CN101527517A - Twin-stage type matrix converter with direct-current excitation regulation and voltage frequency transformation - Google Patents
Twin-stage type matrix converter with direct-current excitation regulation and voltage frequency transformation Download PDFInfo
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- CN101527517A CN101527517A CN200910030725A CN200910030725A CN101527517A CN 101527517 A CN101527517 A CN 101527517A CN 200910030725 A CN200910030725 A CN 200910030725A CN 200910030725 A CN200910030725 A CN 200910030725A CN 101527517 A CN101527517 A CN 101527517A
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- brachium pontis
- power switch
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- 230000005284 excitation Effects 0.000 title claims abstract description 35
- 239000011159 matrix material Substances 0.000 title claims abstract description 16
- 230000009466 transformation Effects 0.000 title abstract 2
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 230000001588 bifunctional effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a twin-stage type matrix converter with direct-current excitation regulation and voltage frequency transformation, comprising a three-phase bridge type structure formed by two-way power switches, a buffer circuit, a five-bridge-arm structure formed by one-way power switch tubes and two equivalent direct current buses, wherein the three-phase bridge type structure, the buffer circuit and the five-bridge-arm structure are connected between the two equivalent direct current buses in parallel. The invention has the advantages of small volume, light weight, compact structure, little harmonic content and high efficiency.
Description
Technical field
Invention relates to a kind of dual-level matrix frequency converter with DC excitation adjusting and voltage-frequency conversion, belongs to the technical field of the converter of AC Motor Control.
Background technology
Alternating current machine with DC excitation function can pass through control DC excitation electric current, thereby regulates the motor internal magnetic field easily.When such motor is done the motor use, have wider speed adjustable range and good control performance; When using as generator, by regulating excitation field, the assurance generator is kept normal output voltage when load variations.In addition, such motor has when making generator operation from the demagnetization function, has improved reliability of system operation.Such motor is divided into electric excitation structure and composite excitation structure from electric machine structure.Except that armature winding, also have a cover excitation winding in the electricity excitation structure motor, can regulate magnetic flux in the motor easily by regulating the exciting current that flows through in the excitation winding, thereby realize control motor.The motor of composite excitation structure has controlled advantage of electric excitation structure motor excitation and the high efficiency advantage of magneto concurrently, has wide prospect in industrial application.
From the Electric Machine Control angle, the general converter of handing over the orthogonal structure that adopts, the mode of inversion after the promptly first rectification, it has good speed adjusting performance, and has obtained extensive use.But also there are some intrinsic defectives in this structure, as not controlling rectification input power factor is reduced, and energy is difficult to realize two-way flow etc.
The alternating current machine excitation mode has multiple choices, as self-excitation, separate excitation etc.At present, during most of AC Motor Control system design excitation winding regulating circuit and main power conversion circuit are separated independent design, so not only increased excitation source, also increased volume, the weight of system simultaneously, reduced system reliability.
Summary of the invention
The present invention seeks to provides a kind of dual-level matrix frequency converter with DC excitation adjusting and voltage-frequency conversion at the defective that prior art exists.
The present invention adopts following technical scheme for achieving the above object:
The present invention has the dual-level matrix frequency converter of DC excitation adjusting and voltage-frequency conversion, it is characterized in that comprising two Equivalent DC buses, three-phase bridge structure, buffer circuit, five brachium pontis structures, wherein between in parallel successively and two the Equivalent DC buses of three-phase bridge structure, buffer circuit, five brachium pontis structures, the three-phase input AC is electrically connected on the mid point of each brachium pontis in the three-phase bridge structure, there is the output of two brachium pontis to connect excitation winding in the five brachium pontis structures, its excess-three three-phase alternating current of brachium pontis output behind Power Conversion in the five brachium pontis structures.
Matrix converter is a kind of novel existing good control performance and good input current quality, has simultaneously the friendship AC-AC converter of compact conformation, advantage such as reliable again.Compare with traditional AC-AC frequency converter and ac-dc-ac inverter device, matrix converter has following distinguishing feature:
(1) control degrees of freedom is big, Adjustable Output Voltage, and output frequency can be arbitrary value in theory--and be that perfect switch and controller processing speed enough are prerequisite soon with the power switch.
(2) input power factor can be regulated arbitrarily, can be in advance, can lag behind, and adjustable to extremely approaching 1.(3) input current waveform is good, no low-order harmonic, and waveform distortion is little.
(4) but the energy two-way flow, no intermediate dc link, compact conformation, volume is little.
The invention solves tradition and hand over the low shortcoming of orthogonal converter input power factor, saved reliability and useful life that storage capacitor has improved system; Simultaneously also saved field power supply, for alternating current machine provides a kind of new self-excitation scheme.
The present invention adopts matrix converter to realize hand over handing over Direct Transform as alternating current machine master power circuit, has avoided the intermediate energy storage link, has improved the power density of system, and energy can two-way flow, can realize the four-quadrant operation of motor.Do not use extra power supply to provide magnetization energy among the present invention, make system design obtain simplifying with power conversion circuit and field circuit are integrated as alternating current machine.Dual-level matrix frequency converter with DC excitation adjusting and voltage-frequency conversion proposed by the invention not only has the advantage of classical matrix converter, can also realize the excitation control of motor, has improved the integrated level and the reliability of system.
