CN201590792U - Compulsory turn-off triggering device of high-voltage soft-start thyristor - Google Patents
Compulsory turn-off triggering device of high-voltage soft-start thyristor Download PDFInfo
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- CN201590792U CN201590792U CN2009202981800U CN200920298180U CN201590792U CN 201590792 U CN201590792 U CN 201590792U CN 2009202981800 U CN2009202981800 U CN 2009202981800U CN 200920298180 U CN200920298180 U CN 200920298180U CN 201590792 U CN201590792 U CN 201590792U
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- thyristor
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- negative bias
- triggering device
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Abstract
The utility model discloses a compulsory turn-off triggering device of a high-voltage soft-start thyristor, which comprises high-voltage thyristor in-series sets and RC filters which are connected with the two ends of each set of high-voltage thyristor in parallel, and a gate pole of each set of high-voltage thyristor is connected with a negative bias power source through an amplifier. By adopting the technical scheme, the compulsory turn-off triggering device is beneficial to improving the performance of the high-voltage thyristor by applying a proper negative bias voltage onto the gate pole of each thyristor by means of compulsory turn-off, leads a component to be insensitive to factors generated by an anode terminal such as oscillating voltage, du/dt and the like, keeps a stable turn-off status, improves the characteristic of the du/dt, does not completely depend on the RC filters, greatly improves the reliability of the component and a high-voltage electrical machine when in starting, and is especially suitable for a power grid with bad quality, namely, an occasion with a large number of ultraharmonics.
Description
Technical field
The utility model relates to a kind of trigger equipment that turn-offs high-pressure thyristor that forces when soft start.
Background technology
The high pressure soft start is mainly used in starts various main equipment mesohigh motor; wherein core devices is made up of tens high-pressure thyristors; because high-pressure thyristor costs an arm and a leg, be the key that complete machine can reliability service how therefore to high-pressure thyristor protection.
At present, high-low pressure soft start both at home and abroad all is that thyristor turn-offs triggering mode naturally.In case owing to after the thyristor triggering and conducting, promptly be to remove the control gate signal, it is constant that device is still kept conducting, the peculiar characteristic of this thyristor is called holds up characteristic.After the conducting, be reduced to certain value (＜keep electric current) gradually as long as flow through the electric current of device, device can return to blocking state again, and this shutoff is called nature and turn-offs.Yet in turn off process,, after being conducting to the forward current zero passage, can't recover blocking-up immediately, but continue to have reverse current to flow through, until the element leakage flow valuve that the storage charge carrier disappears substantially and just tends towards stability afterwards owing to device charge storage effect.Therefore the variation of this part electric current will produce very big peak voltage and very high du/dt phenomenon on inductive load (motor load) circuit, thereby cause device breakdown and to high-voltage motor insulated infringement, so must adopt the RC filter to absorb peak voltage, and thyristor is very strict to RC parameter and quality requirements especially in high-tension circuit series connection utilization, and this makes the reliability of device in starting operation greatly reduce.
Summary of the invention
The purpose of this utility model provides a kind of operational reliability height, helps the high pressure soft start thyristor pressure shutoff trigger equipment of high-pressure thyristor performance improvement.
For achieving the above object, the utility model is by the following technical solutions:
The RC filter that the utility model comprises high-pressure thyristor series connection group and is connected in parallel on every group of high-pressure thyristor two ends, the gate pole of above-mentioned every group of high-pressure thyristor connects the negative bias power supply by amplifier.
Above-mentioned amplifier is a differential amplifier, and the input of differential amplifier connects buffer, and the input of buffer connects light signal and receives and conversion equipment.
Above-mentioned negative bias power supply is-the 5V supply convertor.
Above-mentioned-5V supply convertor connection pulse power transformer.
Adopt the utility model of technique scheme, adopt the method for forcing shutoff, by on gate circuit transistor gate, applying suitable negative bias voltage, thereby help the improvement of high-pressure thyristor performance, make the influence of factors such as oscillating voltage that device antianode end produces and du/dt insensitive, and keep stable blocking state; The characteristic of du/dt has improved simultaneously, and not exclusively depends on the RC filter, has promoted device and the high-voltage motor reliability in starting operation significantly, and particularly the electrical network quality is abominable, promptly contains the occasion of a large amount of high order harmonic components.
Description of drawings
Accompanying drawing is a circuit diagram of the present utility model.
Embodiment
As shown in the figure, the RC filter that the utility model comprises high-pressure thyristor series connection group and is connected in parallel on every group of high-pressure thyristor two ends, the gate pole of above-mentioned every group of high-pressure thyristor all connect the negative bias power supply by amplifier.
Be that example describes with one group of high-pressure thyristor in the present embodiment, the triggering structure of other thyristors is all identical.The gate pole of every group of high-pressure thyristor connects differential amplifier, and an input of differential amplifier connects buffer, and the input of buffer connects light signal and receives and conversion equipment; Another input of differential amplifier connects the negative bias power supply.In the present embodiment, the negative bias power supply is-5V, and it is provided by one-5V supply convertor, and-the 5V supply convertor also provides one+10V voltage to power to buffer.In addition ,-signal of 5V supply convertor provides by pulse power transformer.
Operation principle of the present utility model is:
After applying suitable negative bias voltage on the gate circuit transistor gate, help the improvement of high-pressure thyristor performance, make the influence of factors such as oscillating voltage that device antianode end produces and du/dt insensitive, and keep stable blocking state; The characteristic of du/dt has improved simultaneously, and not exclusively depends on the RC filter, has promoted device and the high-voltage motor reliability in starting operation significantly.
Claims (4)
1. a high pressure soft start thyristor forces to turn-off trigger equipment, the RC filter that it comprises high-pressure thyristor series connection group and is connected in parallel on every group of high-pressure thyristor two ends is characterized in that: the gate pole of described every group of high-pressure thyristor connects the negative bias power supply by amplifier.
2. high pressure soft start thyristor according to claim 1 forces to turn-off trigger equipment, it is characterized in that: described amplifier is a differential amplifier, the input of differential amplifier connects buffer, and the input of buffer connects light signal and receives and conversion equipment.
3. high pressure soft start thyristor according to claim 1 is forced to turn-off trigger equipment, it is characterized in that: described negative bias power supply is-the 5V supply convertor.
4. high pressure soft start thyristor according to claim 3 is forced to turn-off trigger equipment, it is characterized in that: described-5V supply convertor connects pulse power transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202981800U CN201590792U (en) | 2009-12-29 | 2009-12-29 | Compulsory turn-off triggering device of high-voltage soft-start thyristor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202981800U CN201590792U (en) | 2009-12-29 | 2009-12-29 | Compulsory turn-off triggering device of high-voltage soft-start thyristor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590792U true CN201590792U (en) | 2010-09-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202981800U Expired - Lifetime CN201590792U (en) | 2009-12-29 | 2009-12-29 | Compulsory turn-off triggering device of high-voltage soft-start thyristor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201590792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698683A (en) * | 2017-10-23 | 2019-04-30 | 新乡市振源电器股份有限公司 | The driving device and high-tension apparatus of high-pressure thyristor |
| CN112803462A (en) * | 2021-03-05 | 2021-05-14 | 上海电气集团股份有限公司 | Forced turn-off method of static transfer switch based on energy storage converter |
-
2009
- 2009-12-29 CN CN2009202981800U patent/CN201590792U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698683A (en) * | 2017-10-23 | 2019-04-30 | 新乡市振源电器股份有限公司 | The driving device and high-tension apparatus of high-pressure thyristor |
| CN112803462A (en) * | 2021-03-05 | 2021-05-14 | 上海电气集团股份有限公司 | Forced turn-off method of static transfer switch based on energy storage converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XINXIANG ZHENYUAN ELECTRIC LIMITED BY SHARE LTD. Free format text: FORMER NAME: XINXIANG ZHENYUAN ELECTRIC LIMITED |
|
| CP03 | Change of name, title or address |
Address after: 453000 E3 block, torch garden, Xinxiang Development Zone, Henan, China Patentee after: Vibration source electrical equipment limited company of Xinxiang City Address before: 453000 E3 block, pioneer torch garden, Xinxiang Development Zone, Henan Patentee before: Xinxiang Zhenyuan Electric Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100922 |
|
| CX01 | Expiry of patent term |