CN102013814A - Single quadrant high-pressure frequency converter topology structure without transformer - Google Patents

Single quadrant high-pressure frequency converter topology structure without transformer Download PDF

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Publication number
CN102013814A
CN102013814A CN2010102336930A CN201010233693A CN102013814A CN 102013814 A CN102013814 A CN 102013814A CN 2010102336930 A CN2010102336930 A CN 2010102336930A CN 201010233693 A CN201010233693 A CN 201010233693A CN 102013814 A CN102013814 A CN 102013814A
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CN
China
Prior art keywords
circuit
rectification
inverter circuit
voltage converter
high voltage
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010102336930A
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Chinese (zh)
Inventor
左强
张其生
李旷
赵淑玉
王振
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Rongxin Power Electronic Co Ltd
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Rongxin Power Electronic Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rongxin Power Electronic Co Ltd filed Critical Rongxin Power Electronic Co Ltd
Priority to CN2010102336930A priority Critical patent/CN102013814A/en
Publication of CN102013814A publication Critical patent/CN102013814A/en
Priority to PCT/CN2011/077136 priority patent/WO2012010065A1/en
Pending legal-status Critical Current

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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
    • 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
    • H02M5/40—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 with intermediate conversion into dc
    • H02M5/42—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 with intermediate conversion into dc by static converters
    • H02M5/44—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The present invention relates to a single quadrant high-pressure frequency converter topology structure without the transformer, which comprises LC filter circuit, high-pressure charging loop, rectification circuit and inversion circuit. After being filtered through LC filter circuit, high-pressure electrical network signal penetrates into rectification circuit through high-pressure charging loop. The rectification circuit is a three-phase uncontrollable rectification system composed in series by several diodes; direct voltage after rectification is used as DC source; inversion circuit is composed in series by several power units. Inversion circuit output terminal has inductance. The power unit of the inversion circuit has half-bridge structure or H-bridge structure. The topology structure makes a single quadrant high-pressure frequency converter perform high-pressure frequency conversion without the transformer; the high-pressure frequency converter using the topology structure can significantly reduce the integral body volume and cost of high-pressure frequency converter, so said high-pressure converter is of great competitiveness in the market.

