CN203071823U - A cascaded high-voltage frequency converter formed by power units connected in parallel - Google Patents
A cascaded high-voltage frequency converter formed by power units connected in parallel Download PDFInfo
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- CN203071823U CN203071823U CN 201320003179 CN201320003179U CN203071823U CN 203071823 U CN203071823 U CN 203071823U CN 201320003179 CN201320003179 CN 201320003179 CN 201320003179 U CN201320003179 U CN 201320003179U CN 203071823 U CN203071823 U CN 203071823U
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Abstract
The utility model relates to a cascaded high-voltage frequency converter formed by power units connected in parallel. The cascaded high-voltage frequency converter comprises a phase-shifting isolation transformer, a system master controller, and power units and is characterized in that a power unit in parallel connection is formed by two adjacent power units, that the positive DC buses of the two power units included by each power unit in parallel connection are connected while the negative DC buses of the two power units included by each power unit in parallel connection are connected, that the two output ends of each power unit included by the power unit in parallel connection are short-circuited to be used as an output end, and that the two short-circuited output ends of the power units are used as the output ends of the power unit in parallel connection. By using a unit structure formed by the two power units connected in parallel, the capacity of the frequency converter is effectively increased and the application demands of some large-power frequency converters are satisfied.
Description
Technical field
The utility model relates to tandem type high voltage converter field, relates in particular to the tandem type high voltage converter of power cell parallel connection.
Background technology
Frequency converter has power factor height, efficient height, speed-regulating range width and precision advantages of higher, to improve technology, improve the quality of products beneficial, again can be energy-conservation and be beneficial to the equipment economical operation, so in industry extensive uses such as metallurgy, chemical industry, electric power, municipal water supply and mining, and more and more important effect of performance.
In order to be suitable for energy-conservation, the speed governing requirement of more extensive motor, following high voltage converter market will be to high-power, high extreme direction development.To high-power high voltage frequency converter development, technical threshold is higher on the one hand, designs on the other hand, produces, the difficulty of aspect such as manufacturing is also more, causes the cycle also longer.
Summary of the invention
The purpose of this utility model provides a kind of tandem type high voltage converter based on the power cell parallel connection, adopts the mode of two power cell parallel connections to form a cellular construction, can effectively improve frequency inverter capacity, satisfies the application demand of some big-power transducers.
For achieving the above object, the utility model is realized by the following technical solutions:
Tandem type high voltage converter based on the power cell parallel connection, comprise phase shift isolating transformer, system master device processed and power cell, it is characterized in that, described power cell electric current and voltage grade is identical, adjacent two power cells are formed a power cell in parallel, and per 6 power cells in parallel are formed a phase, altogether three-phase, 18 power cells in parallel are connected with phase shift isolating transformer secondary winding, and 18 power cells in parallel also are connected by optical fiber with system master device processed.
The positive direct-current bus of two power cells that described each power cell in parallel comprises is connected, and negative dc bus is connected; Two power cells that described each power cell in parallel comprises, two output short circuits of each power cell are as an output, two outputs that output is each power cell in parallel behind two power cell short circuits.
Described power cell in parallel connects secondary winding of phase shift isolating transformer after two power cell inputs that comprise are connected in parallel.
Compared with prior art, the utility model has the advantages that:
Realize the parallel connection of tandem type transducer power unit, solve unit output in parallel and cause very big uneven flow problem.This power cell parallel way is simple in structure, economical quick, keeps the reliability and stability of frequency converter, improves the tandem type frequency inverter capacity.
Description of drawings
The major loop topology diagram of the tandem type high voltage converter of Fig. 1 power cell parallel connection.
Fig. 2-1 is a power cell circuit diagram.
Fig. 2-2 is power cell circuit diagrams in parallel.
Fig. 3-1, Fig. 3-2, Fig. 3-3, Fig. 3-4, Fig. 3-5, Fig. 3 the-the 6th, power cell current direction figure in parallel.
