CN206250993U - A kind of high-power PWM rectification circuits of the pulse of combined type 48 - Google Patents
A kind of high-power PWM rectification circuits of the pulse of combined type 48 Download PDFInfo
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- CN206250993U CN206250993U CN201621318463.3U CN201621318463U CN206250993U CN 206250993 U CN206250993 U CN 206250993U CN 201621318463 U CN201621318463 U CN 201621318463U CN 206250993 U CN206250993 U CN 206250993U
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Abstract
The utility model discloses a kind of high-power PWM rectification circuits of the pulse of combined type 48, including three-phase voltage source（1）, load R（2）, it is characterised in that：The three-phase voltage source（1）, load R（2）Between be provided with two groups of four-way current transformers of series connection（3）, two groups of four-way current transformers of series connection（3）AC and three-phase voltage source（1）Between be provided with filter circuit（4）, DC side is by filter capacitor C（5）Parallel connection, two groups of four-way current transformers of series connection（3）Including first group of four-way current transformer（31）, second group of four-way current transformer（32）, the problems such as the output characteristics that the utility model efficiently solves the connection in series-parallel of existing power rectifier scheme including power device, many level and multimode phase-shifting transformer assembled scheme exist in use is difficult to optimize, rectifier power circuit structure and control program tend to complexity.
Description
Technical field
The utility model is related to electric and electronic technical field, and in particular to a kind of high-power PWM rectifications of the pulse of combined type 48
Circuit.
Background technology
Big-power rectification power supply has in occasions such as generation of electricity by new energy, Large Copacity uninterruption power source and high power AC speed governing
And be widely applied, power device voltage x current stress is higher during its high-power transformation of electrical energy feature causes rectification circuit,
Difficulty is brought to device selection, power rectifier circuit has strict wanting to overall efficiency and AC side Power Factor in addition
Ask, it is contemplated that requirements above and feature, current power rectifier scheme mainly have the connection in series-parallel of power device, many level and
Multimode phase-shifting transformer assembled scheme.
Power device series parallel arrangement can improve its equivalent voltage electric current by norm, but corresponding pressure and sharing control plan
The reliability of rectifier is slightly reduced, makes its output characteristics be difficult to optimize.It is consistent by multiple parameters in multi-level rectifying circuit
The equal component voltage of switching device, so as to improve power system capacity and equivalent switching frequency, current many level schemes mainly have diode
Clamp, three kinds of structures of striding capacitance type and cascade connection type, in order to obtain preferable network side current waveform and improve net side power factor,
Power device switching frequency still will reach several KHzs, and this is still higher to Large Copacity rectification circuit, and with level number
Improve, rectifier power circuit structure and control program tend to complicated.Multimode scheme is by the consistent three phase rectifier of multiple structures
The AC of device is connected to AC network by phase-shifting transformer coupled modes, and rationally design three-phase rectifier AC phase shift becomes
The phase shift angle of depressor, can eliminate the low-order harmonic of AC, realize the sineization of current on line side, and the port number for combining
More AC waveform qualities are higher, but the more phase-shifting transformer structure more sophisticateds of this port number, and number of windings becomes many, optimization
Difficult design, it is difficult to the accurate low-order harmonic for eliminating AC.
The content of the invention
The utility model purpose be directed to the connection in series-parallel of existing power rectifier scheme including power device, many level and
The output characteristics that multimode phase-shifting transformer assembled scheme exists in use is difficult to optimize, rectifier power circuit structure
The problems such as tending to complexity with control program proposes a kind of high-power PWM rectification circuits of the pulse of combined type 48.
The utility model is achieved through the following technical solutions：
A kind of high-power PWM rectification circuits of the pulse of combined type 48, including three-phase voltage source（1）, load R（2）, its feature exists
In：The three-phase voltage source（1）, load R（2）Between be provided with two groups of four-way current transformers of series connection（3）, two groups the four of series connection
Passage current transformer（3）AC and three-phase voltage source（1）Between be provided with filter circuit（4）, DC side is by filter capacitor C
（5）Parallel connection, two groups of four-way current transformers of series connection（3）Including first group of four-way current transformer（31）, second group of four-way unsteady flow
Device（32）.
