CN102684466A - Low-voltage ride-through bus voltage device of driver - Google Patents
Low-voltage ride-through bus voltage device of driver Download PDFInfo
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- CN102684466A CN102684466A CN2011103885395A CN201110388539A CN102684466A CN 102684466 A CN102684466 A CN 102684466A CN 2011103885395 A CN2011103885395 A CN 2011103885395A CN 201110388539 A CN201110388539 A CN 201110388539A CN 102684466 A CN102684466 A CN 102684466A
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- relay
- direct current
- voltage
- current reactor
- loop
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Abstract
The invention provides a low-voltage ride-through bus voltage device of a driver. The two ends of a pre-charging resistor (Rf) are connected with a first relay (K1) in parallel to form a pre-charging circuit. The two ends of a first direct-current electric reactor (L1) are connected with a second relay (K2) in parallel, and the two ends of a second direct-current electric reactor (L2) are connected with a third relay (K3) in parallel, so as to form a direct-current electric reactor circuit. The first relay (K1) is controlled by an independent control signal; and the second relay (K2) and the third relay (K3) are controlled by the same control signal. When the pre-charging circuit works, the second relay (K2) and the third relay (K3) are sucked to be subjected to short circuit; and when the first direct-current electric reactor (L1) and the second direct-current electric reactor (L2) work, the first relay (K1) is sucked to be subjected to short circuit.
Description
Technical field
The present invention relates to a kind of motor-driven control appliance.
Background technology
Generic drive only has single precharge structure, or pre-charge resistance adds the structure of direct current reactor.Single pre-charge resistance structure must be equipped with bigger capacitor's capacity and could normally move, thereby has increased the volume of driver.And voltge surge greatly appears in the electric current variation meeting owing to the reactor of flowing through after electric voltage dropping recovers that adds reactor on bus, and the over voltage alarm that occurs causing owing to busbar voltage is too high can't normally move driver.
At present the busbar voltage device that passes through of the low-voltage of portioned product is for to adopt the half control rectification with rectifying part on the basis of generic drive, and its shortcoming is the control circuit more complicated, increase production cost of products and reduced the reliability of system.The busbar voltage device that this low-voltage that we propose is at present passed through has only increased by two relays in control, control circuit is simple relatively, and the also corresponding raising of the reliability of system.
Summary of the invention
The present invention overcomes the electric network electric voltage drop shortcoming big to the impact of busbar voltage with recovering the back, provides a kind of simple and reasonable, can in running, reduce the driver busbar voltage device that the impact of back busbar voltage is fallen and recovered to busbar voltage.
The present invention reverts to the pre-charge resistance charging with the inductance short circuit when voltage change ratio is big, when voltage change ratio slows down after, insert the reactance of bus direct current, thereby reduces behind the electric voltage dropping impact to the busbar voltage generation.
The concrete technical scheme of main circuit topological structure and control circuit is; Relay of parallel connection constitutes the precharge loop at the resistance two ends; Constitute the direct current reactor loop at two relays of direct current reactor side parallel connection; When the precharge loop works, two relay adhesives in direct current reactor loop are by short circuit.When direct current reactor was worked, the relay adhesive in precharge loop was by short circuit.Precharge loop and direct current reactor control loop are not worked simultaneously.
The present invention has simple and reasonable, and control is easy to advantage.
Description of drawings
The busbar voltage device sketch map that Fig. 1 passes through for the driver low-voltage.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
The busbar voltage device embodiment that Fig. 1 passes through for driver low-voltage of the present invention.Have 3 relays in the major loop of present embodiment, parallel connection first relay K 1 at pre-charge resistance Rf two ends is in the two ends of first direct current reactor L1 parallel connection, second relay K 2, in the two ends of second direct current reactor L2 parallel connection the 3rd relay K 3.Second relay K 2 and the 3rd relay K 3 are controlled by same control signal, and first relay K 1 adopts independent control signal control.At the initial stage of powering on, the adhesive of precharge loop, the speed that control voltage rises.After voltage rises to certain value, switch to the direct current reactor loop, can effectively reduce the ripple of bus current.When electric voltage dropping recovers, the direct current reactor loop is cut out to guarantee that the impact that busbar voltage rises reduces, after busbar voltage returns to certain numerical value,, recover normal operating state again with the incision of direct current reactance loop.Can effectively reduce the impact that electric voltage dropping recovers the back busbar voltage like this, guarantee the pollution of the stable and minimizing of pitch-variable system when low-voltage is passed through electrical network.