Embodiment
Below in conjunction with description of drawings concrete technology contents of the present utility model is described in further detail.
See Fig. 1, a kind of major loop topology diagram of the high voltage converter based on the power cell parallel connection, described high voltage converter comprises phase shift isolating transformer, system master device processed and power cell, described power cell electric current and voltage grade is identical, adjacent two power cells are formed a power cell in parallel, per 6 power cells in parallel are formed a phase, be total to three-phase, 18 power cells in parallel are connected with phase shift isolating transformer secondary winding, and 18 power cells in parallel also are connected by optical fiber with system master device processed.
The positive direct-current bus of two power cells that each power cell in parallel comprises is connected, and negative dc bus is connected; Two power cells that described each power cell in parallel comprises, two output short circuits of each power cell are as an output, two outputs that output is each power cell in parallel behind two power cell short circuits; Power cell in parallel connects secondary winding of phase shift isolating transformer after two power cell inputs that comprise are connected in parallel.
The course of work of described frequency converter is: High Level AC Voltage is after the step-down of phase shift isolating transformer, phase shift, give each power cell A1～A6 in parallel, B1～B6, C1～C6 one supplying power for input end respectively, the power supply that is connected in parallel of two inputs of each power cell in parallel is as the unit main circuit power.The output voltage of each power cell A1～A6 in parallel, B1～B6, C1～C6 forms the three phase sine waveform after overlapped in series then, the power supply of phase motor.
Fig. 2-1 is common power cell major loop figure.It comprises rectification circuit, intermediate DC circuit, inverter circuit and cell controller.Described rectification circuit can be the uncontrollable rectification circuit of three-phase that adopts six diodes to constitute, and also can be to adopt six IGBT to constitute the Three-Phase PWM Rectifier part; Described inverter circuit constitutes single-phase H type bridge circuit for adopting IGBT; The order of described power cell controller responding system master controller, the driving of control power cell power device IGBT.
Fig. 2-2 is the major loop figure of power cell in parallel.It is made up of two power cells shown in Fig. 2-1, the positive direct-current bus of power cell U1# is connected with the positive direct-current bus of power cell U2#, namely be connected in the positive direct-current bus jointly, the negative dc bus of power cell U1# is connected with the negative dc bus of power cell U2#, namely be connected in negative dc bus jointly, with reference to figure 2-1, Fig. 2-2, the former output U of power cell U1# becomes O1 with the V short circuit, the former output U of power cell U2# becomes O2 with the V short circuit, and O1 and O2 are as two outputs of power cell in parallel.The driving of each power device IGBT of power cell in parallel is controlled in the order of responding system master controller respectively of two controllers of power cell in parallel.Power cell in parallel has two three-phase input ends, the secondary winding of the phase shift isolating transformer that is connected in parallel.
Fig. 3-1 is the main circuit current flow graph of power cell in parallel.Electric current is through IGBT2 and the IGBT4 of unit U2#, be divided into two-way to U2# unit negative busbar, one the tunnel is total to the C of negative busbar and U1# unit, the C of U2# unit, another road and common positive straight edge line, merge to U1# unit positive bus-bar two-way, IGBT1 and IGBT3 through U1# flow to O1 from O2, at this moment power cell output level in parallel " 1 ".
Fig. 3-2 is the main circuit current flow graph of power cell in parallel.Electric current is through IGBT2 and the IGBT4 of unit U1#, be divided into two-way to U2# unit negative busbar, the C of one road U1# unit and common positive bus-bar, another road is total to the C of negative busbar and U2# unit, merge to U1# unit positive bus-bar two-way, IGBT1 and IGBT3 through U2# flow to O2 from O1, at this moment power cell output level in parallel " 1 ".
Fig. 3-3 is the main circuit current flow graph of power cell in parallel.Electric current is total to negative busbar through IGBT2 and the IGBT4 of unit U2#, and the D2 of U1# and D4 flow to O1 from O2, at this moment power cell output level in parallel " 0 ".
