CN103368411A - Multi-phase variable-frequency power source - Google Patents

Multi-phase variable-frequency power source Download PDF

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Publication number
CN103368411A
CN103368411A CN2013103153396A CN201310315339A CN103368411A CN 103368411 A CN103368411 A CN 103368411A CN 2013103153396 A CN2013103153396 A CN 2013103153396A CN 201310315339 A CN201310315339 A CN 201310315339A CN 103368411 A CN103368411 A CN 103368411A
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CN
China
Prior art keywords
phase
power
circuit
circuits
power source
Prior art date
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Pending
Application number
CN2013103153396A
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Chinese (zh)
Inventor
陈敏
李瑞来
尹彭飞
张向阳
杜秀虹
张健美
张天宝
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Shandong Xinfeng Photoelectric Science & Technology Development Co Ltd
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Shandong Xinfeng Photoelectric Science & Technology Development Co Ltd
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Application filed by Shandong Xinfeng Photoelectric Science & Technology Development Co Ltd filed Critical Shandong Xinfeng Photoelectric Science & Technology Development Co Ltd
Priority to CN2013103153396A priority Critical patent/CN103368411A/en
Publication of CN103368411A publication Critical patent/CN103368411A/en
Pending legal-status Critical Current

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Abstract

The invention provides a multi-phase variable-frequency power source. The multi-phase variable-frequency power source comprises a self-coupling transformer and multiple power module units for realizing a frequency conversion effect, wherein one primary side of the self-coupling transformer is a three-phase winding connected with a power grid, a secondary side of the self-coupling transformer is provided with two three-phase windings, each power module unit comprises three groups of circuits, each group of circuits comprise two three-phase full-wave rectifier circuits which are in anti-parallel, the same-phase ends of outputs of the three groups of circuits are connected with one another, bridge arms of the three-phase full-wave rectifier circuits are controllable power devices, one primary side of the self-coupling transformer is connected with the first group of circuits of the power module units, and the two three-phase windings of the secondary side of the self-coupling transformer are connected with the second groups of circuits and the third group of circuits of the power module units. The multi-phase variable-frequency power source has the advantages that the frequency conversion and inversion are effectively realized, and the bidirectional flow of energy is realized; the variable-frequency power source with different phase numbers is obtained by increasing and decreasing the number of the power module units; a unidirectional silicon controlled rectifier is adopted, so that the circuit topology structure of a full-controlled device is changed, the manufacturing cost is greatly reduced, and the efficiency is improved; and the losses are reduced during frequency conversion due to the adoption of the silicon controlled rectifier, and the multi-phase variable-frequency power source is concise and reasonable in technological structure, low in cost and high in efficiency.

