CN201523337U - High-voltage high-power frequency converter by using low-voltage power to pre-charge - Google Patents
High-voltage high-power frequency converter by using low-voltage power to pre-charge Download PDFInfo
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- CN201523337U CN201523337U CN2009203137956U CN200920313795U CN201523337U CN 201523337 U CN201523337 U CN 201523337U CN 2009203137956 U CN2009203137956 U CN 2009203137956U CN 200920313795 U CN200920313795 U CN 200920313795U CN 201523337 U CN201523337 U CN 201523337U
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Abstract
The utility model relates to a high-power frequency converter, in particular to a high-voltage high-power frequency converter by using low-voltage power to pre-charge, which comprises a rectification phase-shifting transformer, a high-tension winding and a high-voltage contactor, wherein the rectification phase-shifting transformer is additionally provided with a set of low-voltage coils, a pre-charging circuit comprises the low-voltage coils, a series connection current-limiting element and a low-voltage contactor. The low-voltage contactor is connected to pre-charge each power unit when the high-power frequency converter is electrified on a frequency converter system every time, a filter capacitor of the power unit completes charging process, the low-voltage contactor is switched off to cut off a pre-charging loop, a high-voltage switch is switched off, and the system enters normal working states. The pre-charging circuit can effectively reduce electrifying impact of power grids and frequency converters. As the pre-charging circuit works in the low-voltage loop without needing the high-voltage switch, a power loop is simplified, the commissioning can be carried out when low tension is provided, and the high-voltage high-power frequency converter brings extreme convenience for commissioning. The converter simplifies running procedures and provides good operability and economical efficiency.
Description
Technical field
The utility model relates to big-power transducer, refers in particular to a kind of with the precharge high-voltage high-power frequency transformator of low-tension supply.
Background technology
The controlling schemes that powers on of present high voltage converter, generally do not establish the low pressure pre-charge circuit, therefore the high-tension circuit part must be provided with current limiting element and switching device, make the power up complexity, and the impulse current that is frequently powered on, make high voltage converter be very easy to produce fault, greatly reduce the reliability of system.
Summary of the invention
The purpose of this utility model is improved, is innovated at shortcoming that exists in the background technology and problem, and a kind of simple, safe, cheap precharge high-voltage high-power frequency transformator of usefulness low-tension supply is provided.
The technical solution of the utility model is a kind of frequency converter that comprises following structure of structure:
Be made up of rectification phase shifting transformer and high pressure winding and high voltage connector, be characterized in: the rectification phase shifting transformer is set up one group of low-voltage coil, and low-voltage coil and connect current limiting element and lv contactor are formed pre-charge circuit.
The utility model is connected lv contactor at every turn earlier and is carried out precharge for each power cell when frequency convertor system powers on, after finishing, the filter capacitor charging process of constant power unit disconnects lv contactor excision precharge loop, the closed high switch, system enters normal operating conditions.This pre-charge circuit can effectively reduce the last surge of electrical network and frequency converter.Because the pre-charge circuit that uses is operated in low tension loop, does not need high-voltage switch gear, has simplified electric power loop, has low tension just can carry out during debugging, brings great convenience to debugging.Also simplify working procedure, made it have good operability and economy.
Description of drawings
Accompanying drawing is the utility model schematic diagram
Embodiment
By accompanying drawing as can be known, the utility model is made up of rectification phase shifting transformer 1 and high pressure winding 2 and high voltage connector 3, be characterized in: rectification phase shifting transformer 1 is set up one group of low-voltage coil 4, and low-voltage coil 4 is formed pre-charge circuit with connect current limiting element 5 and lv contactor 6.
Current limiting element 5 described in the utility model comprises resistance or inductance, or the combination of resistance and inductance.Described lv contactor comprises solenoid, and the solenoid of lv contactor is connected with the controller of high voltage converter.
The utility model comprises a lv contactor and resistance and/or inductance or their combining form, because first precharge, disconnect behind the lv contactor excision precharge loop closed high switch again, promptly two power supplys are not simultaneously to inverter supply, so do not need the phase sequence between corresponding two power supplys, but when in this loop the load of requirement phase place being arranged, (as ventilation blower etc.) then will be proofreaded three-phase phase-sequence and make its phase sequence direction identical.Lv contactor is useful on the control interface that is connected with the controller of frequency converter.
The utility model by the rectifier transformer of high voltage converter many around one group of low-voltage coil by the low-voltage AC of lv contactor input through resistance and/or inductance or their combining form, the solenoid of lv contactor is connected with the controller of high voltage converter, compare with other the controlling schemes that powers on, save the current limiting element and the switching device of high-pressure section, can effectively reduce the power-on impact current of electrical network and frequency converter.The employed component number of the utility model is few, and cost is low, makes power up simple, has reduced the failure rate of high voltage converter, has improved the reliability of system.
Embodiment described in the utility model only is the description that preferred implementation of the present utility model is carried out; be not that the utility model design and scope are limited; under the prerequisite that does not break away from the utility model design philosophy; engineers and technicians make the technical solution of the utility model in this area various modification and improvement; all should fall into protection range of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.
Claims (3)
1. one kind with the precharge high-voltage high-power frequency transformator of low-tension supply, it is characterized in that forming by rectification phase shifting transformer (1) and high pressure winding (2) and high voltage connector (3), it is characterized in that: rectification phase shifting transformer (1) is set up one group of low-voltage coil (4), and low-voltage coil (4) is formed pre-charge circuit with current limiting element of connecting (5) and lv contactor (6).