Description of drawings
Fig. 1 has DC excitation to be regulated and the bifunctional dual-level matrix frequency converter topological diagram of input and output voltage frequency translation;
Four kinds of basic bi-directional switch structure schematic diagrames of Fig. 2;
This topology of Fig. 3 is applied to the structured flowchart of the alternating current machine of DC excitation.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to invention:
As shown in Figure 1, a kind of have DC excitation adjusting and the bifunctional dual-level matrix frequency converter topology of input and output voltage frequency translation of the present invention.This topology has the dc bus of equivalence, is connected in being followed successively by of dc bus two ends from the input side to the outlet side: bidirectional switch (S
Up, S
Vp, S
Wp, S
Un, S
Vn, S
Wn) form three phase full bridge structure 1, use the buffer circuit 2 and the single-way switch (S that suppress with due to voltage spikes
Ap, S
Bp, S
Cp, S
An, S
Bn, S
Cn, S
F1, S
F2, S
F3, S
F4) and fly-wheel diode (D
Ap, D
Bp, D
Cp, D
An, D
Bn, D
Cn, D
F1, D
F2, D
F3, D
F4) the five brachium pontis structures 3 formed.
Bidirectional switch (S described in this invention
Up, S
Vp, S
Wp, S
Un, S
Vn, S
Wn) four kinds of structures are generally arranged as shown in Figure 2.The three-phase bridge structure 1 that described two-way power switch is formed is made up of the brachium pontis of three parallel connections, and wherein each brachium pontis all is composed in series by two bidirectional switchs, and the mid point of each brachium pontis connects the three-phase input AC.
The five brachium pontis structures (3) that unidirectional power switch described in this invention is formed are made up of the brachium pontis of five parallel connections, wherein each brachium pontis comprises two power switch pipes and two anti-and diodes, and the anode of Equivalent DC bus connects the collector electrode and the first anti-also negative electrode of diode of first power switch pipe; The negative terminal of Equivalent DC bus connects the emitter and the second anti-also anode of diode of second power switch pipe; The emitter of first power switch pipe respectively with the collector electrode of second power switch pipe, the first anti-and anode of diode, the output that second negative electrode anti-and diode is connected to form this brachium pontis.As U in the five brachium pontis structures 3 of unidirectional power switch composition among Fig. 1
F+, U
F-Output connects excitation winding, a, b, the three-phase alternating current of c output behind Power Conversion.
This invention be applied in the Electric Machine Control structured flowchart as shown in Figure 3, three-phase bridge structure 1 circuit working that two-way power switch is formed obtains the intermediate dc link of equivalence under PWM rectification pattern; By the buffer circuit 2 that diode D and capacitor C are formed, be used for absorbing circuit and switch the due to voltage spikes that produces because of switch; The intermediate dc link that connects two brachium pontis utilization equivalences of excitation winding in the five brachium pontis structures 3 that single-way switch is formed provides exciting current, and three brachium pontis that connect output are operated under the PWM inverter mode, the sinusoidal voltage that output three-phase mutual deviation is 120 °.
Of the present invention is a kind of matrix converter circuit topology with DC excitation function, this topological specific implementation is, the three phase full bridge structure 1 that bidirectional switch is formed adopts suitable modulation strategy to make input and output satisfy formula (1), is obtained the direct voltage of equivalence by the positive and negative two ends of Equivalent DC bus.
Formula (1)
Two brachium pontis that connect excitation winding in the five brachium pontis structures 3 that single-way switch is formed are used to control exciting current, S when needs forward exciting current
F1, S
F4Conducting, S when the reverse exciting current of needs
F2, S
F3Conducting.By control S
F1, S
F4Conducting simultaneously or S
F2, S
F3The duty ratio D of conducting simultaneously
fThe exciting current of required amplitude of may command and direction.Formula (2) and formula (3) are satisfied in the control of the single-phase bridge structure 2 that single-way switch is formed.
U
f＝D
f×U
dc
Formula (2)
Formula (3)
Three brachium pontis that connect output in the five brachium pontis structures 3 that single-way switch is formed make its input and output satisfy formula (4) by adopting suitable modulation strategy, and the direct voltage inversion that the positive and negative two ends of Equivalent DC bus is obtained equivalence is the sinusoidal voltage of 120 ° of three-phase mutual deviations.
Formula (4)
Three brachium pontis that are connected output in the five brachium pontis structures 3 of three phase full bridge structure 1 that bidirectional switch is formed in the disclosed topology in the specification of the present invention and single-way switch composition must carry out under unified clock reference.Two brachium pontis that connect excitation winding in the five brachium pontis structures 3 that single-way switch is formed then can adopt the ring that stagnates to control or the PI control method realizes the exciting current that output is required, and its clock reference can be independent of the former.
Circuit topology proposed by the invention has saved field power supply and storage capacitor, and the solution of a kind of motor and the integrated design of power electronics is provided, and has improved the power density of system.
Claims (2)
1, a kind of dual-level matrix frequency converter with DC excitation adjusting and voltage-frequency conversion, it is characterized in that comprising two Equivalent DC buses, three-phase bridge structure (1), buffer circuit (2), five brachium pontis structures (3), three-phase bridge structure (1) wherein, buffer circuit (2), five brachium pontis structures (3) are parallel between two Equivalent DC buses successively, the three-phase input AC is electrically connected on the mid point of each brachium pontis in the three-phase bridge structure (1), there is the output of two brachium pontis to connect excitation winding in the five brachium pontis structures (3), its excess-three three-phase alternating current of brachium pontis output behind Power Conversion in the five brachium pontis structures (3).
2, the dual-level matrix frequency converter with DC excitation adjusting and voltage-frequency conversion according to claim 1, it is characterized in that described five brachium pontis structures (3) are made up of the brachium pontis of five parallel connections, wherein each brachium pontis comprises two power switch pipes and two anti-and diodes, and the anode of Equivalent DC bus connects the collector electrode and the first anti-also negative electrode of diode of first power switch pipe; The negative terminal of Equivalent DC bus connects the emitter and the second anti-also anode of diode of second power switch pipe; The emitter of first power switch pipe respectively with the collector electrode of second power switch pipe, the first anti-and anode of diode, the output that second negative electrode anti-and diode is connected to form this brachium pontis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910030725A CN101527517A (en) | 2009-04-10 | 2009-04-10 | Twin-stage type matrix converter with direct-current excitation regulation and voltage frequency transformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910030725A CN101527517A (en) | 2009-04-10 | 2009-04-10 | Twin-stage type matrix converter with direct-current excitation regulation and voltage frequency transformation |
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| Publication Number | Publication Date |
|---|---|
| CN101527517A true CN101527517A (en) | 2009-09-09 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910030725A Pending CN101527517A (en) | 2009-04-10 | 2009-04-10 | Twin-stage type matrix converter with direct-current excitation regulation and voltage frequency transformation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826720A (en) * | 2010-05-27 | 2010-09-08 | 中南大学 | Clamping absorption integrated circuit for two-stage matrix converter |
| CN102136723A (en) * | 2011-04-20 | 2011-07-27 | 南通三九焊接机器制造有限公司 | Secondary inversion peak absorption circuit |
| CN102832795A (en) * | 2012-02-03 | 2012-12-19 | 南京航空航天大学 | Two-stage three-phase four-leg matrix converter with direct-current constant-voltage output function |
| CN102931851A (en) * | 2012-11-26 | 2013-02-13 | 哈尔滨工业大学 | Three-phase-to-five-phase double-stage matrix converter based on Z source |
| CN106208735A (en) * | 2016-08-24 | 2016-12-07 | 中南大学 | The matrix converter of a kind of third-harmonic zero-sequence voltage and control method |
| CN106787811A (en) * | 2017-02-15 | 2017-05-31 | 中南大学 | A kind of single-phase electricity flow pattern AC/DC/AC converters and its modulator approach |
| CN107070253A (en) * | 2017-03-30 | 2017-08-18 | 南京航空航天大学 | A kind of Indirect Matrix Converter and its control method with direct current output function |
-
2009
- 2009-04-10 CN CN200910030725A patent/CN101527517A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826720A (en) * | 2010-05-27 | 2010-09-08 | 中南大学 | Clamping absorption integrated circuit for two-stage matrix converter |
| CN101826720B (en) * | 2010-05-27 | 2012-07-11 | 中南大学 | Clamping absorption integrated circuit for two-stage matrix converter |
| CN102136723A (en) * | 2011-04-20 | 2011-07-27 | 南通三九焊接机器制造有限公司 | Secondary inversion peak absorption circuit |
| CN102832795A (en) * | 2012-02-03 | 2012-12-19 | 南京航空航天大学 | Two-stage three-phase four-leg matrix converter with direct-current constant-voltage output function |
| CN102832795B (en) * | 2012-02-03 | 2015-02-04 | 南京航空航天大学 | Two-stage three-phase four-leg matrix converter with direct-current constant-voltage output function |
| CN102931851A (en) * | 2012-11-26 | 2013-02-13 | 哈尔滨工业大学 | Three-phase-to-five-phase double-stage matrix converter based on Z source |
| CN106208735A (en) * | 2016-08-24 | 2016-12-07 | 中南大学 | The matrix converter of a kind of third-harmonic zero-sequence voltage and control method |
| CN106787811A (en) * | 2017-02-15 | 2017-05-31 | 中南大学 | A kind of single-phase electricity flow pattern AC/DC/AC converters and its modulator approach |
| CN107070253A (en) * | 2017-03-30 | 2017-08-18 | 南京航空航天大学 | A kind of Indirect Matrix Converter and its control method with direct current output function |
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Open date: 20090909 |