Description

A kind of transformerless single quadrant high voltage converter topological structure
Technical field
The present invention relates to a kind of single quadrant high voltage converter topology, particularly a kind of transformerless single quadrant high voltage converter topological structure.
Background technology
Along with the development of electric drive technology, the especially development of variable-frequency control technique has also obtained using widely as the high-voltage frequency conversion and speed-adjusting technology of big capacity transmission.Characteristics such as high voltage converter is energy-efficient with it, High Power Factor and high reliability, the energy that the conventional method that is through with causes and manpower waste, useful lifes such as motor, blower fan, water pump have been prolonged, improved production technology, improved production efficiency, be used widely in industries such as iron and steel, oil, coal, running water, electric power.
At present, the market of high voltage converter develops rapidly, and it is very fierce especially to compete.Under equal conditions, cost is low, the little high voltage converter of volume will have absolute market competitiveness advantage undoubtedly, brings huge interests to enterprise.
Present high voltage converter, integral body all are made up of control cubicle, transformer case, power cabinet.
Wherein, transformer case has occupied the cost and the volume of very big proportion in whole high voltage converter system, and the big more high voltage converter of capacity, and its capacity requirement to transformer is also high more, and the cost that makes high voltage converter so also straight line rises.
Summary of the invention
The purpose of this invention is to provide a kind of transformerless single quadrant high voltage converter topological structure, this topological structure makes single quadrant high voltage converter need not the purpose that transformer can be realized high-pressure frequency-conversion; Use the high voltage converter of this kind topological structure can significantly reduce the overall volume and the cost of high voltage converter, have absolute market competitiveness advantage.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of transformerless single quadrant high voltage converter topological structure, comprise LC filter circuit, high-voltage charging loop, rectification circuit, inverter circuit, after the high-voltage fence signal carries out filtering by the LC filter circuit, enter rectification circuit through the high-voltage charging loop, rectification circuit is composed in series the uncontrollable commutation system of three-phase by a plurality of diodes; Direct voltage after rectification is as the DC power supply of inverter circuit, and inverter circuit is made up of a plurality of power unit cascades, and the inverter circuit output is connected to inductance.
The power cell of described inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
The power cell of described inverter circuit is the H bridge construction that four IGBT switching devices are formed.
Rectification circuit and inverter circuit are three-phase, and rectification circuit is every to be in series by an even number n diode, are divided into two groups up and down, and every group power cell number is n/2, and the input of the every phase of rectification circuit is the midpoint of two groups of unit; Inverter circuit is every to be formed by an even number n power unit cascade, is divided into two groups up and down, and every group power cell number is n/2, and the output of every phase is the midpoint of two groups of unit, and between output and the every group of unit to be coupled or non-coupling inductance is connected.
Compared with prior art, novelty of the present invention and creativeness are embodied in:
1) high voltage converter does not have transformer, has saved transformer case, and the cost of high voltage converter reduces half at least;
2) high voltage converter does not have transformer, has saved transformer case, and the volume of high voltage converter reduces half at least, and floor space at the scene also so at least reduces half;
3) high voltage converter does not have transformer, has saved transformer case, and the weight of high voltage converter reduces half at least, and cost of transportation is also corresponding to be reduced;
4) high voltage converter does not have transformer, has saved transformer case, and the structure of high voltage converter is compared simple a lot, and the production cycle reduces half at least, also helps on-the-spot installation, debugging and maintenance;
5) high voltage converter does not have transformer, has saved transformer case, has saved the energy consumption at transformer, need not to consider the temperature-rise effect of high voltage converter on transformer yet;
6) high voltage converter does not have transformer, has saved transformer case, and high voltage converter has absolute market competitiveness advantage.
Description of drawings
Fig. 1 is transformerless single quadrant high voltage converter topology diagram that half-bridge power unit is formed;
Fig. 2 is transformerless single quadrant high voltage converter topology diagram that the H bridge power unit is formed;
Fig. 3 is current direction figure in the half-bridge power unit;
Fig. 4 is current direction figure in the H bridge power unit.
Embodiment
See Fig. 1, Fig. 2, a kind of transformerless single quadrant high voltage converter topological structure, comprise LC filter circuit, high-voltage charging loop, rectification circuit, inverter circuit, after the high-voltage fence signal carries out filtering through the LC filter circuit, enter rectification circuit through the high-voltage charging loop, rectification circuit is formed the uncontrollable commutation system of three-phase, the capacitance voltage of constant each power cell by a plurality of diodes; Direct voltage after rectification is as the DC power supply of inverter circuit, and inverter circuit is made up of a plurality of power cells, and power cell can be half-bridge (Fig. 1) or H bridge (Fig. 2) structure, all can satisfy the demand that the PWM waveform generates.The high-voltage charging circuit is composed in parallel by charging resistor R and K switch M, and its input links to each other with the inductance L in LC loop, and its output links to each other with rectification circuit.
Rectification circuit and inverter circuit are three-phase, and rectification circuit is every to be in series by an even number n diode, are divided into two groups up and down, and every group power cell number is n/2, and the input of the every phase of rectification circuit is the midpoint of two groups of unit; Inverter circuit is every to be formed by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, and the output of every phase is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance between output and the every group of unit, makes output waveform smoothly stable more.
See Fig. 3-1, electric current flows to B through IGBT2 from A, adopts the power cell output level " 0 " of half bridge inverter circuit.
See Fig. 3-2, electric current flows to A through sustained diode 2 from B, adopts the power cell output level " 0 " of half bridge inverter circuit.
See Fig. 3-3, electric current by dc bus capacitor C, flows to B from A again through sustained diode 1, adopts the power cell output level " 1 " of half bridge inverter circuit.
See Fig. 3-4, electric current by dc bus capacitor C, flows to A from B again through IGBT1, adopts the power cell output level " 1 " of half bridge inverter circuit.
See Fig. 4-1, electric current flows to A through IGBT2, dc bus capacitor C, IGBT3 from B, or electric current flows to B through sustained diode 3, dc bus capacitor C, sustained diode 2 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
See Fig. 4-2, electric current flows to A through sustained diode 1, IGBT3 from B, or electric current flows to B through sustained diode 3, IGBT1 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 4-3, electric current flows to A through IGBT2, sustained diode 4 from B, or electric current flows to B through IGBT4, sustained diode 2 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 4-4, electric current flows to A through sustained diode 1, dc bus capacitor C, sustained diode 4 from B, or electric current flows to B through IGBT4, dc bus capacitor C, IGBT1 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
This topological high-voltage fence directly enters the high voltage converter rectification circuit through LC filter circuit and high-voltage charging circuit, forms a uncontrollable commutation system of three-phase, the capacitance voltage of constant each power cell by a plurality of diodes; The high voltage converter output inserts coupling inductance or non-coupling inductance, makes output waveform stable more level and smooth; Each power cell inverter circuit adopts semibridge system or H bridge-type all can satisfy the demand that the PWM waveform generates.

