CN101330264A - Soft starter for middle-high voltage solid motor - Google Patents
Soft starter for middle-high voltage solid motor Download PDFInfo
- Publication number
- CN101330264A CN101330264A CNA2008100412665A CN200810041266A CN101330264A CN 101330264 A CN101330264 A CN 101330264A CN A2008100412665 A CNA2008100412665 A CN A2008100412665A CN 200810041266 A CN200810041266 A CN 200810041266A CN 101330264 A CN101330264 A CN 101330264A
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- China
- Prior art keywords
- protection
- motor
- soft starter
- motor soft
- silicon controlled
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- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to a motor soft starter, more particularly a full digital-control middle/high voltage solid motor soft starter. The motor soft starter mainly comprises a digital microcomputer controller, a control power supply transformer, a power supply isolating switch, a power supply fuse protector, a main vacuum controller, a thermal overload relay, a bypass vacuum contactor and a silicon controlled rectifier module. Compared with the prior art, the motor soft starter which is formed by the series/parallel connection of a plurality of silicon controlled rectifiers, can meet the requirements of different current and voltage grades, control the output voltage by regulating the trigger angle of each silicon controlled rectifier; reduce the electrical and mechanical shocks on the power network, the motor and the linked equipment during the start-up process of the motor; and monitor the motor and provide the fault protection function after the motor start-up is completed.
Description
[technical field]
The present invention relates to a kind of motor soft starter, especially a kind of middle and high motor soft starter that presses solidly attitude of digital control.
[technical background]
At present, known soft-starter control function and imperfection and lack a lot of defencive functions, as the impact of the electric current in motor starting, the stopped process, net capacity height, impact of machinery etc. during electric motor starting.For example as most widely used squirrel cage asynchronous motor, it adopts the condition of reduced voltage starting: the one, and during motor starting, machinery can not bear the impact torque of direct-on-line starting; The 2nd, during motor starting, its terminal voltage can not satisfy code requirement; The 3rd, during motor starting, influence the normal operation of other loads.
[summary of the invention]
In order to overcome the deficiency of present motor soft starter, it is very perfect and the motor soft starter of kinds of protect function arranged to the present invention relates to a kind of controlled function.It is to form with many controllable silicon connection in series-parallel, can satisfy different electric currents and electric pressure requirement, the size that control silicon controlled trigger angle just can control output voltage.In motor starting process, the terminal voltage that increases motor according to predefined starting curve is smoothly quickened motor, thus when having reduced electric motor starting to the electric and mechanical shock of electrical network, motor itself and associated devices.After motor reached rated speed, bypass contactor was connected.After electric motor starting finished, soft starter continued the monitoring motor and various error protections is provided.The terminal voltage that at first reduces motor smoothly according to pre-set shutdown curve when soft stop is shut down up to motor.Softly stop to solve relevant issues such as water pump water hammer that unexpected shutdown causes and mechanical shock.
The technical solution adopted for the present invention to solve the technical problems is: in motor soft starter, add have the pulse kick, big electric current disconnects, pump stops, built-in electronic overload protection (optional), open phase protection, overcurrent protection, overheat protector, and has self diagnosis and function such as energy-conservation.
The invention has the beneficial effects as follows that controllable silicon is contactless electronic device, the product that is different from other types need often be safeguarded conducting liquid and parts etc., becoming electronic component useful life mechanical endurance, moves the several years continuously also to need not to shut down and safeguard; A complete electric motor starting control and a protection system, only need connect power line and motor lines during installation can put into operation; Before the operation that adds high pressure, allow to use low pressure that whole system is carried out machinery and electric test; HPMV-DN has from detecting, self study and the function of start-up parameters is set automatically.
[embodiment]
When using soft starter of the present invention, the output voltage of thyristor increases gradually, and motor quickens to know the full conducting of thyristor gradually, motor is operated on the mechanical property of rated operational voltage, realize level and smooth the startup, reduce starting current, avoid starting overcurrent tripping.When treating that motor reaches rated revolution, start-up course finishes, soft initiator replaces the thyristor of having finished the work from employing bypass contactor, be motor normal operation rated voltage, reduced the thermal losses of thyristor, prolong the useful life of soft initiator, improve its operating efficiency, make electrical network avoid harmonic pollution again.Soft initiator of the present invention also provides open phase protection, overcurrent protection, overheat protector, and has self diagnosis and function such as energy-conservation.
Claims (3)
1. a middle and high motor soft starter that presses solidly attitude is characterized in that: mainly by digital microcomputerized controller, control power transformer, power-supply isolation switch, main fuse, main vacuum controller, thermal overload relay, the bypass vacuum contactor, silicon controlled module is formed.
2. a kind of middle and high motor soft starter that presses solidly attitude according to claim 1, it is characterized in that: loadtype is phase asynchronous or synchronous machine, operating voltage 2.3X10
3-13.8X10
3V, ambient temperature 0-50 ℃ of C, height above sea level 0-1000M, relative humidity 5-95%.
3. a kind of middle and high motor soft starter that presses solidly attitude according to claim 1 is characterized in that: short-circuit protection, overvoltage protection; under-voltage protection, overload protection, underload protection; open-phase protection, phase sequence, overtemperature protection; rotation-clogging protection, frequency protection, earth-leakage protection; the current imbalance protection; the motor temperature protection, power factory monitoring, repeated priming time restriction function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100412665A CN101330264A (en) | 2008-08-01 | 2008-08-01 | Soft starter for middle-high voltage solid motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100412665A CN101330264A (en) | 2008-08-01 | 2008-08-01 | Soft starter for middle-high voltage solid motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101330264A true CN101330264A (en) | 2008-12-24 |
Family
ID=40205905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100412665A Pending CN101330264A (en) | 2008-08-01 | 2008-08-01 | Soft starter for middle-high voltage solid motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101330264A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577191B (en) * | 2009-06-02 | 2011-02-02 | 深圳市英唐数码电器有限公司 | Protection circuit for protecting contact point of relay in high-power circuit |
| CN103501134A (en) * | 2013-10-11 | 2014-01-08 | 昆山市润苏物资有限公司 | Soft starter for squirrel-cage motor |
| CN111758035A (en) * | 2018-02-27 | 2020-10-09 | 德恩塞两合公司 | Method for evaluating the state and quality of a low-voltage network |
-
2008
- 2008-08-01 CN CNA2008100412665A patent/CN101330264A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577191B (en) * | 2009-06-02 | 2011-02-02 | 深圳市英唐数码电器有限公司 | Protection circuit for protecting contact point of relay in high-power circuit |
| CN103501134A (en) * | 2013-10-11 | 2014-01-08 | 昆山市润苏物资有限公司 | Soft starter for squirrel-cage motor |
| CN111758035A (en) * | 2018-02-27 | 2020-10-09 | 德恩塞两合公司 | Method for evaluating the state and quality of a low-voltage network |
| CN111758035B (en) * | 2018-02-27 | 2023-06-30 | 德恩塞欧洲股份公司 | Method for evaluating the state and quality of a low-voltage network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081224 |