Claims (2)
1. the busbar voltage device that the driver low-voltage is passed through is characterized in that, two ends parallel connection first relay (K1) of the pre-charge resistance of described device (Rf) constitutes the precharge loop; At the two ends of first direct current reactor (L1) parallel connection second relay (K2),, constitute the direct current reactor loop at the two ends of second direct current reactor (L2) parallel connection the 3rd relay (K3); Precharge loop and direct current reactor control loop are not worked simultaneously.
2. the busbar voltage device that driver low-voltage according to claim 1 is passed through is characterized in that, described first relay (K1) is controlled by independent control signal, and second relay (K2) and the 3rd relay (K3) are controlled by same control signal; When described precharge loop works, described second relay (K2) and the 3rd relay (K3) adhesive are by short circuit; When described first direct current reactor (L1) and second direct current reactor (L2) work, first relay (K1) adhesive is by short circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103885395A CN102684466A (en) | 2011-11-29 | 2011-11-29 | Low-voltage ride-through bus voltage device of driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103885395A CN102684466A (en) | 2011-11-29 | 2011-11-29 | Low-voltage ride-through bus voltage device of driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102684466A true CN102684466A (en) | 2012-09-19 |
Family
ID=46815967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103885395A Pending CN102684466A (en) | 2011-11-29 | 2011-11-29 | Low-voltage ride-through bus voltage device of driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102684466A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08251936A (en) * | 1995-03-13 | 1996-09-27 | Yaskawa Electric Corp | Inrush current preventive circuit for voltage type inverter |
| CN1384598A (en) * | 2002-06-07 | 2002-12-11 | 清华大学 | Three-level voltage source inversion circuit for frequency-converting speed regulator of 6 KV asynchronous motor |
| CN1790853A (en) * | 2005-12-06 | 2006-06-21 | 电子科技大学 | Composite high temperature superconductive power fault current limiter |
| CN102013872A (en) * | 2009-09-04 | 2011-04-13 | 洛克威尔自动控制技术股份有限公司 | Dynamic braking for current source converter based drive |
-
2011
- 2011-11-29 CN CN2011103885395A patent/CN102684466A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08251936A (en) * | 1995-03-13 | 1996-09-27 | Yaskawa Electric Corp | Inrush current preventive circuit for voltage type inverter |
| CN1384598A (en) * | 2002-06-07 | 2002-12-11 | 清华大学 | Three-level voltage source inversion circuit for frequency-converting speed regulator of 6 KV asynchronous motor |
| CN1790853A (en) * | 2005-12-06 | 2006-06-21 | 电子科技大学 | Composite high temperature superconductive power fault current limiter |
| CN102013872A (en) * | 2009-09-04 | 2011-04-13 | 洛克威尔自动控制技术股份有限公司 | Dynamic braking for current source converter based drive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100083 Beijing city Haidian District Wangzhuang Road No. 1, Tsinghua Tongfang Technology Plaza, B block 23 layer Applicant after: BEIJING CORONA WEIYE TECHNOLOGY CO., LTD. Applicant after: Baoding Corona Control Equipment Co., Ltd. Address before: 100083 Beijing city Haidian District Wangzhuang Road No. 1, Tsinghua Tongfang Technology Plaza, B block 23 layer Applicant before: Beijing Corona Science & Technology Co., Ltd. Applicant before: Baoding Corona Control Equipment Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: BEIJING CORONA SCIENCE + TECHNOLOGY CO., LTD. TO: BEIJING KENUO WEIYE TECHNOLOGY CO., LTD. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |