CN105515405B - 18 pulse self coupling vertoro of wide scope buck - Google Patents

18 pulse self coupling vertoro of wide scope buck Download PDF

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Publication number
CN105515405B
CN105515405B CN201510736038.XA CN201510736038A CN105515405B CN 105515405 B CN105515405 B CN 105515405B CN 201510736038 A CN201510736038 A CN 201510736038A CN 105515405 B CN105515405 B CN 105515405B
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winding
phase
voltage
short
primary side
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CN105515405A (en
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牛兰
葛红娟
杨光
江帆
陈思
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/02—Auto-transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)
  • Rectifiers (AREA)

Abstract

The invention discloses a kind of wide scope buck (18) pulse self coupling vertoroes, including buck (18) pulse auto-transformer, main rectifier bridge and auxiliary rectifier bridge.Described every 6 windings of phase of buck (18) pulse auto-transformer, wherein 1 extension winding of primary side, 3 short windings, 2, secondary side winding.By rationally designing the turn ratio of every phase original vice-side winding, it is depressured using the voltage vector of former vice-side winding and the wide scope of realization input voltage, while obtaining the three-phase alternating voltage of 37 ° of three groups of phase phase differences, passes through rectifier circuit parallel output.(18) pulse self coupling vertoro Harmonics of Input that the present invention describes is small, output voltage ripple is low, and solve the problems, such as that existing (18) arteries and veins self coupling vertoro output voltage is difficult to adjust, it can be achieved that 28-280V wide-range direct current voltage exports.