Fig. 3-4 is the main circuit current flow graph of power cell in parallel.Electric current is total to negative busbar through IGBT2 and the IGBT4 of unit U1#, and the D2 of U2# and D4 flow to O1 from O2, at this moment power cell output level in parallel " 0 ".
Fig. 3-5 is the main circuit current flow graph of power cell in parallel.Electric current is total to positive bus-bar through D1 and the D3 of unit U2#, and the IGBT1 of U1# and IGBT3 flow to O1 from O2, at this moment power cell output level in parallel " 0 ".
Fig. 3-6 is the main circuit current flow graph of power cell in parallel.Electric current is total to positive bus-bar through D1 and the D3 of unit U1#, and the IGBT1 of U2# and IGBT3 flow to O2 from O1, at this moment power cell output level in parallel " 0 ".
Claims (3)
1. based on the tandem type high voltage converter of power cell parallel connection, comprise phase shift isolating transformer, system master device processed and power cell, it is characterized in that, described power cell electric current and voltage grade is identical, adjacent two power cells are formed a power cell in parallel, and per 6 power cells in parallel are formed a phase, altogether three-phase, 18 power cells in parallel are connected with phase shift isolating transformer secondary winding, and 18 power cells in parallel also are connected by optical fiber with system master device processed.
2. the tandem type high voltage converter based on the power cell parallel connection according to claim 1 is characterized in that, the positive direct-current bus of two power cells that described each power cell in parallel comprises is connected, and negative dc bus is connected; Two power cells that described each power cell in parallel comprises, two output short circuits of each power cell are as an output, two outputs that output is each power cell in parallel behind two power cell short circuits.
3. the tandem type high voltage converter based on the power cell parallel connection according to claim 1 is characterized in that, described power cell in parallel connects secondary winding of phase shift isolating transformer after two power cell inputs that comprise are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320003179 CN203071823U (en) | 2013-01-05 | 2013-01-05 | A cascaded high-voltage frequency converter formed by power units connected in parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320003179 CN203071823U (en) | 2013-01-05 | 2013-01-05 | A cascaded high-voltage frequency converter formed by power units connected in parallel |
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| CN203071823U true CN203071823U (en) | 2013-07-17 |
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| CN 201320003179 Expired - Lifetime CN203071823U (en) | 2013-01-05 | 2013-01-05 | A cascaded high-voltage frequency converter formed by power units connected in parallel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633854A (en) * | 2013-12-15 | 2014-03-12 | 贵阳航空电机有限公司 | Transducer |
| CN106059260A (en) * | 2016-05-26 | 2016-10-26 | 苏州英威腾电力电子有限公司 | Super-power high-voltage frequency converter |
| CN106130323B (en) * | 2016-06-29 | 2018-12-07 | 苏州英威腾电力电子有限公司 | A kind of control method of power supply, apparatus and system |
-
2013
- 2013-01-05 CN CN 201320003179 patent/CN203071823U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633854A (en) * | 2013-12-15 | 2014-03-12 | 贵阳航空电机有限公司 | Transducer |
| CN106059260A (en) * | 2016-05-26 | 2016-10-26 | 苏州英威腾电力电子有限公司 | Super-power high-voltage frequency converter |
| CN106130323B (en) * | 2016-06-29 | 2018-12-07 | 苏州英威腾电力电子有限公司 | A kind of control method of power supply, apparatus and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160902 Address after: 114051, Liaoning, Anshan MTR Eastern Science and technology road, No. 108 Patentee after: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Address before: 114051 Liaoning city of Anshan province high tech Zone Anqian Road No. 261 Patentee before: LIAONING RONGXIN ZHONGTENG TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180929 Address after: 114051 Anshan City, Liaoning, the East District of science and Technology Road No. 108 Patentee after: LIAONING RONGXIN INDUSTRIAL ELECTRIC POWER TECHNOLOGY CO.,LTD. Address before: 114051 Anshan City, Liaoning, the East District of science and Technology Road No. 108 Patentee before: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |
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| CX01 | Expiry of patent term |