The further Technological improvement plan of the utility model is：
First group of four-way current transformer（31）Including passage 1, passage 2, passage 3 and passage 4, passage 1, passage 2,
Passage 3 and passage 4 are by transformer, inverter（6）The transformer secondary of composition, passage 1 and passage 2 all uses star-like company
Connect, primary side is respectively adopted the phase shift connected mode of delayed 7.5 degree and advanced 7.5 degree；The transformer secondary of passage 3 and passage 4 is all
Connected using triangular form, primary side is respectively adopted the phase shift connected mode of delayed 7.5 degree and advanced 7.5 degree.
The further Technological improvement plan of the utility model is：
Second group of four-way current transformer（32）Circuit structure and first group of four-way current transformer（31）, i.e., second group
Four-way current transformer（32）Including passage 1, passage 2, passage 3 and passage 4, passage 1, passage 2, passage 3 and passage 4 by
Transformer, inverter（6）The transformer secondary of composition, passage 1 and passage 2 all uses star-like connection, and primary side is respectively adopted delayed
7.5 degree and advanced 7.5 degree of phase shift connected mode；The transformer secondary of passage 3 and passage 4 is all connected using triangular form, primary side
The phase shift connected mode of delayed 7.5 degree and advanced 7.5 degree is respectively adopted.
The further Technological improvement plan of the utility model is：
The filter circuit（4）It is made up of inductance L, resistance R.
The further Technological improvement plan of the utility model is：
The inverter（6）Using three-phase inversion bridge circuit.
The further Technological improvement plan of the utility model is：
First group of four-way current transformer（31）The transformer alternating side of passage 1, passage 2, passage 3 and passage 4 around
Group is used and is connected in series mode, inverter（6）DC side uses parallel.
The further Technological improvement plan of the utility model is：
Second group of four-way current transformer（32）The transformer alternating side of passage 1, passage 2, passage 3 and passage 4 around
Group is used and is connected in series mode, inverter（6）DC side uses parallel.
The utility model compared with prior art, with following obvious advantage：
First, one Core Superiority of the high-power PWM rectification circuits of the utility model is the eight phase shifts change in eight passages
Depressor only has two specifications, compared to eight phase-shifting transformer specifications of traditional whole circuit of eight passages multiple-pulse, with modularization journey
Degree is high, the easy advantage of winding optimization design；
2nd, the utility model is made up of eight phase-shifting transformers, eight groups of three-phase bridge type converters and net side filter circuit, should
The pulse rectifier of eight passage 48 uses transformer alternating side windings in series, and inverter direct-flow side combination in parallel, each group is inverse
Become device drive signal to stagger each other certain phase, high-quality current waveform can be obtained in net side.
Brief description of the drawings
Fig. 1 is the utility model circuit structure schematic diagram；
Fig. 2 is the utility model inverter circuit diagram.
