CN106602854A - Bidirectional chopper - Google Patents
Bidirectional chopper Download PDFInfo
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- CN106602854A CN106602854A CN201510678909.7A CN201510678909A CN106602854A CN 106602854 A CN106602854 A CN 106602854A CN 201510678909 A CN201510678909 A CN 201510678909A CN 106602854 A CN106602854 A CN 106602854A
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- igbt
- circuit
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- way chopper
- chopper
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Abstract
The invention discloses a bidirectional chopper. The bidirectional chopper comprises a bidirectional chopper circuit containing two IGBT modules. Each IGBT module comprises an IGBT and a freewheeling diode which are connected in a reverse parallel mode. A bypass circuit which is connected between a high voltage end and a low voltage end of the bidirectional chopper circuit is also included. The bypass circuit forms a current path between the high voltage end and the low voltage end of the bidirectional chopper circuit through the freewheeling diodes of the two IGBT modules, and when the bidirectional chopper circuit does not start a chopper function, a current flowing to the two IGBT modules is bypassed. In the invention, when the bidirectional chopper is not started, the current can be prevented from flowing to the IGBT; when the high voltage end of the bidirectional chopper has a heavy current or a short circuit condition is generated, protection is executed; and the bidirectional chopper possesses advantages that the structure is simple; cost is low; and the chopper is safe and reliable and so on.
Description
Technical field
The present invention relates to chopper technique field, more particularly to a kind of two-way chopper with short-circuit protection function.
Background technology
Two-way DC/DC choppers can as realize the chopper circuit boosted with two kinds of functions of blood pressure lowering, by two IGBT（Insulated Gate Bipolar
Transistor, insulated gate bipolar transistor）Module and control electric current flow to form copped wave booster circuit, chopping depressuring circuit.Current two-way DC/DC choppers, such as traditional two-way boost/buck chopper circuits, when it is as chopping depressuring circuit, input voltage is powered by fuse to subsequent conditioning circuit；When as copped wave booster circuit, the continued flow tube of two IGBT modules will constitute current path with fuse, and before two-way DC/DC choppers do not work, and the input of two-way DC/DC choppers is when having high current or short circuit, due to the i of continued flow tube in IGBT module2t（Transient current amount of bearing）Much smaller than the i of fuse2T, then can burn continued flow tube in IGBT module, thus safety is not high, while the increase of cost can be caused.
The content of the invention
The technical problem to be solved in the present invention is that：For the technical problem that prior art is present; the present invention provides current direction IGBT when one kind can avoid two-way chopper not actuated; and perform protection, and simple and compact for structure, required low cost, safe and reliable two-way chopper when two-way chopper has high current or Short-circuit Working Condition.
To solve above-mentioned technical problem, technical scheme proposed by the present invention is：
A kind of two-way chopper, including the two-way chopper circuit containing two IGBT modules, each described IGBT module includes the IGBT and fly-wheel diode of inverse parallel connection, and the two-way chopper circuit accesses high-pressure side by fuse FU1, it is characterised in that：Also include the bypass circuit being connected between the high-pressure side of the two-way chopper circuit and low-pressure end, the bypass circuit is worked as will form current path between the two-way chopper circuit mesohigh end and low-pressure end by the fly-wheel diode of described two IGBT modules, and during the not actuated copped wave function of the two-way chopper circuit, the electric current for flowing to two IGBT modules is bypassed.
As a further improvement on the present invention the bypass circuit is bypass diode D4, and the anode of the bypass diode D4 is connected with the low-pressure end of the two-way chopper circuit, and negative electrode is connected by fuse FU1 with the high-pressure side of the two-way chopper circuit.
As a further improvement on the present invention：I of the instantaneous maximum current amount of bearing of the bypass diode D4 more than the fuse FU12t。
As a further improvement on the present invention：The two-way chopper circuit is two-way boost/buck chopper circuits.
As a further improvement on the present invention：The two-way boost/buck chopper circuits include the first IGBT module, inductance L1 and the second IGBT module being sequentially connected, first IGBT module includes two IGBT power cells being connected in series, and each described IGBT power cell and the second IGBT module include IGBT and the fly-wheel diode being connected in parallel.
As a further improvement on the present invention：The first filter capacitor C2 is additionally provided between the inductance L1 and second IGBT module.
As a further improvement on the present invention：The high-pressure side of the two-way chopper circuit, low-pressure end further respectively have the second filter capacitor C1, the 3rd filter capacitor C3.
Compared with prior art, it is an advantage of the current invention that：
1）The present invention at the two ends of two-way chopper circuit by arranging bypass circuit; when input power forms current path and causes input voltage equal with output voltage with the fly-wheel diode of two IGBT modules in two-way chopper circuit; and during the not actuated copped wave function of two-way chopper circuit; the electric current for flowing to two IGBT modules is bypassed by bypass circuit; current direction IGBT when avoiding two-way chopper not actuated; so as to when there is high current or short circuit in two-way chopper circuit; can not be burned out with effective protection IGBT module, improve the security reliability of two-way chopper；
2）The present invention carries out bypass protection by bypass diode, makes instantaneous maximum current amount of bearing i of bypass diode2Is of the t more than fuse2T, so as to when two-way chopper circuit is used as copped wave booster circuit, two IGBT modules form current path with fuse, current path can be powered by bypass diode, even if thus chopper circuit occurs that when excessively stream or short circuit fuse can be first passed through, damage without causing IGBT module, does not result in the scaling loss of bypass diode yet, can effectively reduce the cost of circuit and the reliability of raising circuit.
Description of the drawings
Fig. 1 is the structural representation of two-way chopper in the present embodiment.
Marginal data：1st, two-way chopper circuit；2nd, bypass circuit.
Specific embodiment
Below in conjunction with Figure of description and concrete preferred embodiment, the invention will be further described, but protection domain not thereby limiting the invention.
As shown in Figure 1, the two-way chopper of the present embodiment includes the two-way chopper circuit containing two IGBT modules, each IGBT module includes the IGBT and fly-wheel diode of inverse parallel connection, also include the bypass circuit being connected between the high-pressure side of two-way chopper circuit and low-pressure end, bypass circuit will form current path when the fly-wheel diode for passing through two IGBT modules between the mesohigh end of two-way chopper circuit 1 and low-pressure end, and during the not actuated copped wave function of two-way chopper circuit 1, the electric current for flowing to two IGBT modules is bypassed.Thus two IGBT modules of current direction when two-way chopper circuit 1 is not actuated can be avoided, and when there is high current or short circuit with the high-pressure side in two-way chopper circuit 1, can be burned out with effective protection IGBT module, improve the security reliability of two-way chopper.
Referring to Fig. 1, two-way chopper circuit 1 is two-way boost-buck chopper circuits in the present embodiment, with boosting and buck functionality, including the first IGBT module, inductance L1 and the second IGBT module that are sequentially connected, first IGBT module includes two IGBT power cells being connected in series, and each IGBT power cell and the 2nd IGBT include IGBT and the fly-wheel diode being connected in parallel.First IGBT module specifically includes an IGBT power cells, the second power cell, the emitter stage of IGBT is connected with the colelctor electrode of the 2nd IGBT power cells in a wherein IGBT power cells, first IGBT power cells connect high-pressure side by fuse FU1, the emitter stage of IGBT, the colelctor electrode of the 2nd IGBT power cells connect respectively the colelctor electrode of IGBT in the second IGBT module by inductance L1 in first IGBT power cells, and the emitter stage of IGBT connects the positive pole of low-pressure end in the 2nd IGBT power cells.The DC1 of two-way chopper circuit 1（DC1+/ DC1-）For high-pressure side, DC2（DC2+/DC2-）For low-pressure end, the input voltage at DC1 ends is powered by fuse FU1 to subsequent conditioning circuit, wherein when it is output voltage terminal that DC1+/DC1- is Input voltage terminal, DC2+/DC2-, as chopping depressuring circuit；Otherwise when DC2+/DC2- is that Input voltage terminal, DC1+/DC1- are changed into output voltage terminal, as copped wave booster circuit.
The present embodiment at the two ends of two-way chopper circuit 1 of said structure by arranging bypass circuit 2, to avoid as copped wave booster circuit and it is not actuated when two IGBT of current direction, in other embodiments, the present invention can also be applied in the two-way chopper circuit of other structures, with when the two-way chopper circuit applied exists and can form the situation of current path by the continued flow tube of each IGBT module between high-pressure side and low-pressure end, by arranging the electric current that the bypass of bypass circuit 2 flows to each IGBT module at two-way chopper circuit two ends, even if during so that there is high current or short circuit, can be burned out with effective protection IGBT module.