Description

A kind of heterogeneous variable frequency power supply
Technical field
The present invention relates to a kind of heterogeneous variable frequency power supply, belong to heterogeneous variable frequency power supply power supply, electric and electronic technical field, particularly polyphase machine frequency conversion drive and variable frequency power supply.
Background technology
Development along with modern Semiconductor Converting Technology, new technology is widely used in industrial equipment, remarkable energy-saving effect, the handled easily that converter technique has and be convenient to the advantages such as installation and maintenance, but because working condition differs greatly, such as the explosion-proof frequency converter under the colliery, its cooling system has accounted for sizable proportion aspect cost, if loss that can the decrease frequency conversion, simplify as much as possible heat dissipation design, cost is obviously descended, simultaneously convenient the use.The loss of the frequency converter that the power device IGBT of common usefulness does will be about 2-3%, and it is more very difficult loss being reduced to below 1%, otherwise cost will significantly rise and could arrive.
Summary of the invention
The objective of the invention is the deficiency for the prior art existence, provide a kind of and formed heterogeneous variable frequency power supply by the power model unit.
The objective of the invention is to realize by following technological means: comprise single-circuit transformer, the power model unit of a plurality of realization frequency conversion effects, three phase windings of the primary side of single-circuit transformer for being connected with electrical network, secondary side has two three phase windings, each power model unit comprises three groups of circuit, every group of circuit is made of the three-phase full wave rectifier circuit of two reverse parallel connections, the in-phase end of three groups of circuit outputs links to each other, the brachium pontis of three-phase full wave rectifier circuit is the controlled power device, the primary side of single-circuit transformer connects first group of circuit of power model unit, and two three phase windings of secondary side connect second group of power model unit, the 3rd group of circuit.
Single-circuit transformer can with the power delivery on the first side winding in the power cell of secondary side, have been realized the transmission of energy.Also can realize the energy of power cell is transferred to primary side by secondary side winding, then be transferred to electrical network.The input of power model unit, output are connected with secondary winding, the load of transformer respectively, realize the function of frequency conversion.Secondary side at transformer is in the situation of two three phase windings, and each of secondary side three phase windings all match with a three phase full bridge rectification in each power cell; Each power model unit all has the controlled full-wave rectification brachium pontis of three groups of three-phases to consist of.
Power device in each power model unit is half control type power semiconductor switch, and half control type power semiconductor switch is controlled unidirectional thyristor.Existing frequency changing power device, what adopt in the power model unit all is the full-control type device, it is not only expensive, and generally also necessary import, is difficult for buying, and can not realize two-way energy flow simultaneously; The present invention adopts unidirectional thyristor as half control type power semiconductor switch, and not only price is low, and is domestics, greatly reduces manufacturing cost, is convenient to large-scale promotion.The full-control type power semiconductor is IGCT, IGBT, MCT or GTO power device.
Between three phase windings of two three phase windings of the secondary side of transformer and primary side, differ successively 20 angle, house transformer is single-circuit transformer simultaneously, can significantly reduce volume, weight and the cost of transformer behind the employing single-circuit transformer, the capacity of transformer only has about 20% of total capacity.
Guaranteeing between the secondary side winding of single-circuit transformer and the phase difference between secondary side winding and the first side winding, is the requirement of making transformer.
Compared with prior art the present invention has following obvious advantage: export by some power models unit is set (1), and the secondary side of single-circuit transformer is arranged two three phase windings, has effectively realized frequency conversion and inversion, has realized the two-way flow of energy; By the number of increase and decrease power model unit, realize the variable frequency power supply to the different numbers of phases.(2) the half control type power semiconductor switch in the power model unit adopts unidirectional thyristor, has changed the circuit topological structure that in the past adopts the full-control type device, greatly reduces cost of manufacture, has improved efficient.(3) the power model unit has saved the intermediate dc link, loss when having adopted thyristor to reduce frequency conversion, heterogeneous frequency changing power device has advantages of that process structure is succinct rationally, cost is low, efficient is high, electrical network had less voltage harmonic and higher power factor, meeting the market requirement, easy to utilize.
Description of drawings
Fig. 1 is circuit system block diagram of the present invention;
Fig. 2 is the circuit diagram of power model of the present invention unit;
Fig. 3 is single-circuit transformer circuit diagram among the present invention;
Among the figure, ua11, ub11, uc11, ua21, ub21, uc21, ua31, ub31, uc31-input, B1, B2, B3, B4, B5, B6-three-phase full-wave controlled rectification circuit, V11, V12, V21, V22, VN1, VN2-output.
Embodiment
The present invention is described in further detail below in conjunction with description of drawings and embodiment.
As shown in Figure 1, provided the circuit system block diagram of heterogeneous variable frequency power supply of the present invention, power model unit 1, power model unit 2 ..., power model unit n input be connected with three phase windings of single-circuit transformer primary side and 2 three phase windings of secondary side respectively, so so that be parallel form between the input of each power model unit.Output V11, the V12 of power model unit, V21, V22 ... as the output of N phase, three phase winding UA of the primary side of single-circuit transformer, UB, UC form total input, are incorporated on the electrical network respectively for VN1, VN2.Primary side UA, the UB of single-circuit transformer, UC are connected with 9 input ua11, ub11, uc11, ua21, ub21, uc21, ua31, ub31, uc31 of power cell respectively with UA1, UB1, UC1, UA2, UB2, the UC2 of 2 three phase windings of the secondary side of single-circuit transformer, and 9 terminals of the input of N power cell are connected in parallel respectively.By the number of increase and decrease power model unit, can realize the variable frequency power supply of the different numbers of phases.
As shown in Figure 2, provided the circuit diagram of the power model unit of the heterogeneous frequency changing power device of the present invention.Shown power model unit is by totally 6 groups of three-phase full-wave controlled rectification circuit B1, B2, B3, B4, B5, B6 form; Three-phase full-wave controlled rectification circuit B1 and three-phase full-wave controlled rectification circuit B2 oppositely are in parallel, and the input three-phase of three-phase full-wave controlled rectification circuit B1 and three-phase full-wave controlled rectification circuit B2 is in parallel respectively as input ua11, ub11, uc11.Three-phase full-wave controlled rectification circuit B3 and three-phase full-wave controlled rectification circuit B4 oppositely are in parallel, the input three-phase of three-phase full-wave controlled rectification circuit B3 and three-phase full-wave controlled rectification circuit B4 is in parallel respectively as input ua21, ub21, uc11, three-phase full-wave controlled rectification circuit B5 and three-phase full-wave controlled rectification circuit B6 oppositely are in parallel, and the input three-phase of three-phase full-wave controlled rectification circuit B5 and three-phase full-wave controlled rectification circuit B6 is in parallel respectively as input ua31, ub31, uc31.。The positive pole of three-phase full-wave controlled rectification circuit B1 is as the output V11 of power cell, the negative pole of three-phase full-wave controlled rectification circuit B1 is as the output V12 of power cell, the positive pole of three-phase full-wave controlled rectification circuit B1, B3, B5 carries out parallel connection as output V11, and the negative pole of three-phase full-wave controlled rectification circuit B1, B3, B5 carries out parallel connection as output V12.
Fig. 3 is the single-circuit transformer circuit diagram in apparatus of the present invention.The three-phase voltage of electrical network input is UA, UB, UC, mutual deviation 120 degree between the three-phase.Extract a UA1 and UC2 in the winding between UA and UC out, extract a UB2 and UC1 in the winding between UB and UC out, extract a UB1 and UA2 in the winding between UA and UB out, wherein mutual deviation 120 is spent between UA1, UB1, the UC1, mutual deviation 120 degree between UA2, UB2, the UC2 three-phase, UA1 hysteresis UA phase angle 20 degree, the leading UA of UA2 phase angle 20 degree, UB1 hysteresis UB phase angle 20 degree, the leading UB of UB2 phase angle 20 degree, UC1 hysteresis UC phase angle 20 degree, the leading UC of UC2 phase angle 20 degree.
Adopt in the present invention single-circuit transformer to split and obtain mutually 9 power supplys, can significantly reduce volume, weight and the cost of transformer, its capacity only has about 20% of total capacity, and the utilance of winding is all very high.
The above; only be a part of embodiment of the present invention, protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (4)

1. heterogeneous frequency changing power device, comprise single-circuit transformer, the power model unit of a plurality of realization frequency conversion effects, three phase windings of the primary side of described single-circuit transformer for being connected with electrical network, secondary side has two three phase windings, it is characterized in that: each described power model unit comprises three groups of circuit, every group of circuit is made of the three-phase full wave rectifier circuit of two reverse parallel connections, the in-phase end of described three groups of circuit output links to each other, the brachium pontis of described three-phase full wave rectifier circuit is the controlled power device, the primary side of described single-circuit transformer connects first group of circuit of described power model unit, and two three phase windings of described secondary side connect second group of described power model unit, the 3rd group of circuit.
2. heterogeneous frequency changing power device according to claim 1, it is characterized in that: described power device is half control type power semiconductor switch.
3. heterogeneous frequency changing power device according to claim 2, it is characterized in that: described half control type power semiconductor switch is controlled unidirectional thyristor.
4. heterogeneous frequency changing power device according to claim 1 is characterized in that: the phase angle that differs successively 20 degree between two three phase windings of described secondary side and three phase windings of described primary side.
CN2013103153396A 2013-07-24 2013-07-24 Multi-phase variable-frequency power source Pending CN103368411A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104635095A (en) * 2015-03-11 2015-05-20 上海金智晟东电力科技有限公司 Testing system of feeder line automatic system
CN110677097A (en) * 2019-09-10 2020-01-10 中国东方电气集团有限公司 Bidirectional frequency converter device for high-capacity high-frequency multiphase motor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1362780A (en) * 2001-01-08 2002-08-07 张东胜 Ac-to-AC high-voltage power converting and conversion method
US7375996B2 (en) * 2005-09-09 2008-05-20 Indian Institute Of Technology, Delhi-Department Of Electrical Engineering Reduced rating T-connected autotransformer for converting three phase AC voltages to nine/six phase shifted AC voltages
CN101459385A (en) * 2007-12-12 2009-06-17 张东胜 Hybrid type current transformer device
CN103051212A (en) * 2011-10-12 2013-04-17 霍尼韦尔国际公司 Composite ac-to-dc power converter using midpoint method
US20130181643A1 (en) * 2012-01-18 2013-07-18 Hamilton Sundstrand Corporation Power converter with asymmetric phase shift autotransformer for alternating current (ac) motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1362780A (en) * 2001-01-08 2002-08-07 张东胜 Ac-to-AC high-voltage power converting and conversion method
US7375996B2 (en) * 2005-09-09 2008-05-20 Indian Institute Of Technology, Delhi-Department Of Electrical Engineering Reduced rating T-connected autotransformer for converting three phase AC voltages to nine/six phase shifted AC voltages
CN101459385A (en) * 2007-12-12 2009-06-17 张东胜 Hybrid type current transformer device
CN103051212A (en) * 2011-10-12 2013-04-17 霍尼韦尔国际公司 Composite ac-to-dc power converter using midpoint method
US20130181643A1 (en) * 2012-01-18 2013-07-18 Hamilton Sundstrand Corporation Power converter with asymmetric phase shift autotransformer for alternating current (ac) motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104635095A (en) * 2015-03-11 2015-05-20 上海金智晟东电力科技有限公司 Testing system of feeder line automatic system
CN110677097A (en) * 2019-09-10 2020-01-10 中国东方电气集团有限公司 Bidirectional frequency converter device for high-capacity high-frequency multiphase motor

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Application publication date: 20131023

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