CN201328095Y - Mineral flame-proof type variable-frequency high-voltage soft start device - Google Patents
Mineral flame-proof type variable-frequency high-voltage soft start device Download PDFInfo
- Publication number
- CN201328095Y CN201328095Y CNU200820230098XU CN200820230098U CN201328095Y CN 201328095 Y CN201328095 Y CN 201328095Y CN U200820230098X U CNU200820230098X U CN U200820230098XU CN 200820230098 U CN200820230098 U CN 200820230098U CN 201328095 Y CN201328095 Y CN 201328095Y
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- isolating switch
- voltage
- inverter
- switch
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- Motor And Converter Starters (AREA)
Abstract
The utility model discloses a mineral flame-proof type variable-frequency high-voltage soft start device; a three-phase AC power is induced into a flame-proof cavity by an input terminal; the input terminal is connected with an input isolating switch through a lead; the input isolating switch is connected with a rectifier through a lead; the rectifier is connected with a filter through a lead; the filter is connected with an inverter through a lead; the inverter is connected with an output isolating switch through a lead; the output isolating switch is connected with an output terminal through a lead; the input terminal is connected with a bypass switch through a lead; the bypass switch is connected with the output terminal through a lead; and a controller is connected with the input isolating switch, the filter, the inverter, the output isolating switch and the bypass switch through leads. As variable voltage and variable frequency are employed to realize the soft start of high-voltage large-power AC electromotor, the mineral flame-proof type variable-frequency high-voltage soft start device is employed to start the high-voltage electromotor with constant torque and improve the load-bearing ability of the soft start device.
Description
Technical field
The utility model belongs to a kind of flame-proof mine high-voltage AC motor soft starting device, particularly a kind of high pressure soft starting device of variable-frequency variable-voltage.
Background technology
In order to reduce the high-tension motor starting current, reduce motor starting procedure to the impact of electrical network and to the protection of load, more powerful high voltage motor needs start with soft initiator.At present, common high pressure soft starting device mainly contains types such as electronic type, magnet controlled and automated fluid resistance-type on the market, and electronic type is most with the thyristor voltage regulation type.Thyristor type high pressure soft starting device is three groups of forward and reverse thyristors in parallel that are serially connected between power supply and the motor, realize AC voltage adjusting by control triggering and conducting angle, it is available that the Starting mode of thyristor type soft initiator has ramp voltage type, kick to add ramp voltage type and current-limiting type etc.Its essence is by regulating output voltage the voltage drop when reaching the control startup, the purpose of limiting starting current.General soft initiator adopts not frequency reducing of step-down to start, and can reduce starting current, but torque also reduced a lot, and application is restricted, and is especially relatively poor for constant torque load soft start effect.
Summary of the invention
The purpose of this utility model provides a kind of based on variable frequency control flame-proof mine high voltage motor soft starting device.
For achieving the above object, solution of the present utility model is: a kind of mine explosion-suppression high-pressure frequency-conversion soft starter device, by explosion-proof chamber, with the input terminal of in explosion-proof chamber, installing, the input isolating switch, rectifier, filter, inverter, the output isolating switch, lead-out terminal, by-pass switch and controller are formed, described three-phase alternating-current supply is introduced explosion-proof chamber by described input terminal, described input terminal is connected with the input isolating switch by lead, described input isolating switch is connected with rectifier by lead, described rectifier is connected with filter by lead, described filter is connected with inverter by lead, described inverter is connected with the output isolating switch by lead, described output isolating switch is connected with lead-out terminal by lead, described input terminal is connected with by-pass switch by lead, described by-pass switch is connected with lead-out terminal by lead, and described controller is by lead and input isolating switch, filter, inverter, the output isolating switch, by-pass switch connects.
Summary of the invention is mainly by controller control input isolating switch, output isolating switch, by-pass switch, filter, inverter, the controller control inverter adopts the voltage space vector pwm theory pulse width modulation mode, adopt voltage close loop, current cut-off negative feedback control mode, realize output variable voltage variable frequency function, reach restriction, realize soft start function the high voltage motor starting current.Voltage close loop is controlled real-time dynamic adjustments inverter output voltage, and effective control inverter output voltage has avoided inverter output voltage to change with the fluctuation of electrical network input voltage.During overweight or stall, current cut-off negative feedback control has effectively limited the inverter output current, guarantees that motor output torque is constant, realizes " excavator " characteristic, realizes not having tripping operation control when motor load.