Because above-mentioned two-way chopper circuit 1 as copped wave booster circuit when also not working, voltage can also be powered by the sustained diode 1 in the sustained diode 3 in IGBT module VT2, inductance L1, IGBT module VT1 and fuse FU1 to subsequent conditioning circuit, i.e. fly-wheel diode will form current path in input power and two IGBT modules, make DC1+/DC1- equal with the voltage of DC2+/DC2-, if now DC1+/DC1- inputs（High-pressure side）When there is high current or short circuit, then IGBT module VT2 and VT1 scaling loss will be caused.In the present embodiment; bypass protection is carried out by arranging bypass diode D4 between the high-pressure side and low-pressure end of two-way chopper circuit 1; by bypass diode D4 when above-mentioned two-way chopper circuit 1 is used as copped wave booster circuit; input power is carried out into current bypass to avoid two IGBT modules of current direction before copped wave booster circuit is not actuated, so as to perform effective protection when high current or Short-circuit Working Condition occur in DC1 ends.
Referring to Fig. 1, the anode of the present embodiment bypass diode D4 is connected with the low-pressure end of two-way chopper circuit 1, and negative electrode is connected by fuse FU1 with the high-pressure side of two-way chopper circuit 1, makes bypass diode D4 conductings when forming current path.Above-mentioned two-way chopper circuit 1 is when DC2+/DC2- is that Input voltage terminal, DC1+/DC1- are changed into output voltage terminal, the fly-wheel diode and fuse FU1 of two IGBT modules will form current path, then the anode of bypass diode D4 specifically connects the B points that the A points at DC2+/DC2- ends, negative electrode connect DC1+/DC1- ends especially by fuse FU1.
In the present embodiment, instantaneous maximum current amount of bearing i of bypass diode D42Is of the t more than fuse FU12t，When two-way chopper circuit 1 is used as copped wave booster circuit，That is DC2+/DC2- is Input voltage terminal、DC1+/DC1- is output voltage terminal，When chopper circuit does not work，Because the tube voltage drop of sustained diode 3 of IGBT module VT2 of sustained diode 1 and second in the first IGBT module VT1 is more than the tube voltage drop of bypass diode D4，Then current path can be powered by bypass diode D4 to DC1+，Even if DC1+/DC1- ends occur that when excessively stream or short circuit fuse FU1 can be first passed through，Damage without causing IGBT module VT1 and VT2，The scaling loss of bypass diode D4 is not resulted in yet，And the cost of fuse FU1 is far below IGBT module VT1 and the cost of VT2，The cost that circuit can effectively be reduced and the reliability for improving circuit.
In the present embodiment, the first filter capacitor C2 is additionally provided between inductance L1 and the second IGBT module, smothing filtering is carried out to the output voltage of chopper by the first filter capacitor C2.
In the present embodiment, the end of two-way chopper circuit 1 is additionally provided with the second filter capacitor C1, the 3rd filter capacitor C3, second filter capacitor C1, the 3rd filter capacitor C3 Support Capacitor, filter capacitor each other, when i.e. one of them is as Support Capacitor, another is filter capacitor, prevents from coming from the impact of the voltage overshoot of input and instantaneous overvoltage to IGBT.
Above-mentioned simply presently preferred embodiments of the present invention, not makees any pro forma restriction to the present invention.Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention.Therefore, every content without departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should fall in the range of technical solution of the present invention protection.
Claims (7)
1. a kind of two-way chopper, including the two-way chopper circuit containing two IGBT modules（1）, IGBT and fly-wheel diode of each described IGBT module including inverse parallel connection, it is characterised in that：Also include being connected to the two-way chopper circuit（1）High-pressure side and low-pressure end between bypass circuit（2）, the bypass circuit（2）When the two-way chopper circuit（1）Current path, and the two-way chopper circuit will be formed by the fly-wheel diode of described two IGBT modules between mesohigh end and low-pressure end（1）During not actuated copped wave function, the electric current for flowing to two IGBT modules is bypassed.
2. two-way chopper according to claim 1, it is characterised in that：The bypass circuit（2）For bypass diode D4, the anode of the bypass diode D4 and the two-way chopper circuit（1）Low-pressure end connection, negative electrode is by fuse FU1 and the two-way chopper circuit（1）High-pressure side connection.
3. two-way chopper according to claim 2, it is characterised in that：I of the instantaneous maximum current amount of bearing of the bypass diode D4 more than the fuse FU12t。
4. the two-way chopper according to claim 1 or 2 or 3, it is characterised in that：The two-way chopper circuit（1）For two-way boost/buck chopper circuits.