Specific embodiment
The utility model includes three-phase voltage source 1, load 2 as shown in Figure 1, 2, between the three-phase voltage source 1, load R2
Be provided with two groups of four-way current transformers 3 of series connection, two groups of ACs of the four-way current transformer 3 of series connection and three-phase voltage source 1 it
Between be provided with filter circuit 4, DC side is in parallel by filter capacitor C5, and two groups of four-way current transformers 3 of series connection include first group
31, second group of four-way current transformer 32 of four-way current transformer；First group of four-way current transformer 31 include passage 1, passage 2,
Passage 3 and passage 4, passage 1, passage 2, passage 3 and passage 4 are constituted by transformer, inverter 6, passage 1 and passage 2
Transformer secondary all use star-like connection, primary side is respectively adopted the phase shift connected mode of delayed 7.5 degree and advanced 7.5 degree；It is logical
The transformer secondary of road 3 and passage 4 is all connected using triangular form, and primary side is respectively adopted the phase shift of delayed 7.5 degree and advanced 7.5 degree
Connected mode；
The circuit structure and first group of four-way current transformer 31 of second group of four-way current transformer 32, i.e., second group four-way
Road current transformer 32 includes passage 1, passage 2, passage 3 and passage 4, and passage 1, passage 2, passage 3 and passage 4 are by transformation
Device, inverter 6 are constituted, and the transformer secondary of passage 1 and passage 2 all uses star-like connection, primary side be respectively adopted delayed 7.5 degree with
Advanced 7.5 degree of phase shift connected mode；The transformer secondary of passage 3 and passage 4 is all connected using triangular form, and primary side is respectively adopted
Delayed 7.5 degree and advanced 7.5 degree of phase shift connected mode；The filter circuit 4 is made up of inductance L, resistance R；The inverter 6
Using three-phase inversion bridge circuit.The transformer of the passage 1 of first group of four-way current transformer 31, passage 2, passage 3 and passage 4
Using mode is connected in series, the DC side of inverter 6 uses parallel to AC winding.Second group of four-way unsteady flow
The transformer alternating side winding of the passage 1 of device 32, passage 2, passage 3 and passage 4 is used and is connected in series mode, the direct current of inverter 6
Side uses parallel.
Principle of the present utility model is sketched with reference to accompanying drawing 1,2：
The utility model is made up of the four-way current transformer 3 of two groups of completely the same series connection of two groups of structures, as shown in figure 1,
Every group of four-way rectifier includes four passages, and the transformer secondary of passage 1 and passage 2 all uses star-like connection, and primary side point
Cai Yong not the delayed 7.5 degree phase shift connected modes with advanced 7.5 degree；The transformer secondary of passage 3 and passage 4 all uses triangular form
Connection, and primary side is respectively adopted the phase shift connected mode of delayed 7.5 degree and advanced 7.5 degree；According to the star of transformer secondary winding
30 degree of the relation of 30 degree of phase differences of type triangular form winding and reasonable turn ratio, control passage 1 and 3 drive signal misphase of passage,
6k ± 1 subharmonic in AC output waveform can be eliminated, identical control signal phase relation is met between passage 2 and 4
Can also eliminate same harmonic wave, comprehensive first group of passage of four-way current transformer 31 1,3 and passage 2,4 transformer primary side windings ±
7.5 degree of phase shift angle, controls the 15 degree of type of drive of misphase between them, you can 12k ± 1 time for eliminating AC output is humorous
Ripple, makes to comprise only 24k ± 1 subharmonic in exchange side waveform.24 completely the same impulse commutations of second group of four-way current transformer 32
The control signal of each passage of device respectively after first group of 7.5 degree of respective channel control signal, the output of two groups of rectifier ACs is logical
Transformer coupled superposition is crossed, 24k ± 1 subharmonic in output waveform is significantly suppressed.The high-power PWM rectifications of the pulse of combined type 48
Circuit in the control signal of passage 1 to 4 with this delayed 15 degree, between two groups of rectifiers under 7.5 degree of control modes of misphase, the 48 of output
48k ± 1 subharmonic is comprised only in staircase waveform, is laid the foundation to obtain high-quality current on line side.
Technological means disclosed in the utility model scheme is not limited only to the technological means disclosed in above-mentioned implementation method, also
Including being combined constituted technical scheme by above technical characteristic.It should be pointed out that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and moisten
Decorations are also considered as protection domain of the present utility model.
Claims (7)
1. a kind of high-power PWM rectification circuits of the pulse of combined type 48, including three-phase voltage source（1）, load R（2）, its feature exists
In：The three-phase voltage source（1）, load R（2）Between be provided with two groups of four-way current transformers of series connection（3）, two groups the four of series connection
Passage current transformer（3）AC and three-phase voltage source（1）Between be provided with filter circuit（4）, DC side is by filter capacitor C
（5）Parallel connection, two groups of four-way current transformers of series connection（3）Including first group of four-way current transformer（31）, second group of four-way unsteady flow
Device（32）.
2. high-power PWM rectification circuits of a kind of combined type 48 according to claim 1 pulse, it is characterised in that：Described
One group of four-way current transformer（31）Including passage 1, passage 2, passage 3 and passage 4, passage 1, passage 2, passage 3 and passage 4
By transformer, inverter（6）The transformer secondary of composition, passage 1 and passage 2 all uses star-like connection, and primary side is respectively adopted
Delayed 7.5 degree and advanced 7.5 degree of phase shift connected mode；The transformer secondary of passage 3 and passage 4 is all connected using triangular form,
Primary side is respectively adopted the phase shift connected mode of delayed 7.5 degree and advanced 7.5 degree.
3. high-power PWM rectification circuits of a kind of combined type 48 according to claim 1 and 2 pulse, it is characterised in that：It is described
Second group of four-way current transformer（32）Circuit structure and first group of four-way current transformer（31）, i.e., second group four-way current transformer
（32）Including passage 1, passage 2, passage 3 and passage 4, passage 1, passage 2, passage 3 and passage 4 are by transformer, inversion
Device（6）Composition, the transformer secondary of passage 1 and passage 2 all uses star-like connection, and primary side is respectively adopted delayed 7.5 degree and in advance
7.5 degree of phase shift connected mode；The transformer secondary of passage 3 and passage 4 is all connected using triangular form, and primary side is respectively adopted delayed
7.5 degree and advanced 7.5 degree of phase shift connected mode.
4. high-power PWM rectification circuits of a kind of combined type 48 according to claim 1 and 2 pulse, it is characterised in that：It is described
Filter circuit（4）It is made up of inductance L, resistance R.
5. high-power PWM rectification circuits of a kind of combined type 48 according to claim 3 pulse, it is characterised in that：It is described inverse
Become device（6）Using three-phase inversion bridge circuit.
6. high-power PWM rectification circuits of a kind of combined type 48 according to claim 2 pulse, it is characterised in that：Described
One group of four-way current transformer（31）The transformer alternating side winding of passage 1, passage 2, passage 3 and passage 4 is used and is connected in series
Mode, inverter（6）DC side uses parallel.
7. high-power PWM rectification circuits of a kind of combined type 48 according to claim 3 pulse, it is characterised in that：Described
Two groups of four-way current transformers（32）The transformer alternating side winding of passage 1, passage 2, passage 3 and passage 4 is used and is connected in series
Mode, inverter（6）DC side uses parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621318463.3U CN206250993U (en) | 2016-12-05 | 2016-12-05 | A kind of high-power PWM rectification circuits of the pulse of combined type 48 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621318463.3U CN206250993U (en) | 2016-12-05 | 2016-12-05 | A kind of high-power PWM rectification circuits of the pulse of combined type 48 |
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| CN206250993U true CN206250993U (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621318463.3U Expired - Fee Related CN206250993U (en) | 2016-12-05 | 2016-12-05 | A kind of high-power PWM rectification circuits of the pulse of combined type 48 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317488A (en) * | 2017-08-14 | 2017-11-03 | 中车唐山机车车辆有限公司 | Type multiphase permanent magnet generator commutation system |
| CN107947621A (en) * | 2017-12-15 | 2018-04-20 | 淮阴工学院 | The high-power PWM grid-connected inverter circuits of 96 pulse instantaneous values feedback of multichannel |
-
2016
- 2016-12-05 CN CN201621318463.3U patent/CN206250993U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317488A (en) * | 2017-08-14 | 2017-11-03 | 中车唐山机车车辆有限公司 | Type multiphase permanent magnet generator commutation system |
| CN107947621A (en) * | 2017-12-15 | 2018-04-20 | 淮阴工学院 | The high-power PWM grid-connected inverter circuits of 96 pulse instantaneous values feedback of multichannel |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170613 Termination date: 20171205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |