CN103178720A - High-voltage matrix converter - Google Patents
High-voltage matrix converter Download PDFInfo
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- CN103178720A CN103178720A CN2013100735785A CN201310073578A CN103178720A CN 103178720 A CN103178720 A CN 103178720A CN 2013100735785 A CN2013100735785 A CN 2013100735785A CN 201310073578 A CN201310073578 A CN 201310073578A CN 103178720 A CN103178720 A CN 103178720A
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Abstract
The invention relates to a frequency converter, in particular to a high-voltage matrix converter. At present, frequency converters are high in cost, large in size, short in service life, high in output voltage harmonics and low in power factor. The high-voltage matrix converter comprises a phase shift isolation transformer, a matrix transformation unit array and a general controller, wherein the phase shift isolation transformer is provided with 3n three-phase secondary windings, and the matrix transformation array is of array structure formed by arranging 3n matrix transformation units in a mode that 3 rows time n lines. In the matrix transformation unit array, power output ends of the matrix transformation units of each row are serially connected, each matrix transformation unit is composed of an input filter, a power switch array and sub-controllers. Power wires of the sub-controllers are connected with any two or three phases in input ends of preceding-stage three-phase bridge rectifying circuits in the power switch arrays, and signal wires of the sub-controllers are connected with the power switch arrays. The high-voltage matrix converter is low in cost, small in size, long in service life and easy to realize energy feedback, and the frequency converters are safe and stable in operation and low in cost.
Description
Technical field
The present invention relates to a kind of frequency converter.
Background technology
Along with power electronic technology, control technology growing, ac variable frequency speed regulation also is more and more widely used.AC variable-frequency speed regulation system is divided by principle can be divided into ac-dc-ac inverter system and AC-AC frequency conversion system.The ac-dc-ac inverter system can be divided into three level again by level, five level and many level, and these three kinds of topological structures have intermediate dc energy storage link, thereby cost is high, and volume is large, and the life-span is short.And traditional AC-AC frequency conversion system works in phased approach usually, and its harmonic wave of output voltage is serious, and power factor (PF) is low, and output frequency should not be higher than half of input voltage frequency.
Matrix converter is a kind of novel ac-ac frequency converter, and it is widely used in low voltage frequency converter, proposes the stage but only limit to concept at high voltage converter, there is no actual product and promotes.Publication number is the frequency converter topological structure that the Chinese patent " handing over the medium voltage frequency converter of Direct Transform " of CN102185490A has proposed a kind of friendship Direct Transform, can realize the Direct Conversion of AC to AC, but it need to boost and step-down transformer, has increased volume and cost.Publication number is that the Chinese patent " topological structure of high voltage converter is handed over-handed over to a kind of matrix form " of CN102545644 proposes the alternative traditional bidirectional switch of a plurality of H bridge power unit series connection, has the risk of dc-side short-circuit between the unit, controls difficulty high.Publication number is that the matrix converter that the Chinese patent " cascade multiple indirect matrix converter " of CN1988353A proposes comprises total input filter, phase shifting transformer, matrixing cell array and master controller, its matrixing unit comprises again input filter and switch arrays, total input filter is the hv filtering device, bulky, cost is high again, and the switch of its matrixing unit is also to adopt bidirectional switch or inverse-impedance type switch, controls very complicated.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition is that the prior art scheme is improved and improved, a kind of new a kind of high-pressure matrix transformer configuration is proposed, by to the optimization of matrixing unit input filter and the utilization of the impedance of phase shifting transformer own, add the phase-shift PWM technology, needn't just can the control inputs current harmonics at high pressure front-end configuration input filter.For this reason, the present invention takes following technical scheme.