Adopt above-mentioned variable frequency control flame-proof mine high voltage motor soft starting device, realize high-power alternating current motor soft start owing to adopt variable voltage variable frequency, voltage and frequency begin to rise by zero, and maintenance constant voltage and frequency ratio, the permanent torque that has realized high-tension motor starts, and starts shipment the breakdown torque that torque can reach motor, has limited starting current, and keep maximum detent torque constant, improved the load capacity of soft starter.Start shipment the time, detent torque is adjustable, and is easy to use.Use this device can prolong motor and mechanical life-span in the electric drive system, electrical network is not impacted, do not influence the normal operation of other power equipment on the electrical network.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
As shown in Figure 1, the three-phase alternating-current supply of this mine explosion-suppression high-pressure frequency-conversion soft starter device is introduced explosion-proof chamber by input terminal 1, described input terminal 1 is connected with input isolating switch 2 by lead, described input isolating switch 2 is connected with rectifier 3 by lead, described rectifier 3 is connected with filter 4 by lead, described filter 4 is connected with inverter 5 by lead, described inverter 5 is connected with output isolating switch 6 by lead, and described output isolating switch 6 is connected with lead-out terminal 7 by lead.Described input terminal 1 is connected with by-pass switch 8 by lead, and described by-pass switch 8 is connected with lead-out terminal 7 by lead.Described controller 9 is connected with input isolating switch 2, filter 4, inverter 5, output isolating switch 6, by-pass switch 8 by lead.
Flame-proof mine frequency conversion high pressure soft starting device, all components and parts are installed in the explosion-proof chamber, and soft initiator adopts V/F variable-frequency variable-voltage scheme, makes it to finish under reliable software and hardware and control strategy the variable-frequency variable-voltage soft start of high-voltage motor.Adopt controller to finish, make the soft start reliability service importing the real-time control and the integrated protection of isolating switch, filter, inverter, output isolating switch, by-pass switch.Generally speaking, motor is moving under rated speed behind the soft start, therefore, this device is provided with by-pass switch, connects the by-pass switch soft initiator by short circuit behind soft starter for motor, reduces switching loss with this, the heat abstractor of high-power electronic device also need not be set, save cost.When motor needs soft stop, can turn-off by-pass switch, by soft initiator control motor soft stop.
Claims (1)
1. mine explosion-suppression high-pressure frequency-conversion soft starter device, by explosion-proof chamber, with the input terminal of in explosion-proof chamber, installing, the input isolating switch, rectifier, filter, inverter, the output isolating switch, lead-out terminal, by-pass switch and controller are formed, it is characterized in that: described three-phase alternating-current supply is introduced explosion-proof chamber by described input terminal (1), described input terminal (1) is connected with input isolating switch (2) by lead, described input isolating switch (2) is connected with rectifier (3) by lead, described rectifier (3) is connected with filter (4) by lead, described filter (4) is connected with inverter (5) by lead, described inverter (5) is connected with output isolating switch (6) by lead, described output isolating switch (6) is connected with lead-out terminal (7) by lead, described input terminal (1) is connected with by-pass switch (8) by lead, described by-pass switch (8) is connected with lead-out terminal (7) by lead, and described controller (9) is by lead and input isolating switch (2), filter (4), inverter (5), output isolating switch (6), by-pass switch (8) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820230098XU CN201328095Y (en) | 2008-12-15 | 2008-12-15 | Mineral flame-proof type variable-frequency high-voltage soft start device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820230098XU CN201328095Y (en) | 2008-12-15 | 2008-12-15 | Mineral flame-proof type variable-frequency high-voltage soft start device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201328095Y true CN201328095Y (en) | 2009-10-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820230098XU Expired - Fee Related CN201328095Y (en) | 2008-12-15 | 2008-12-15 | Mineral flame-proof type variable-frequency high-voltage soft start device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201328095Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860225A (en) * | 2010-03-29 | 2010-10-13 | 北京利德华福电气技术有限公司 | Alternating current inversion type pre-charging circuit for high-voltage frequency converter and control method thereof |
| US8587240B2 (en) | 2011-07-20 | 2013-11-19 | Eaton Corporation | Operationally dependent filtering for soft starter current measurements |
| CN110176876A (en) * | 2019-06-10 | 2019-08-27 | 长沙瀚鹏电子技术有限公司 | A kind of steel rail grinding operation-control system |
-
2008
- 2008-12-15 CN CNU200820230098XU patent/CN201328095Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860225A (en) * | 2010-03-29 | 2010-10-13 | 北京利德华福电气技术有限公司 | Alternating current inversion type pre-charging circuit for high-voltage frequency converter and control method thereof |
| US8587240B2 (en) | 2011-07-20 | 2013-11-19 | Eaton Corporation | Operationally dependent filtering for soft starter current measurements |
| CN110176876A (en) * | 2019-06-10 | 2019-08-27 | 长沙瀚鹏电子技术有限公司 | A kind of steel rail grinding operation-control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20111215 |