converter |
| CN111726022B (en) * | 2020-03-13 | 2022-09-06 | 南京理工大学 | Nine-bridge-arm single-stage isolated three-phase bidirectional AC/DC converter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A high frequency chopper isolating bidirectional AC/DC circuit Effective date of registration: 20171113 Granted publication date: 20160817 Pledgee: Qingdao high technology financing Company limited by guarantee Pledgor: QINGDAO GELIN NEW ENERGY TECHNOLOGIES CO.,LTD. Registration number: 2017370010075 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181119 Granted publication date: 20160817 Pledgee: Qingdao high technology financing Company limited by guarantee Pledgor: QINGDAO GELIN NEW ENERGY TECHNOLOGIES CO.,LTD. Registration number: 2017370010075 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240228 Address after: Room 101, Building 188, No. 702 Shanhe Road, Chengyang District, Qingdao City, Shandong Province, 266000 Patentee after: Qingdao kairuitong Energy Technology Co.,Ltd. Country or region after: China Address before: No. 19 Zhongxing Road, Zhonghuangbu Community, Chengyang District, Qingdao City, Shandong Province, 266000 Patentee before: QINGDAO GELIN NEW ENERGY TECHNOLOGIES CO.,LTD. Country or region before: China |
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