5. two-way chopper according to claim 4, it is characterised in that：The two-way boost/buck chopper circuits include the first IGBT module, inductance L1 and the second IGBT module being sequentially connected, first IGBT module includes two IGBT power cells being connected in series, and each the IGBT power cells, second IGBT module include the IGBT and fly-wheel diode of inverse parallel connection.
6. two-way chopper according to claim 5, it is characterised in that：The first filter capacitor C2 is additionally provided between the inductance L1 and second IGBT module.
7. two-way chopper according to claim 6, it is characterised in that：The two-way chopper circuit（1）High-pressure side, low-pressure end further respectively have the second filter capacitor C1, the 3rd filter capacitor C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510678909.7A CN106602854B (en) | 2015-10-20 | 2015-10-20 | A kind of two-way chopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510678909.7A CN106602854B (en) | 2015-10-20 | 2015-10-20 | A kind of two-way chopper |
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| CN106602854A true CN106602854A (en) | 2017-04-26 |
| CN106602854B CN106602854B (en) | 2019-07-16 |
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| CN201510678909.7A Active CN106602854B (en) | 2015-10-20 | 2015-10-20 | A kind of two-way chopper |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252313A (en) * | 2007-12-17 | 2008-08-27 | 福建师范大学 | Self-adapting power supply voltage converter |
| CN201266840Y (en) * | 2008-06-20 | 2009-07-01 | 比亚迪股份有限公司 | DC power supply manager, power supply translation circuit and battery bag |
| CN202364144U (en) * | 2011-11-24 | 2012-08-01 | 上海煦达新能源科技有限公司 | Bypass diode and bypass DC/DC converter of dual-stage photovoltaic inverter |
| JP2013192297A (en) * | 2012-03-12 | 2013-09-26 | Mitsubishi Electric Corp | Power conversion device |
| CN103633722A (en) * | 2013-11-14 | 2014-03-12 | 哈尔滨工程大学 | Rapid overshoot-free switching control circuit for maximum charging and discharging current and rapid switching control method for maximum charging and discharging current |
| CN205123571U (en) * | 2015-10-20 | 2016-03-30 | 长沙广义变流技术有限公司 | Two -way chopper |
-
2015
- 2015-10-20 CN CN201510678909.7A patent/CN106602854B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252313A (en) * | 2007-12-17 | 2008-08-27 | 福建师范大学 | Self-adapting power supply voltage converter |
| CN201266840Y (en) * | 2008-06-20 | 2009-07-01 | 比亚迪股份有限公司 | DC power supply manager, power supply translation circuit and battery bag |
| CN202364144U (en) * | 2011-11-24 | 2012-08-01 | 上海煦达新能源科技有限公司 | Bypass diode and bypass DC/DC converter of dual-stage photovoltaic inverter |
| JP2013192297A (en) * | 2012-03-12 | 2013-09-26 | Mitsubishi Electric Corp | Power conversion device |
| CN103633722A (en) * | 2013-11-14 | 2014-03-12 | 哈尔滨工程大学 | Rapid overshoot-free switching control circuit for maximum charging and discharging current and rapid switching control method for maximum charging and discharging current |
| CN205123571U (en) * | 2015-10-20 | 2016-03-30 | 长沙广义变流技术有限公司 | Two -way chopper |
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| CN106602854B (en) | 2019-07-16 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Bidirectional chopper Effective date of registration: 20200511 Granted publication date: 20190716 Pledgee: Changsha Bank city branch of Limited by Share Ltd Pledgor: CHANGSHA GUANGYI CONVERTING TECHNIQUE Co.,Ltd. Registration number: Y2020980002119 |
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| PC01 | Cancellation 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: 20210421 Granted publication date: 20190716 Pledgee: Changsha Bank city branch of Limited by Share Ltd. Pledgor: CHANGSHA GUANGYI CONVERTING TECHNIQUE Co.,Ltd. Registration number: Y2020980002119 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A bidirectional chopper Effective date of registration: 20210427 Granted publication date: 20190716 Pledgee: Hunan Xingsha Rural Commercial Bank Co.,Ltd. quantang sub branch Pledgor: CHANGSHA GUANGYI CONVERTING TECHNIQUE Co.,Ltd. Registration number: Y2021980003071 |