Description

18 pulse self coupling vertoro of wide scope buck
Technical field
The invention belongs to field of conversion of electrical energy, refer specifically to a kind of 18 pulse self coupling vertoro of wide scope buck.
Background technique
The advantages that multiple-pulse commutation technique has structure simple, high efficient and reliable, overload capacity is strong, thus answered in aviation field With extensive.Multiple-pulse commutation technique can be divided into 12 pulses according to output voltage umber of pulse, 18 pulses, 24 pulses, 30 pulses etc., So that current on line side becomes corresponding pulses number, the staircase waveform with output voltage same-phase realizes PFC and harmonic wave Inhibit function, and how corresponding umber of pulse ac-side current THD value more be lower but transformer device structure is more complicated.Comprehensively consider net Side electric current THD value and complexity in circuits select 18 pulse transforming commutation techniques.
28V direct current may be implemented by rationally designing transformer winding structure and no-load voltage ratio in isolated multiple-pulse vertoro Output.But greatly, Harmonics of Input content is high, it is difficult to meet aerial photogrammetric target for the variation of output voltage regulation under frequency conversion input condition It is quasi-.Auto-transformer, which compares traditional isolating transformer, can be effectively reduced transformer equivalent capacity, reduce the volume of transformer And weight, while power transmission efficiency is higher.But 18 traditional pulse self coupling vertoroes are whole by bridge conversion circuit Stream output, output voltage is higher and is difficult to adjust, and is not able to satisfy the requirement of current aerospace field low-voltage DC supply system.Pass through Output voltage decompression adjusting although may be implemented for rear class cascaded buck circuit but circuit is more complicated and efficiency reduces.
Summary of the invention
The purpose of the present invention is realizing that the decompression of self coupling vertoro output voltage is adjusted, a kind of wide scope buck is provided 18 pulse self coupling vertoroes.
To achieve the above object, the scheme that the present invention uses are as follows:
A kind of 18 pulse self coupling vertoro of wide scope buck.The input voltage of the rectifier converter is by decompression 18 pulse auto-transformer reduction regulation of formula generates 3 groups of three-phase alternating voltages and connects rectifier circuit, output voltage range 28V- 280V。
The every phase of the 18 pulse auto-transformer of buck (by taking A phase as an example) totally 6 windings, primary side 1 group of extension winding, 3 A short winding (extends winding Aa, short winding a1a ', a ' b ", b " a2), the 2 short winding (c1c, cb2) in secondary side.A phase voltage source connects The head end (A) that primary side extends winding (Aa) is connect, intermediate the taking out of the secondary short winding in side (a1a, ac2) of winding ends (a) connection B phase is extended Head a, forms voltage leading-out ends (a).The 3 short winding of A phase primary side (a1a ', a ' b ", b " a2), which is linked in sequence, to be formed 2 voltages and draws Hold a ', b ", head end (a1) and end (a2).Wherein head end (a1) and end (a2) be separately connected the secondary short winding in side of B phase (a1a, Ac2) be linked in sequence the head end (a1) formed, the end (a2) that the secondary short winding in side (b1b, the ba2) sequential connection of C phase is formed.A phase is secondary The short winding in side (c1c, cb2) sequential connection forms voltage leading-out ends (c), head end (c1) and tail end (b2).Wherein head end (c1) and Tail end (b2) is separately connected the head end (c1) and B phase primary side that the short winding of C phase primary side (c1c ', c ' a ", a " c2) sequential connection is formed The tail end (b2) that short winding (b1b ', b ' c ", c " b2) is sequentially connected to form.There is common end between each phase winding but each winding flows through Electric current is different.The winding construction of B phase and C phase is similar to A phase to connection type.
The 18 pulse auto-transformer of wide scope buck is by extending winding realization to the reduction regulation of input voltage. Auto-transformer generates 3 groups of three-phase alternating voltages simultaneously, and has 37 ° of phase shift (i.e. principal voltage (V between every group of voltagea, Vb, Vc) Amplitude is that net side inputs phase voltage (VA, VB, VC) 1/b times of amplitude, boost voltage (Va′, Vb′, Vc′) and (Va″, Vb″, Vc″) electricity Pressure amplitude value is that net side inputs phase voltage (VA, VB, VC) 0.767/b times of amplitude.The phase of exit a, a ', a " differ respectively 37 °, the phase of exit b, b ', b " differ 37 ° respectively, and the phase of exit c, c ', c " differ 37 ° respectively) by taking A phase as an example, Primary side extends the number of turns N of winding (Aa)nMeet relationship with step-down ratio:If the short winding of primary side A1a ', a ' b ", b " a2 turn ratio summation is 1, then primary side extends winding (Aa) and primary side three short winding (a1a ', a ' b ", b " a2) The ratio between summation the number of turns isPrimary side three short winding (a1a ', a ' b ", b " a2) and primary side extend around The ratio between the number of turns of group (Aa) isThe 2 short winding in secondary side (c1c, Cb2) the ratio between the number of turns for extending winding (Aa) with primary side isB, C phase winding The ratio between the number of turns it is consistent with A.
Three groups of rectifier circuit parallel outputs, output voltage be three groups of input ac voltage line voltages of any time most Big value, output voltage range 28V-280V.Diode is connected according to corresponding line voltage vectors switching order in rectifier bridge, wherein Main bridge diode each period is respectively connected 80 °, and auxiliary bridge diode each cycle is respectively connected 20 °.
The utility model has the advantages that compared with the rectifier converter of existing 18 pulse auto-transformer, wide scope provided by the invention 18 pulse self coupling vertoro of buck every phase on the basis of original 18 pulse auto-transformer increase by one group of extension around Group realizes to the reduction regulation of input voltage, solves that original self coupling vertoro output voltage is higher and be difficult to adjust asks Topic.18 pulse self coupling vertoro input current of wide scope buck provided by the invention is 18 staircase waveforms, and harmonic content is small. Buck self coupling vertoro of the present invention realizes the output of 28V-280V wide-range voltage, widens vertoro application Range.
Detailed description of the invention
Attached drawing 1 is 18 pulse self coupling vertoro circuit diagram of buck；