A kind of high-pressure matrix converter, comprise phase shift isolating transformer, matrixing cell array and master controller, the phase shift isolating transformer has 3n three-phase secondary winding, n is natural number, every 3 secondary winding are one group and have identical phase place, secondary winding group phase place increases progressively successively, and initial phase is 0 °, adjacent between phase difference be the 60/n degree; The three-phase high-voltage alternating current is by the multiple array isolation low-voltage three-phase AC electricity of phase shift isolated variable depressor output 3, be the power supply of converter unit array, transducer array is lined up the capable array structure of 3 row * n by 3n matrixing unit and is consisted of, phase shift isolating transformer secondary winding group respectively with transducer array in capable corresponding, three secondary winding in every group respectively with every row in three converter units corresponding being connected one by one; In the matrixing cell array, the power take-off of each column matrix converter unit is connected successively, form all adjustable alternating voltage output of a phase frequency amplitude, obtain simultaneously the output voltage capability of stack, three rank transformation unit outputs adopt the Y connection to form three-phase alternating voltage output, and each converter unit is connected with master controller by signal optical fibre respectively; The matrixing unit is comprised of input filter, power switch array and sub-controller, between the input of described input filter by the secondary winding that is serially connected in the phase shift isolating transformer and power switch array, the high-frequency current harmonic components that produces due to switch motion in the internal impedance of the multiplex phase shifting transformer of input side and input filter acting in conjunction filtering input current, reduce the high-frequency harmonic of input power side is polluted, and improve input power factor.Any two-phase or three-phase in the input of the prime three-phase bridge rectifier circuit in sub-controller power line and power switch array are connected, simultaneously the sub-controller holding wire functions such as realizing detection, protection, driving that is connected with the power switch array.Secondary winding group phase place increases progressively successively.
Matrix converter in the technical program is friendship-knot structure, without middle energy storage link, compares existing unit cascaded type high voltage transducer power unit ac-dc-ac frequency converter, has that cost is low, volume is little, the advantage that the life-span is long.And the matrix converter input can two-wayly be controlled, thereby energy capable of bidirectional flowing, is easy to realize energy back, but motor four quadrant running; The phase shift isolating transformer plays the step-down buffer action, avoids classical matrix converter DC loop short-circuit risks, makes frequency converter work safety, stable.The phase-shift PWM Techniques For Reducing Harmonics of Input and harmonic wave of output voltage, working stability, reliable.
As the further of technique scheme improved and replenish, the present invention also comprises following additional technical feature.
according to claim 1, the power switch array is made of prime three-phase bridge rectifier circuit and rear class single-phase inversion circuit, the prime rectification circuit is the 3H bridge construction, each brachium pontis is connected in series by two unidirectional gate-controlled switches with anti-paralleled diode and consists of, sub-controller carries out sampled voltage and voltage over zero to input line voltage judges that thereby input voltage residing sector controls respectively unidirectional gate-controlled switch action, be fed back to electrical network by the real-time instantaneous reactive power with load of electric current two-way flow characteristic with the unidirectional gate-controlled switch of anti-paralleled diode, saved jumbo dc bus storage capacitor.rear class single-phase inversion 2H structural circuit, each brachium pontis is also to be connected in series by two unidirectional gate-controlled switches with anti-paralleled diode to consist of, master controller is realized many level phase shift SPWM by the unidirectional gate-controlled switch of the rear class single-phase inversion 2H circuit of gating matrix converter unit array, the fundamental voltage of same group of matrixing unit identical amplitude of output and phase place, but the 120o electrical degree staggers mutually between the carrier wave of each unit of connecting, the voltage of stack output approaches sinusoidal wave very much. be equivalent to the output switch frequency very high, and the output level number increases, can greatly improve output waveform, reduce output harmonic wave, harmonic wave of output voltage content is lower than 3%.
According to claim 1, the power switch array is characterized in that: the power switch array comprises six bidirectional switchs, and every input mutually is connected with output by two bidirectional switchs respectively, realizes three-phase alternating current output by controlling six bidirectional switchs.
