CN202872653U - Parallel type high-power combination frequency converter - Google Patents
Parallel type high-power combination frequency converter Download PDFInfo
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- CN202872653U CN202872653U CN 201220484875 CN201220484875U CN202872653U CN 202872653 U CN202872653 U CN 202872653U CN 201220484875 CN201220484875 CN 201220484875 CN 201220484875 U CN201220484875 U CN 201220484875U CN 202872653 U CN202872653 U CN 202872653U
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Abstract
The utility model discloses a parallel type high-power combination frequency converter. The parallel type high-power combination frequency converter comprises multiple transformers, multiple filter inductors and multiple frequency conversion units which are in the same quantity, wherein a first input end of each transformer is connected with a first end of an input power supply; a second input end of each transformer is connected with a second end of the input power supply; an output end of each transformer is connected in series with a corresponding filter inductor and then is connected with an input end of a corresponding frequency conversion unit; first output ends of the frequency conversion units are connected in parallel and then serve as a first end of an output power supply; and second output ends of the frequency conversion units are connected in parallel and then serve as a second end of the output power supply. The parallel type high-power combination frequency converter, through connecting output ends of the multiple independent frequency conversion units in series, has the advantages of high output voltage power, small harmonic wave, high operation efficiency, high equivalent switching frequency and small switching loss.
Description
Technical field
The utility model relates to a kind of frequency converter, relates in particular to a kind of high frequency, efficient parallel connection type high power combination frequency converter.
Background technology
Depth development along with modern industry, the application of high-power current converting device in national economy is more and more extensive, such as large-capacity transducer, high-power electric active filter, static passive compensation device, MW level wind-powered electricity generation unit with current transformer etc., and for the high-power converter occasion, often exist contradiction between the power handling capability of high-power switch device and the switching frequency, the larger switching frequency of power is lower usually.Because the restriction of switching frequency is difficult to use the performance that the PWM technology is improved the large capacity current transformer of tradition.Therefore, in the high-power converter occasion, people often wish that high-power, high voltage bearing power electronic equipment can be operated under the high as far as possible switching frequency, in order to improve the quality of output waveform.
Common inverter is also referred to as two level converters usually, this topological structure is fairly simple, high-power in order to obtain, the general switching device that relies on connects to bear high pressure, bearing large electric current, but because the discreteness of power device parameter, this will bring the series of problems such as quiet, dynamic voltage balancing and current-sharing with the switching device parallel connection, technical uncertain factor impact is very large, and reliability is not high; But because output only has two level, voltage fluctuation is large, produces larger harmonic wave.Therefore this structure applications scope is very limited.
Summary of the invention
The purpose of this utility model just is to provide in order to address the above problem a kind of high frequency, efficient parallel connection type high power combination frequency converter.
The utility model is achieved through the following technical solutions above-mentioned purpose:
Parallel connection type high power combination frequency converter described in the utility model comprises a plurality of transformers that quantity is identical, a plurality of filter inductances and a plurality of converter unit, the first input end of each described transformer all is connected with the first end of input power, the second input of each described transformer all is connected with the second end of input power, be connected with the input of corresponding described converter unit again after the output of each described transformer and the corresponding described filter inductance series connection, after being connected in parallel, the first output of each described converter unit is to be the second end of out-put supply after the first end of out-put supply, the second output of each described converter unit are connected in parallel.
As preferably, described transformer, described filter inductance and described converter unit are four.
Particularly, described converter unit comprises rectification circuit, flat wave circuit, control circuit and inverter circuit, described flat wave circuit is connected in series between described rectification circuit and the described inverter circuit, the voltage sample input of described control circuit is connected with the input of described inverter circuit, the current sample input of described control circuit is connected with the output of described inverter circuit, and the output of described control circuit is connected with the input of described inverter circuit.The structure of above-mentioned converter unit is the structure of traditional single inverter.
The beneficial effects of the utility model are:
The utility model is connected in parallel by the output with a plurality of independently converter units, has advantages of that output voltage power is large, harmonic wave is little, operational efficiency is high, equivalent switching frequency is high, switching loss is little.
Description of drawings
Fig. 1 is the electrical block diagram of parallel connection type high power combination frequency converter described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, parallel connection type high power combination frequency converter described in the utility model comprises four transformers, four filter inductances and four converter units, four transformers are respectively the first transformer T1, the second transformer T2, the 3rd transformer T3 and the 4th transformer T4, four filter inductances are respectively the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3 and the 4th filter inductance L4, four converter units are respectively the first converter unit BP1, the second converter unit BP2, the 3rd converter unit BP3 and the 4th converter unit BP4, the first input end of the first transformer T1, the first input end of the second transformer T2, the first input end of the first input end of the 3rd transformer T3 and the 4th transformer T4 all is connected with the first end of input power Vin, the second input of the first transformer T1, the second input of the second transformer T2, the second input of the second input of the 3rd transformer T3 and the 4th transformer T4 all is connected with the second end of input power Vin, be connected with the input of the first converter unit BP1 again after the output of the first transformer T1 and the first filter inductance L1 series connection, be connected with the input of the second converter unit BP2 again after the output of the second transformer T2 and the second filter inductance L2 series connection, is connected with the input of the 3rd converter unit BP3 again after the output of the 3rd transformer T3 and the 3rd filter inductance L3 series connection, the output of the 4th transformer T4 be connected with the input of the 4th converter unit BP4 again after the 4th filter inductance L4 connects; After being connected in parallel, the first output of the first output of the first output of the first output of the first converter unit BP1, the second converter unit BP2, the 3rd converter unit BP3 and the 4th converter unit BP4 is to be the second end of out-put supply Vout after the first end of out-put supply Vout, the second output of the second output of the second output of the first converter unit BP1, the second converter unit BP2, the second output of the 3rd converter unit BP3 and the 4th converter unit BP4 are connected in parallel.
The first converter unit BP1, the second converter unit BP2, the 3rd converter unit BP3 is identical with the structure of the 4th converter unit BP4, be the structure of traditional single inverter (owing to being existing structure, so do not illustrate in the drawings), specifically comprise rectification circuit, flat wave circuit, control circuit and inverter circuit, described flat wave circuit is connected in series between described rectification circuit and the described inverter circuit, the voltage sample input of described control circuit is connected with the input of described inverter circuit, the current sample input of described control circuit is connected with the output of described inverter circuit, and the output of described control circuit is connected with the input of described inverter circuit.
Claims (3)
1. parallel connection type high power combination frequency converter, it is characterized in that: comprise a plurality of transformers that quantity is identical, a plurality of filter inductances and a plurality of converter unit, the first input end of each described transformer all is connected with the first end of input power, the second input of each described transformer all is connected with the second end of input power, be connected with the input of corresponding described converter unit again after the output of each described transformer and the corresponding described filter inductance series connection, after being connected in parallel, the first output of each described converter unit is to be the second end of out-put supply after the first end of out-put supply, the second output of each described converter unit are connected in parallel.
2. parallel connection type high power combination frequency converter according to claim 1, it is characterized in that: described transformer, described filter inductance and described converter unit are four.
3. parallel connection type high power combination frequency converter according to claim 1, it is characterized in that: described converter unit comprises rectification circuit, flat wave circuit, control circuit and inverter circuit, described flat wave circuit is connected in series between described rectification circuit and the described inverter circuit, the voltage sample input of described control circuit is connected with the input of described inverter circuit, the current sample input of described control circuit is connected with the output of described inverter circuit, and the output of described control circuit is connected with the input of described inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220484875 CN202872653U (en) | 2012-09-21 | 2012-09-21 | Parallel type high-power combination frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220484875 CN202872653U (en) | 2012-09-21 | 2012-09-21 | Parallel type high-power combination frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872653U true CN202872653U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220484875 Expired - Fee Related CN202872653U (en) | 2012-09-21 | 2012-09-21 | Parallel type high-power combination frequency converter |
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| CN (1) | CN202872653U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683962A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Parallel connection type high-power combined frequency converter |
-
2012
- 2012-09-21 CN CN 201220484875 patent/CN202872653U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683962A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Parallel connection type high-power combined frequency converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130410 Termination date: 20130921 |