Attached drawing 2 is auto-transformer winding technique figure；
Attached drawing 3 is auto-transformer winding construction figure；
Attached drawing 4 is auto-transformer input current waveform figure；
Attached drawing 5 is system A phase input current and voltage simulation waveform；
Attached drawing 6 is system output voltage simulation waveform；
The primary symbols in attached drawing illustrate above: VA, VB, VC--- net side three-phase input voltage, iA, iB, iC--- three-phase Input current, Nn--- primary side extends winding (by taking A phase as an example: Aa) the number of turns, NP1, Np2--- the short winding of primary side (by taking A phase as an example: A1a ' or b " a2, a ' b ") the number of turns, NS--- the secondary short winding in side (by taking A phase as an example: c1c, cb2) the number of turns, Va, Va′, Va″--- it draws Hold voltage, a, b, c, a ', b ', c ', a ", b ", c " --- voltage leading-out ends, Uo--- output voltage, Id--- output electric current is effective Value
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation Example.
Embodiment: being 18 pulse self coupling vertoro circuit diagram of buck, step-down ratio b=2, output electricity as shown in Figure 1 Press Uo=140V.18 pulse auto-transformer of buck (by taking A phase as an example) every phase primary side in the system has 1 group of extension respectively Winding, 3 short winding (extending winding Aa, short winding a1a ', a ' b ", b " a2), there is 2 short winding (c1c, cb2) on secondary side, sees figure 2.The specific connection type of winding: the head end (A) that A phase primary side extends winding (Aa) is A phase voltage input terminal, connects input voltage Source, the centre tap a connection that end (a) is formed with the secondary short winding in side (a1a, the ac2) sequential connection of B phase, forms voltage leading-out ends (a).The short winding of primary side 3 of A (a1a ', a ' b ", b " a2), which is linked in sequence, forms 2 voltage leading-out ends a ', b ", head end 3 short Be linked in sequence winding (a1a ', a ' b ", b " a2) head end (a1) formed, and end (a2) is separately connected the short winding in B phase 2, side of pair The head end (a1) that (a1a, ac2) sequential connection is formed, the end that 2 short winding (b1b, the ba2) sequential connection in the secondary side of C phase is formed (a2) end (a2).The secondary short winding in side (c1c, the cb2) sequential connection of A phase forms voltage leading-out ends (c), the secondary short winding in side (c1c, cb2) sequential connection formed head end (c1), tail end (b2) respectively with the short winding of C phase primary side (c1c ', c ' a ", a " c2) sequence The tail end (b2) that the head end (c1) formed and the short winding of B phase primary side (b1b ', b ' c ", c " b2) are sequentially connected to form is connected to be connected It connects.The connection type of B phase and C phase is similar to A phase.
Buck auto-transformer increases by one group of extension winding realization to the reduction regulation of input voltage by every phase, realizes The output of 28V-280V wide-range voltage.Between the every mutually increased extension winding of auto-transformer and its 3 short winding of every phase primary side With certain turn ratio relationship.By taking A phase as an example, if the short winding a1a ' of primary side, a ' b ", b " a2 turn ratio summation are 1, then primary side extends The ratio between winding (Aa) and primary side three short winding (a1a ', a ' b ", b " a2) summation the number of turns is 0.716: 1.Primary side extends winding (Aa) the number of turns NnMeet relationship with step-down ratio:Buck auto-transformer is every The short winding of phase primary side, the short winding in secondary side and primary side, which extend between winding, has the fixed turn ratio to realize the 3 of self coupling vertoro 37 ° of phase shifts are generated between the output of group three-phase alternating voltage and every group of voltage.Primary side three short winding (a1a ', a ' b ", b " a2) with It is 0.29875: 0.4025: 0.29875: 0.716 that primary side, which extends the ratio between the number of turns of winding (Aa),.The 2 short winding in secondary side (c1c, Cb2 the ratio between the number of turns for) extending winding (Aa) with primary side is 0.15896: 0.15896: 0.716.B, the ratio between the number of turns of C phase winding with A is consistent.According to above-mentioned connection type and turn ratio relationship, advanced 37 ° of a, b, c of the exit of exit a ', b ', c ', exit A ", b ", c " lag advanced exit a, and 37 ° of b, c.Transformer outlet voltage (Va, Va′, Va″) amplitude and net side input voltage (VA) amplitude meets following relationship: Va=0.5VA, Va′=Va"=0.3835VA。
18 pulse auto-transformer of buck forms one group of main AC-input voltage (Va, Vb, Vc), two groups of auxiliary exchange inputs Voltage (Va′, Vb′, Vc′) and (Va″, Vb″, Vc″), it is connected respectively with corresponding main rectifier bridge and auxiliary rectifier bridge.Buck p-type 18 pulse auto-transformers are asymmetric structure, and all vector voltages pass through rectifier bridge parallel output, and output voltage is to appoint Meaning time line voltage max.Diode is connected according to corresponding line voltage vectors switching order in rectifier bridge, wherein main bridge two Pole pipe each period is respectively connected 80 °, and auxiliary bridge diode each cycle is respectively connected 20 °.Buck self coupling vertoro output voltage Uo=140V.
To verify effectiveness of the invention, with 18 pulse self coupling vertoro circuit diagram of buck, step-down ratio in attached drawing 1 L-G simulation test is carried out for being 2.Fig. 2 show 18 pulse auto-transformer winding technique figure of buck, illustrates each phase winding Specific connection type and winding current flow direction.Fig. 3 show the winding construction figure of 18 arteries and veins auto-transformer of buck, and main exchange is defeated Enter voltage (Va, Vb, Vc) and two groups of auxiliary AC-input voltage (Va′, Vb′, Vc′) and (Va″, Vb″, Vc″) between have raw 37 ° of shiftings respectively Phase.Voltage magnitude relationship is by taking A phase as an example, transformer outlet voltage (Va, Va′, Va″) amplitude and net side input voltage (VA) amplitude Meet following relationship: Va=0.5VA, Va′=Va″=0.3835VA.Fig. 4 show buck 18 and buys auto-transformer input current Theoretical waveforms, it can be seen that input current is 18 staircase waveforms in figure.It is inputted in 115V/400Hz, 28V 20A purely resistive load When output, the input current waveform of Transformer Rectifier system is as shown in figure 5, input current is 18 staircase waveforms, major harmonic 17,19 Subharmonic, total harmonic distortion 8.37% meet the requirement of aviation field harmonic standard.Attached drawing 6 is DC output voltage waveform, Voltage output value is 140.43V, and voltage ripple value is 0.2087V, and voltage ripple is small, and output voltage is steady, and system is stablized.

Claims (1)

1. 18 pulse auto-transformer of wide scope buck, it is characterised in that: transformer 6 windings of every phase, wherein primary side 4 around Group, 2, secondary side winding, by taking A phase as an example, the specific connection type of winding construction and winding of the auto-transformer are as follows: primary side 4 around Group, wherein one group of extension winding Aa, winding a1a ' 3 short, a ' b ", b " a2, secondary side winding c1c, cb2 2 short, former pair side respectively around The electric current that group flows through is different, but has common end between winding, and the head end A that A phase primary side extends winding Aa is A phase voltage input terminal, even Net side input phase voltage VA is met, A phase primary side extends the end a and B phase pair short winding a1a in side of winding Aa, and ac2 is linked in sequence to be formed Centre tap a connection, be collectively formed voltage leading-out ends a, the short winding a1a ' of 3 groups of primary sides of A phase, a ' b ", b " a2 are linked in sequence Form 2 voltage leading-out ends a ', b "；The short winding a1a ' of 3 groups of primary sides, a ' b ", b " a2 the head end a1 and B phase to be formed that is linked in sequence are secondary The head end a1 that side winding a1a 2 short, ac2 are linked in sequence is connected；The short winding a1a ' of 3 groups of primary sides, a ' b ", b " a2 are linked in sequence End a2 connection C phase pair side winding b1b 2 short, the ba2 end a2 to be formed that is linked in sequence is connected；The secondary side of A phase it is 2 short around C1c is organized, cb2 is linked in sequence to form voltage leading-out ends c；The secondary short winding c1c in side, cb2 are linked in sequence to form head end c1 connection C phase original Short winding c1c ', c ' a " in side, a " c2 are linked in sequence the head end c1 to be formed；The secondary short winding c1c in side, cb2 are linked in sequence to form tail end The tail end b2 that 3 short winding b1b ', b ' c ", c " the b2 sequence of b2 and B phase primary side is connected to form is connected, the connection side of B phase and C phase Formula is similar to A phase；Auto-transformer output voltage range is 28-280V, is met between the every phase original vice-side winding of auto-transformer Certain turn ratio relationship illustrates specific turn ratio relationship by taking A phase as an example: setting primary side 3 short winding a1a ', a ' b ", b " a2 the number of turns It is 1 than summation, primary side extends the number of turns N of winding AanMeet relationship with step-down ratio b: Primary side extends the ratio between winding Aa and primary side three short winding a1a ', a ' b ", b " a2 summation the number of turnsPrimary side three short winding a1a ', a ' b ", b " a2 and primary side extend the number of turns of winding Aa The ratio between beSecondary side winding c1c, cb2 2 short With primary side extend winding Aa the ratio between the number of turns beSelf coupling becomes It is 1/b times that net side inputs phase voltage (VA, VB, VC) amplitude that depressor, which exports principal voltage (Va, Vb, Vc) amplitude, and the first output is auxiliary Voltage (Va ', Vb ', Vc ') and second is helped to export the voltage magnitude of boost voltage (Va ", Vb ", Vc ") as net side input phase voltage 0.767/b times of (VA, VB, VC) amplitude, the phase of exit a, a ', a " differ 37 ° respectively, the phase of exit b, b ', b " 37 ° are differed respectively, and the phase of exit c, c ', c " differ 37 ° respectively, and the ratio between the number of turns of B, C phase winding is consistent with A；Rectification Diode is connected according to corresponding line voltage vectors switching order in bridge, wherein main bridge diode each period is respectively connected 80 °, it is auxiliary Bridge diode each cycle is respectively connected 20 °.
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CN106953532B (en) * 2017-04-24 2019-04-02 福州大学 The improvement topology and its implementation of multiple-pulse AC/DC converter in a kind of HVDC and VFD system
CN108074719B (en) * 2017-11-28 2023-11-21 合肥华耀电子工业有限公司 18 pulse transformer
CN108551265B (en) * 2018-04-23 2020-05-22 珠海万力达电气自动化有限公司 Low-voltage power supply for single-phase to three-phase five-wire railway station based on self-coupling clamping zero-structure
CN112886833A (en) * 2021-01-18 2021-06-01 中国商用飞机有限责任公司北京民用飞机技术研究中心 18-pulse voltage transformation rectifier winding

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