Beneficial effect: 1, the matrix converter in the technical program is friendship-knot structure, without middle energy storage link, compares existing unit cascaded type high voltage transducer power unit ac-dc-ac frequency converter, has that cost is low, volume is little, the advantage that the life-span is long.2, the matrix converter input can two-wayly be controlled, thereby energy capable of bidirectional flowing, is easy to realize energy back, but the motor four quadrant running.3, the phase shift isolating transformer plays the step-down buffer action, avoids classical matrix converter DC loop short-circuit risks, makes frequency converter work safety, stable.4, the phase-shift PWM Techniques For Reducing Harmonics of Input and harmonic wave of output voltage, working stability, reliable needn't just can the control inputs current harmonics at high pressure front-end configuration input filter, minimizing equipment further reduces costs.
Description of drawings
Fig. 1 is circuit theory reason figure of the present invention.
Fig. 2 is matrixing element circuit schematic diagram of the present invention.
Fig. 3 is the another kind of circuit theory diagrams of matrixing unit in the present invention.
In figure: 1-phase shift isolating transformer; 2-matrixing cell array; The 3-master controller; 4-matrixing unit; The 5-input filter; The 6-switch arrays; The 7-sub-controller.
Embodiment
Below in conjunction with Figure of description, technical scheme of the present invention is described in further detail.
Embodiment one:
As shown in Figure 1, the high-pressure matrix converter comprises 1 phase shift isolating transformer 1, a matrixing cell array 2 and a master controller 3.Phase shift isolating transformer 1 has 15 three-phase secondary winding, and every 3 secondary winding are one group and have identical phase place, and secondary winding group phase place increases progressively successively, and initial phase is 0 °, adjacent between phase difference be 12 degree; The three-phase high-voltage alternating current is by 15 groups of isolation low-voltage three-phase AC electricity of phase shift isolated variable depressor 1 output, be 2 power supplies of converter unit array, the array structures that transducer array 2 is lined up 3 row * 5 row by 15 matrixing unit consist of, phase shift isolating transformer 1 secondary winding group respectively with transducer array 2 in capable corresponding, three secondary winding in every group respectively with every row in three converter units corresponding being connected one by one; In matrixing cell array 2, the power take-off of each column matrix converter unit 4 is connected successively, form all adjustable alternating voltage output of a phase frequency amplitude, obtain simultaneously the output voltage capability of stack, three rank transformation unit outputs adopt the Y connection to form three-phase alternating voltage output, and each converter unit is connected with master controller by signal optical fibre respectively; As shown in Figure 2, matrixing unit 4 is comprised of input filter 5, power switch array 6 and sub-controller 7, described input filter 5 is made of three filter resistance R1, R2, R3, three filter capacitor C1, C2, C3, three filter resistance R1, R2, R3 one ends are connected with the input of power switch array 6 respectively, the other end is connected with the end of three filter capacitor C1, C2, C3 respectively, and the other end of three filter capacitor C1, C2, C3 interconnects; Any two-phase or three-phase in the input of the prime three-phase bridge rectifier circuit in described sub-controller 7 power lines and power switch array 6 are connected, simultaneously the sub-controller 7 holding wires functions such as realizing detection, protection, driving that is connected with power switch array 6; Any two-phase or three-phase in the input of the prime three-phase bridge rectifier circuit in sub-controller power line and power switch array are connected, simultaneously the sub-controller holding wire functions such as realizing detection, protection, driving that is connected with the power switch array.
the power switch array is made of prime three-phase bridge rectifier circuit and rear class single-phase inversion circuit, the prime rectification circuit is the 3H bridge construction, each brachium pontis is connected in series by two unidirectional gate-controlled switches with anti-paralleled diode and consists of, sub-controller carries out sampled voltage and voltage over zero to input line voltage judges that thereby input voltage residing sector controls respectively unidirectional gate-controlled switch action, be fed back to electrical network by the real-time instantaneous reactive power with load of electric current two-way flow characteristic with the unidirectional gate-controlled switch of anti-paralleled diode, saved jumbo dc bus storage capacitor.Rear class single-phase inversion 2H structural circuit, each brachium pontis is also to be connected in series by two unidirectional gate-controlled switches with anti-paralleled diode to consist of, master controller is realized many level phase shift SPWM by the unidirectional gate-controlled switch of the rear class single-phase inversion 2H circuit of gating matrix converter unit array, the fundamental voltage of same group of matrixing unit identical amplitude of output and phase place, but the 120o electrical degree that staggers mutually between the carrier wave of each unit of connecting.
Embodiment two:
Be the part of the power switch array 6 of matrixing unit 4 with embodiment one difference, as shown in Figure 3, power switch array 6 comprises six bidirectional switch S11, S12, S13, S14, S15, S16, every input mutually is connected with output by two bidirectional switchs respectively, realizes three-phase alternating current output by controlling six bidirectional switch S11, S12, S13, S14, S15, S16.。
The above is only instantiation of the present invention, does not limit protection scope of the present invention with this.Add any type of absorption filter at the front and back inter-stage of the power switch array 6 of above-mentioned matrixing unit and be expanded range of the present invention; any equivalent transformation that those skilled in the art do based on technical solution of the present invention is within all belonging to protection scope of the present invention.
Claims (3)
1. high-pressure matrix converter, it is characterized in that comprising phase shift isolating transformer (1), matrixing cell array (2) and master controller (3), described phase shift isolating transformer (1) has 3n three-phase secondary winding, n is natural number, every 3 secondary winding are one group, and the phase place of secondary winding on the same group is identical, and secondary winding group phase place increases progressively successively, initial phase is 0 °, and between adjacent secondary winding, phase difference is the 60/n degree; Described transducer array (2) is lined up the capable array structure of 3 row * n by 3n matrixing unit (4) and is consisted of, phase shift isolating transformer (1) secondary winding group respectively with transducer array (2) in capable corresponding, three secondary winding in every group respectively with every row in three converter units corresponding being connected one by one; In matrixing cell array (2), the power take-off of each column matrix converter unit is connected successively, form a cross streams Voltage-output, three rank transformation unit outputs adopt the Y connection to form three-phase alternating voltage output, and each converter unit is connected with master controller (3) by signal optical fibre respectively; Described matrixing unit (4) is comprised of input filter (5), power switch array (6) and sub-controller (7), described input filter (5) is made of three filter resistances (R1, R2, R3), three filter capacitors (C1, C2, C3), three filter resistances (R1, R2, R3) end is connected with the input of power switch array (6) respectively, the other end is connected with an end of three filter capacitors (C1, C2, C3) respectively, and the other end of three filter capacitors (C1, C2, C3) interconnects; Any two-phase or three-phase in the input of the prime three-phase bridge rectifier circuit in described sub-controller (7) power line and power switch array (6) are connected, simultaneously sub-controller (7) holding wire be connected with power switch array (6) realize detecting, protect, driving.
2. a kind of high-pressure matrix converter according to claim 1, it is characterized in that: described power switch array (6) is made of prime three-phase bridge rectifier circuit and rear class single-phase inversion circuit, the prime rectification circuit is the 3H bridge construction, two unidirectional gate-controlled switch (S1 with anti-paralleled diode, S4) be connected in series first brachium pontis of formation, two unidirectional gate-controlled switch (S2 with anti-paralleled diode, S5) be connected in series second brachium pontis of formation, two unidirectional gate-controlled switch (S3 with anti-paralleled diode, S6) be connected in series the 3rd brachium pontis of formation, the one the second three brachium pontis mid points are connected with the output of filter inductance in input filter (5) respectively, rear class single-phase inversion circuit is the 2H bridge construction, two unidirectional gate-controlled switch (S7 with anti-paralleled diode, S9) be connected in series the 5th brachium pontis of formation, another two unidirectional gate-controlled switch (S8 with anti-paralleled diode, S10) be connected in series the 6th brachium pontis of formation, the 5th, the mid point of the 6th liang of brachium pontis forms two ac output end (a1, a2), the 5th, the upper end of the 6th liang of brachium pontis is connected with the upper end of prime rectification circuit 3H bridge, the 5th, the lower end of the 6th liang of brachium pontis is connected with the lower end of prime rectification circuit 3H bridge.
3. a kind of high-pressure matrix converter according to claim 1, it is characterized in that: power switch array (6) comprises six bidirectional switchs (S11, S12, S13, S14, S15, S16), every input mutually is connected with output by two bidirectional switchs respectively, realizes three-phase alternating current output by controlling six bidirectional switchs (S11, S12, S13, S14, S15, S16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100735785A CN103178720A (en) | 2013-03-08 | 2013-03-08 | High-voltage matrix converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100735785A CN103178720A (en) | 2013-03-08 | 2013-03-08 | High-voltage matrix converter |
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| CN103178720A true CN103178720A (en) | 2013-06-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956912A (en) * | 2014-05-15 | 2014-07-30 | 西安利雅得电气股份有限公司 | Direct series-connection three-phase matrix type middle-high voltage frequency converter |
| CN104821731A (en) * | 2014-02-03 | 2015-08-05 | 株式会社安川电机 | Multi-stage series matrix converter and motor drive device |
| CN105991041A (en) * | 2015-02-27 | 2016-10-05 | 乐金电子研发中心(上海)有限公司 | Indirect matrix converter |
| CN107888079A (en) * | 2016-09-27 | 2018-04-06 | 罗克韦尔自动化技术公司 | Multi-phase multi-level electric power coversion system, controller and computer-readable medium |
| CN112186771A (en) * | 2020-10-09 | 2021-01-05 | 北京航空航天大学 | Electric energy router based on matrix converter and electric energy routing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5790357A (en) * | 1994-05-03 | 1998-08-04 | Siemens Aktiengesellschaft | Differential current protection for a transformer |
| CN1738172A (en) * | 2005-05-27 | 2006-02-22 | 广州智光电力电子有限公司 | Matrix type middle, high voltage variable-frequency power supply |
| CN203278663U (en) * | 2013-03-08 | 2013-11-06 | 卧龙电气集团股份有限公司 | High-voltage matrix converter |
-
2013
- 2013-03-08 CN CN2013100735785A patent/CN103178720A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5790357A (en) * | 1994-05-03 | 1998-08-04 | Siemens Aktiengesellschaft | Differential current protection for a transformer |
| CN1738172A (en) * | 2005-05-27 | 2006-02-22 | 广州智光电力电子有限公司 | Matrix type middle, high voltage variable-frequency power supply |
| CN203278663U (en) * | 2013-03-08 | 2013-11-06 | 卧龙电气集团股份有限公司 | High-voltage matrix converter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821731A (en) * | 2014-02-03 | 2015-08-05 | 株式会社安川电机 | Multi-stage series matrix converter and motor drive device |
| CN103956912A (en) * | 2014-05-15 | 2014-07-30 | 西安利雅得电气股份有限公司 | Direct series-connection three-phase matrix type middle-high voltage frequency converter |
| CN103956912B (en) * | 2014-05-15 | 2016-08-17 | 西安利雅得电气股份有限公司 | A kind of directly series connection three-phase matrix form medium-high voltage frequency converter |
| CN105991041A (en) * | 2015-02-27 | 2016-10-05 | 乐金电子研发中心(上海)有限公司 | Indirect matrix converter |
| CN107888079A (en) * | 2016-09-27 | 2018-04-06 | 罗克韦尔自动化技术公司 | Multi-phase multi-level electric power coversion system, controller and computer-readable medium |
| CN112186771A (en) * | 2020-10-09 | 2021-01-05 | 北京航空航天大学 | Electric energy router based on matrix converter and electric energy routing method |
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Application publication date: 20130626 |