CN201774460U - Transformerless four-quadrant high-voltage frequency converter topological structure - Google Patents
Transformerless four-quadrant high-voltage frequency converter topological structure Download PDFInfo
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- CN201774460U CN201774460U CN2010202680280U CN201020268028U CN201774460U CN 201774460 U CN201774460 U CN 201774460U CN 2010202680280 U CN2010202680280 U CN 2010202680280U CN 201020268028 U CN201020268028 U CN 201020268028U CN 201774460 U CN201774460 U CN 201774460U
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Abstract
The utility model relates to a transformerless four-quadrant high-voltage frequency converter topological structure comprising a high-voltage charging circuit, an inductor, a rectifying circuit and an inverse circuit, wherein a high-voltage power grid enters the rectifying circuit of a high-voltage frequency converter directly through the high-voltage charging circuit and the coupled or uncoupled inductor; the rectifying circuit is a controlled rectifying system comprising a plurality of rectifying units, direct-current voltage supplies power to the inverse circuit after being rectified, and the inverse output end is accessed with the coupled or uncoupled inductor; and the rectifying circuit and the inverse circuit consist of power units which are connected in series. The transformerless four-quadrant high-voltage frequency converter topological structure leads a four-quadrant high-voltage frequency converter to be capable of realizing the purpose of frequency-conversion, speed-regulating and four-quadrant running motor without a transformer, thus greatly reducing the volume of the high-voltage frequency converter and reducing the cost.
Description
Technical field
The utility model relates to a kind of four-quadrant high voltage converter topological structure, particularly a kind of transformerless four-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.
The utility model content
The purpose of this utility model provides a kind of transformerless four-quadrant high voltage converter topological structure, this topological structure makes the four-quadrant high voltage converter need not the purpose that transformer can be realized frequency control and four quadrant running motor, significantly reduce the volume of high voltage converter, reduced cost.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of transformerless four-quadrant high voltage converter topological structure, comprise high-voltage charging circuit, inductance, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit after high-voltage charging circuit, coupling or the non-coupling inductance, the controlled rectification system that rectification circuit is made up of a plurality of rectification units, direct voltage after rectification is the inverter circuit power supply, and inverting output terminal inserts coupling or non-coupling inductance; Described rectification circuit and inverter circuit are made up of power unit cascade.
The power cell of described rectification circuit, inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
The power cell of described rectification circuit, inverter circuit is the H bridge construction that four IGBT switching devices are formed.
Described rectification circuit is identical with the power cell structure that inverter circuit adopts, but the phase trans-substitution.
Rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, the input of the every phase of rectification circuit is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance between input and the every group of unit; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance between output and the every group of unit.
Compared with prior art, novelty of the present utility model 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.
A kind of transformerless four-quadrant high voltage converter topology that the utility model is related makes the four-quadrant high voltage converter need not transformer and can realize high-voltage frequency conversion and speed-adjusting and energy is fed back to electrical network, reaches the purpose of four quadrant running motor.Use the four-quadrant 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.
Description of drawings
Fig. 1 is the transformerless four-quadrant high voltage converter topology diagram that the semibridge system power cell is formed;
Fig. 2 is the transformerless four-quadrant high voltage converter topology diagram that H bridge-type power cell is formed;
Fig. 3 is current direction figure in the semibridge system power cell;
Fig. 4 is current direction figure in the H bridge-type power cell.
Embodiment
See Fig. 1, Fig. 2, a kind of transformerless four-quadrant high voltage converter topological structure, comprise high-voltage charging circuit, inductance L, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit behind high-voltage charging circuit, coupling or the non-coupling inductance L1, the controlled rectification system that rectification circuit is made up of a plurality of rectification units, direct voltage after rectification is the inverter circuit power supply, and inverting output terminal inserts coupling or non-coupling inductance L2; Described rectification circuit and inverter circuit are made up of power unit cascade, and the high-voltage charging circuit is composed in parallel by charging resistor R and K switch M.
Rectification circuit is identical with the power cell that inverter circuit adopts, but the phase trans-substitution; Described power cell is half-bridge or H bridge controlled architecture.The power cell of Fig. 1 is a half-bridge structure, and the power cell of Fig. 2 is the H bridge construction.
Rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, the input of the every phase of rectification circuit is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance L1 between input and the every group of unit; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance L2 between output and the every group of unit.
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.
High-voltage fence directly passes through high-voltage charging circuit and coupling or non-coupling inductance and enters the high voltage converter rectification circuit; Form a three-phase controlled rectification system, the capacitance voltage of constant each power cell by a plurality of power cells; 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; The power cell structure that rectification circuit and inverter circuit adopted is in full accord, can call mutually.
Claims (5)
1. transformerless four-quadrant high voltage converter topological structure, it is characterized in that, comprise high-voltage charging circuit, inductance, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit after high-voltage charging circuit, coupling or the non-coupling inductance, the controlled rectification system that rectification circuit is made up of a plurality of rectification units, direct voltage after rectification is the inverter circuit power supply, and inverting output terminal inserts coupling or non-coupling inductance; Described rectification circuit and inverter circuit are made up of power unit cascade.
2. a kind of transformerless four-quadrant high voltage converter topological structure according to claim 1 is characterized in that, the power cell of described rectification circuit, inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
3. a kind of transformerless four-quadrant high voltage converter topological structure according to claim 1 is characterized in that, the power cell of described rectification circuit, inverter circuit is the H bridge construction that four IGBT switching devices are formed.
4. according to claim 2 or 3 described a kind of transformerless four-quadrant high voltage converter topological structures, it is characterized in that described rectification circuit is identical with the power cell structure that inverter circuit adopts, but the phase trans-substitution.
5. according to claim 2 or 3 described a kind of transformerless four-quadrant high voltage converter topological structures, it is characterized in that, rectification circuit and inverter circuit are three-phase, whenever, form 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 input of the every phase of rectification circuit is the midpoint of two groups of unit, and between input and the every group of unit to be coupled or non-coupling inductance is connected; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance between output and the every group of unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202680280U CN201774460U (en) | 2010-07-22 | 2010-07-22 | Transformerless four-quadrant high-voltage frequency converter topological structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202680280U CN201774460U (en) | 2010-07-22 | 2010-07-22 | Transformerless four-quadrant high-voltage frequency converter topological structure |
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| Publication Number | Publication Date |
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| CN201774460U true CN201774460U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202680280U Expired - Fee Related CN201774460U (en) | 2010-07-22 | 2010-07-22 | Transformerless four-quadrant high-voltage frequency converter topological structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013813A (en) * | 2010-07-22 | 2011-04-13 | 荣信电力电子股份有限公司 | Four-quadrant high pressure frequency converter topology structure without transformer |
| CN112838769A (en) * | 2021-03-08 | 2021-05-25 | 中国矿业大学(北京) | Transformer-isolation-free star-connection medium-high voltage variable frequency speed regulation system and control method |
-
2010
- 2010-07-22 CN CN2010202680280U patent/CN201774460U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013813A (en) * | 2010-07-22 | 2011-04-13 | 荣信电力电子股份有限公司 | Four-quadrant high pressure frequency converter topology structure without transformer |
| WO2012010067A1 (en) * | 2010-07-22 | 2012-01-26 | 荣信电力电子股份有限公司 | Topological structure for transformerless four-quadrant high voltage frequency converter |
| CN112838769A (en) * | 2021-03-08 | 2021-05-25 | 中国矿业大学(北京) | Transformer-isolation-free star-connection medium-high voltage variable frequency speed regulation system and control method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20130722 |