CN203219171U - Instantaneous power-fail protection device for mine high-voltage frequency converter - Google Patents
Instantaneous power-fail protection device for mine high-voltage frequency converter Download PDFInfo
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- CN203219171U CN203219171U CN 201320140177 CN201320140177U CN203219171U CN 203219171 U CN203219171 U CN 203219171U CN 201320140177 CN201320140177 CN 201320140177 CN 201320140177 U CN201320140177 U CN 201320140177U CN 203219171 U CN203219171 U CN 203219171U
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- frequency converter
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- power supply
- instantaneous power
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Abstract
The utility model relates to an instantaneous power-fail protection device for a mine high-voltage frequency converter. The instantaneous power-fail protection device comprises a rectification unit, an inversion unit and an energy-storage capacitor. The rectification unit is connected with the inversion unit, and the energy-storage capacitor is connected between an anode of a DC output bus and a cathode of the DC output bus of the rectification unit. The instantaneous power-fail protection device also comprises a LC filtering unit and a frequency converter main-control unit. Detection input ends of the frequency converter main-control unit are respectively connected with the inversion unit and the LC filtering unit, and the output end of the frequency converter main-control unit is connected with the rectification unit; and a power-failure leap-over device for an auxiliary power supply is disposed inside the frequency converter main-control unit. A follow current device is disposed inside the inversion unit.
Description
Technical field
The utility model relates to electric and electronic technical field, specifically, relates to a kind of mining high-voltage frequency converter instantaneous power-down protective device.
Background technology
Operating condition under the coal mine generally all compares badly, and power consumption equipment is than many, and place capacity is big, adopts high voltage converter as electrod driving device usually.In the coal mining process, the equipment operating load is big, the situation of equipment instant cut-off often occurs, and safety in production is brought adverse effect.Traditional frequency converter does not have power-down protection apparatus, and frequency converter namely trips and quits work behind system's main power source momentary power failure, after system restores electricity; frequency converter still can not move automatically; operations such as needs manually charge again, parameter reset, startup are wasted time and energy, and influence production efficiency.
The utility model content
The utility model lacks power-down protection apparatus at existing mine-used frequency-converter system; frequency converter quits work after the outage of main power source short time; restart the problem that wastes time and energy, a kind of safe and reliable, mining high-voltage frequency converter instantaneous power-down protective device of being swift in response, can realizing to continue to keep after frequency converter input power supply instantaneous (＜=5 second) outage frequency converter operation is provided.
The technical solution of the utility model is: a kind of mining high-voltage frequency converter instantaneous power-down protective device, comprise rectification unit, inversion unit and storage capacitor, rectification unit links to each other with inversion unit, storage capacitor is connected between the direct current output bus both positive and negative polarity of rectification unit, this device also comprises LC filter unit and frequency converter main control unit, the frequency converter main control unit detects input and links to each other with the LC filter unit with inversion unit respectively, and output links to each other with rectification unit; Frequency converter main control unit inside is provided with accessory power supply dead electricity crossover device; Described inversion unit inside is provided with current following device.
Preferably: described current following device is fly-wheel diode.
Preferably: described accessory power supply dead electricity crossover device comprises control unit circuit, frequency converter main controller and the power supply device that is connected with the control unit circuit, power supply device is the control unit circuit supply, and described power supply device is connected with the frequency converter main controller respectively with the control unit circuit.
Preferably: described power supply device is ups power.
The beneficial effects of the utility model are: the utility model has been studied a kind of mining high-voltage frequency converter instantaneous power-down protective device; this device is provided with the frequency converter main control unit; this unit can detect the power supply signal of main circuit; when frequency converter input power cut-off; react immediately; the electric energy that control produces the motor rotation feeds back to the current following device of inversion unit, keeps frequency converter work by keeping busbar voltage.The accessory power supply dead electricity crossover device of this device main control unit inside is provided with ups power, can realize importing the power supply dead electricity after main control unit continue to keep work, safe and reliable.
Description of drawings
Accompanying drawing 1 is theory structure schematic diagram of the present utility model.
Accompanying drawing 2 is that the utility model tool accessory power supply dead electricity is crossed over structural representation.
Embodiment
The utility model is described in more detail below in conjunction with accompanying drawing.
The utility model specific embodiment shown in Fig. 1 to 2: a kind of mining high-voltage frequency converter instantaneous power-down protective device; comprise rectification unit; storage capacitor; inversion unit; rectification unit links to each other with inversion unit; storage capacitor is connected between the direct current output bus both positive and negative polarity of rectification unit; it is characterized in that: this device also comprises the LC filter unit; the frequency converter main control unit; the inverter signal of LC filter unit control inversion unit output smoothing; eliminate the voltage reflection in the motor cable; the electric energy that in the dead electricity process motor rotation is produced feeds back to inversion unit simultaneously; the frequency converter main control unit detects input and inversion unit; the LC filter unit links to each other; output links to each other with rectification unit, and frequency converter main control unit inside is provided with accessory power supply dead electricity crossover device.