2. the precharge high-voltage high-power frequency transformator of low-tension supply of using according to claim 1 is characterized in that described current limiting element (5) comprises resistance or inductance, or the combination of resistance and inductance.
3. according to claim 1 with the precharge high-voltage high-power frequency transformator of low-tension supply, it is characterized in that described lv contactor comprises solenoid, and the solenoid of lv contactor is connected with the controller of high voltage converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203137956U CN201523337U (en) | 2009-10-30 | 2009-10-30 | High-voltage high-power frequency converter by using low-voltage power to pre-charge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203137956U CN201523337U (en) | 2009-10-30 | 2009-10-30 | High-voltage high-power frequency converter by using low-voltage power to pre-charge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201523337U true CN201523337U (en) | 2010-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203137956U Expired - Fee Related CN201523337U (en) | 2009-10-30 | 2009-10-30 | High-voltage high-power frequency converter by using low-voltage power to pre-charge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201523337U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895205A (en) * | 2010-07-27 | 2010-11-24 | 株洲南车时代电气股份有限公司 | Transducer |
| CN102594159A (en) * | 2012-02-16 | 2012-07-18 | 华为技术有限公司 | Intermediate-voltage concatenated frequency converter, pre-charging method and system |
| CN103078474A (en) * | 2012-12-31 | 2013-05-01 | 国家电网公司 | Soft charging device for high-voltage frequency converter and control method thereof |
| CN103647458A (en) * | 2013-12-24 | 2014-03-19 | 苏州汇川技术有限公司 | Frequency conversion system and method and device for precharging high-voltage frequency converter in frequency conversion system |
| CN104038032A (en) * | 2014-05-26 | 2014-09-10 | 株洲变流技术国家工程研究中心有限公司 | Low-voltage precharging system for high-voltage variable frequency system, and control method of low-voltage precharging system |
| US9153956B2 (en) | 2012-05-15 | 2015-10-06 | Omicron Electronics Gmbh | Test device for power engineering equipment and method for manufacturing a test device for power engineering equipment |
| CN105322808A (en) * | 2014-06-08 | 2016-02-10 | 株式会社安川电机 | Inverter system, inverter apparatus, and method of controlling inverter system |
| CN105393446A (en) * | 2013-05-20 | 2016-03-09 | 通用电气能源能量变换技术有限公司 | Input filter pre-charge fed by a medium-voltage grid supply |
| CN104242625B (en) * | 2014-09-26 | 2019-01-04 | 徐州中矿大传动与自动化有限公司 | A kind of five-level converter pre-charging device and control device and control method |
-
2009
- 2009-10-30 CN CN2009203137956U patent/CN201523337U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895205B (en) * | 2010-07-27 | 2012-10-24 | 株洲南车时代电气股份有限公司 | Transducer |
| CN101895205A (en) * | 2010-07-27 | 2010-11-24 | 株洲南车时代电气股份有限公司 | Transducer |
| CN102594159A (en) * | 2012-02-16 | 2012-07-18 | 华为技术有限公司 | Intermediate-voltage concatenated frequency converter, pre-charging method and system |
| CN102594159B (en) * | 2012-02-16 | 2014-06-04 | 华为技术有限公司 | Intermediate-voltage concatenated frequency converter, pre-charging method and system |
| US9153956B2 (en) | 2012-05-15 | 2015-10-06 | Omicron Electronics Gmbh | Test device for power engineering equipment and method for manufacturing a test device for power engineering equipment |
| CN103078474A (en) * | 2012-12-31 | 2013-05-01 | 国家电网公司 | Soft charging device for high-voltage frequency converter and control method thereof |
| US9748860B2 (en) | 2013-05-20 | 2017-08-29 | Ge Energy Power Conversion Technology Ltd | Input filter pre-charge fed by a medium-voltage grid supply |
| CN105393446B (en) * | 2013-05-20 | 2018-01-12 | 通用电气能源能量变换技术有限公司 | The input filter precharge of medium voltage network power feed |
| CN105393446A (en) * | 2013-05-20 | 2016-03-09 | 通用电气能源能量变换技术有限公司 | Input filter pre-charge fed by a medium-voltage grid supply |
| CN103647458A (en) * | 2013-12-24 | 2014-03-19 | 苏州汇川技术有限公司 | Frequency conversion system and method and device for precharging high-voltage frequency converter in frequency conversion system |
| CN103647458B (en) * | 2013-12-24 | 2016-03-23 | 苏州汇川技术有限公司 | Frequency conversion system and carry out the method and apparatus of precharge to the high voltage converter in it |
| CN104038032B (en) * | 2014-05-26 | 2018-01-05 | 株洲变流技术国家工程研究中心有限公司 | Low pressure pre-charge system and its control method for high voltage frequency conversion system |
| CN104038032A (en) * | 2014-05-26 | 2014-09-10 | 株洲变流技术国家工程研究中心有限公司 | Low-voltage precharging system for high-voltage variable frequency system, and control method of low-voltage precharging system |
| CN105322808A (en) * | 2014-06-08 | 2016-02-10 | 株式会社安川电机 | Inverter system, inverter apparatus, and method of controlling inverter system |
| CN105322808B (en) * | 2014-06-08 | 2018-03-02 | 株式会社安川电机 | Inverter system, inverter apparatus and the method for controlling inverter system |
| CN104242625B (en) * | 2014-09-26 | 2019-01-04 | 徐州中矿大传动与自动化有限公司 | A kind of five-level converter pre-charging device and control device and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20161030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |