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Big Pawer Electrical Technology Xiangyang Inc. Co., Ltd.

Sfc, Frequency Conversion, Soft Start manufacturer / supplier in China, offering High Voltage Synchronous Frequency Soft Starter, Mv Ydq Series Liquid Resistor Rotor Soft Starter, Htr Series High Voltage Thermal Resistor Soft Starter and so on.

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Supplier Homepage Product Specialized Electrical Equipment High Voltage Synchronous Frequency Soft Starter

High Voltage Synchronous Frequency Soft Starter

FOB Price: Get Latest Price
Min. Order: 1 Piece
Production Capacity: 500MW/Year
Transport Package: Wooden Case
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: SFC1-20000/10
  • Specification: quality grande A
  • HS Code: 85078030
  • Trademark: big pawer
  • Origin: Xiangyang Hube
Product Description
Product Description
1,Brief description
      SFC series high frequency soft start device made using static frequency synchronization soft start control, a specific structure and frequency soft starter unit, a frequency change from zero to the rated AC power supply, motor synchrotron start, synchronous motors and network technology synchronization soft switching technology, dedicated frequency soft start digital technology to achieve the same period in the medium-sized motor Frequency soft Start to obtain a significant priming effect and energy efficiency, and has high efficiency, high power factor, input and output harmonic small, high reliability, small starting current, secondary current shock no merit, is the ideal high-voltage inverter soft starter import substitution products.
2,  Working principle 
      SFC device using AC - DC - AC current converter, which rely on the reverse voltage inverter synchronous motor back EMF sensing implementation provided by thyristor commutation. Frequency Starting rotor still experiencing starting, low speed start, starting speed, synchronous Grid 4 process. System through the terminal voltage signal detected, do filter analysis to determine, after judging the true rotor position and speed, according to a certain control strategy generates a control signal for controlling the inverter output phase current (voltage) of the frequency, amplitude and phase size. According before starting a given start acceleration curve within the specified time into the motor at full speed. The system is controlled by the speed and current double closed-loop control, speed up the process of starting the system always maintain maximum current output.
3,Technical and performance parameters
Use standardQ/XDLXXX-2013
Installation LocationIndoor
Motor RequirementsHigh-voltage AC synchronous motor
Excitation requirementsAC brushless excitation
DC brush excitation
Control PowerAC220V
Starting time0-200S Can be set
The output voltage0- rated motor voltage
Output CurrentLess than 40% of motor rated current
Cooling methodForced air heat light +
Load TypeBF fans, centrifugal fans, compressors, pumps, turbines, etc.
4,System solutions and principles 
(1)   Main circuit diagram,12 pulse double loop
High Voltage Synchronous Frequency Soft Starter

5, Overall installation diagram
(1)    SFC installation diagram
High Voltage Synchronous Frequency Soft Starter

(2)    Transformer installation diagram
High Voltage Synchronous Frequency Soft Starter


  • Compact design and highest power density
  • Easy plant integration due to compact design and highly flexible configuration
  • Simple operator control with the userfriendly operator panel AOP30
  • High reliability and ruggedness through the use of extremely robust thyristor technology and fuseless design, combined with an intelligent response to external disturbances
  • Hasslefree integration into higher-level automation systems through analog and digital interfaces and PROFIBUS DP
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