Be provided with fly-wheel diode in the inversion unit as current following device.
Accessory power supply dead electricity crossover device comprises power supply device, frequency converter main controller and control unit circuit.
Power supply device is ups power.
During work; set power-down protection apparatus startup work by the frequency converter main control unit; the frequency converter main control unit is by the input signal of inversion unit and LC filter unit; detect the voltage signal of main circuit; when primary power source de-energizes; main circuit voltage reduces; storage capacitor begins discharge; keep the motor rotation; the frequency converter main controller detects the UPS signal simultaneously; ups power is started working, for the power supply of frequency converter main control unit, keep main control unit work as auxiliary power supply device; the electric energy that the rotation of control motor produces feeds back to inversion unit by the LC filter unit; fly-wheel diode by inversion unit feeds back to dc bus, and it is stable to keep DC bus-bar voltage, continues as frequency converter the energy of keeping its operation is provided.
Claims (4)
1. mining high-voltage frequency converter instantaneous power-down protective device, comprise rectification unit, inversion unit and storage capacitor, rectification unit links to each other with inversion unit, storage capacitor is connected between the direct current output bus both positive and negative polarity of rectification unit, it is characterized in that: this device also comprises LC filter unit and frequency converter main control unit, the frequency converter main control unit detects input and links to each other with the LC filter unit with inversion unit respectively, and output links to each other with rectification unit; Frequency converter main control unit inside is provided with accessory power supply dead electricity crossover device; Described inversion unit inside is provided with current following device.
2. mining high-voltage frequency converter instantaneous power-down protective device as claimed in claim 1, it is characterized in that: described current following device is fly-wheel diode.
3. mining high-voltage frequency converter instantaneous power-down protective device as claimed in claim 1; it is characterized in that: described accessory power supply dead electricity crossover device comprises control unit circuit, frequency converter main controller and the power supply device that is connected with the control unit circuit; power supply device is the control unit circuit supply, and described power supply device is connected with the frequency converter main controller respectively with the control unit circuit.
4. mining high-voltage frequency converter instantaneous power-down protective device as claimed in claim 3, it is characterized in that: described power supply device is ups power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320140177 CN203219171U (en) | 2013-03-26 | 2013-03-26 | Instantaneous power-fail protection device for mine high-voltage frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320140177 CN203219171U (en) | 2013-03-26 | 2013-03-26 | Instantaneous power-fail protection device for mine high-voltage frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203219171U true CN203219171U (en) | 2013-09-25 |
Family
ID=49208672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320140177 Expired - Lifetime CN203219171U (en) | 2013-03-26 | 2013-03-26 | Instantaneous power-fail protection device for mine high-voltage frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203219171U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105227042A (en) * | 2015-10-15 | 2016-01-06 | 中国人民解放军海军工程大学 | The dead electricity of high-power high voltage frequency converter crosses over control method |
| CN111106787A (en) * | 2019-12-23 | 2020-05-05 | 浙江佳乐科仪股份有限公司 | Instantaneous power failure detection and energy feedback method for frequency converter |
| CN113282026A (en) * | 2021-04-16 | 2021-08-20 | 矿冶科技集团有限公司 | Mining information acquisition and fault diagnosis device and method |
-
2013
- 2013-03-26 CN CN 201320140177 patent/CN203219171U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105227042A (en) * | 2015-10-15 | 2016-01-06 | 中国人民解放军海军工程大学 | The dead electricity of high-power high voltage frequency converter crosses over control method |
| CN105227042B (en) * | 2015-10-15 | 2019-01-25 | 中国人民解放军海军工程大学 | The power loss of high-power high voltage frequency converter crosses over control method |
| CN111106787A (en) * | 2019-12-23 | 2020-05-05 | 浙江佳乐科仪股份有限公司 | Instantaneous power failure detection and energy feedback method for frequency converter |
| CN113282026A (en) * | 2021-04-16 | 2021-08-20 | 矿冶科技集团有限公司 | Mining information acquisition and fault diagnosis device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 266400 2299 Hai Xi Road, Huangdao District, Qingdao, Shandong Patentee after: HUAXIA TIANXIN INTELLIGENT INTERNET OF THINGS Co.,Ltd. Address before: 266000 Shandong Qingdao Shandong Qingdao 176 Jiaonan economic and Technological Development Zone Haixi South Road No. Patentee before: Qingdao Tianxin Electric Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |
|
| CX01 | Expiry of patent term |