Claims (4)

1. transformerless single quadrant high voltage converter topological structure, it is characterized in that, comprise LC filter circuit, high-voltage charging loop, rectification circuit, inverter circuit, after the high-voltage fence signal carries out filtering by the LC filter circuit, enter rectification circuit through the high-voltage charging loop, rectification circuit is composed in series the uncontrollable commutation system of three-phase by a plurality of diodes; Direct voltage after rectification is as the DC power supply of inverter circuit, and inverter circuit is made up of a plurality of power unit cascades, and the inverter circuit output is connected to inductance.
2. a kind of transformerless single quadrant high voltage converter topological structure according to claim 1 is characterized in that, the power cell of described inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
3. a kind of transformerless single quadrant high voltage converter topological structure according to claim 1 is characterized in that, the power cell of described inverter circuit is the H bridge construction that four IGBT switching devices are formed.
4. according to each described a kind of transformerless four-quadrant high voltage converter topological structure in the claim 1 to 3, it is characterized in that, rectification circuit and inverter circuit are three-phase, rectification circuit is every to be in series by an even number n diode, be divided into two groups up and down, every group power cell number is n/2, and the input of the every phase of rectification circuit is the midpoint of two groups of unit; Inverter circuit is every to be formed by an even number n power unit cascade, is divided into two groups up and down, and every group power cell number is n/2, and the output of every phase is the midpoint of two groups of unit, and between output and the every group of unit to be coupled or non-coupling inductance is connected.
CN2010102336930A 2010-07-22 2010-07-22 Single quadrant high-pressure frequency converter topology structure without transformer Pending CN102013814A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2010102336930A CN102013814A (en) 2010-07-22 2010-07-22 Single quadrant high-pressure frequency converter topology structure without transformer
PCT/CN2011/077136 WO2012010065A1 (en) 2010-07-22 2011-07-14 Topology for single-quadrant transformerless high-voltage frequency converter

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Application Number Priority Date Filing Date Title
CN2010102336930A CN102013814A (en) 2010-07-22 2010-07-22 Single quadrant high-pressure frequency converter topology structure without transformer

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010065A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 Topology for single-quadrant transformerless high-voltage frequency converter
CN108551267A (en) * 2018-06-25 2018-09-18 中国大唐集团科学技术研究院有限公司华中分公司 The high voltage frequency converter of power cell composition
CN111464109A (en) * 2020-03-26 2020-07-28 新风光电子科技股份有限公司 Electrical topological structure of 10kV high-voltage variable frequency motor integrated machine

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DE102012204046B3 (en) * 2012-03-15 2013-08-14 Siemens Aktiengesellschaft Multicell converter
WO2019056072A1 (en) 2017-09-22 2019-03-28 Janislav Sega System and method for controlling a motor
CN108880278A (en) * 2018-08-01 2018-11-23 山东欧瑞安电气有限公司 A kind of 1140V permanent magnet direct-driven variable-frequency motor all-in-one machine major loop structure
CN109283418A (en) * 2018-11-28 2019-01-29 天津农学院 A kind of factory power test test method of universal frequency converter

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CN201774459U (en) * 2010-07-22 2011-03-23 荣信电力电子股份有限公司 Topological structure of transformerless single-quadrant high voltage frequency converter

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WO2010040388A1 (en) * 2008-10-07 2010-04-15 Abb Technology Ag Multilevel converter and method for compensating active and reactive power in a high voltage network
CN201774459U (en) * 2010-07-22 2011-03-23 荣信电力电子股份有限公司 Topological structure of transformerless single-quadrant high voltage frequency converter

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010065A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 Topology for single-quadrant transformerless high-voltage frequency converter
CN108551267A (en) * 2018-06-25 2018-09-18 中国大唐集团科学技术研究院有限公司华中分公司 The high voltage frequency converter of power cell composition
CN108551267B (en) * 2018-06-25 2024-03-08 中国大唐集团科学技术研究院有限公司华中分公司 High-voltage frequency conversion device composed of power units
CN111464109A (en) * 2020-03-26 2020-07-28 新风光电子科技股份有限公司 Electrical topological structure of 10kV high-voltage variable frequency motor integrated machine

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Application publication date: 20110413