Application
Widely used for oil and gas field: water injection pump,fuel supply pump,gas and oil pump,electric submersible pump,LGN,pressure pump,petroleum,petrochemical, pipeline
Power and electricity: induced draft fan, forced draught fan, primary fan,secondary fan, feed water pump,circulating pump,condensate pump, mortar pump,compressor, boiler,feed water pump
Metallurgy:sintering drawing fan, blast furnace blower, dusting blower,sulfur dioxide blower,ring cooling fan,combustion fan,slag washing pump,combustion fan,circulating pump,chemical liquid pump,dephosphorization pump,slurry pump,rolling mill,dust blower,ect.
Mining and cement:Exhaust fan at furnace head, high temperature fan,exhaust fan at furnace end, coal mill dirculating fan,raw mill circulating fan, cement mill circulating fan,ball mill fan,porcelain, fan for klin,high temperature
Municipal engineering:sewage pump, clean water pump, purifying pump, mixed-flow pump,oxygen blower
Chemistry and others: gas blower, roots blower, dusting blower,gas compressor,nitrogen, CO2, ammonia,sweetenfan,circulating pump, pressure pump, axial flow Sugar industry: feeder and presser,pharmaceutical,pharmacy and paper making: fan and water pump,rubber and plastic industry: internal mixer,forced fan, main ventilator, exhaust fan, air compressor, gas drainage pump,medium pump, draining pump, belt conveyor, roller press, primary and secondary mine hoist,feed water pump, ect. 
Introduction
Our vector control medium-voltage frequency drive that adopts advanced input phase-shifting rectification, innovative bridge inverter technology and optimized series superposition technology. It has the characteristics of high output power factor and low harmonic interference. The input and output current waveforms are very close to sine waveform, its "perfect non-harmonic" frequency converter.
Our MFD2 series medium-voltage frequency converter has the advantages of long-term stable and reliable operation, precise control,and pumps in industrial and mining enterprises, and reducing the operating and maintenance costs of the system, enhance the competconvenient maintenance, high operation efficiency and simple operation, significantly improving the operating conditions of motors, fans itiveness in production process and application of frequency converters.
Features
●Vector-control technology of frequency drive improves the control performance, especially in the non-fan pump operating conditions.
●Master-slave control and automatic control of power balance function, suitable for multi-motor system operating conditions, such as mine belt conveyor.
●Completely forward and reverse speed tracking start, waiting-time is reduced.
●Low-frequency and high-torque start-up, over-excitation deceleration further optimizes the start-up and stop time to meet the needs of special operating conditions.
●The control system adopts the serial structure of touch screen + PLC + main control board, reduces the data circulation, balances the data processing pressure of each module,and adopts serial communication in data transmission, which enhances the anti-interference ability of the system and ensures the long-term stable operation of the system.
●The main control core adopts the three-core combination control of DSP-ARM-FPG GA, integrating the most advanced motor vector control algorithm. The DSP with 100M frequency realizes the high-speed data processing and ensures the real-time performance of the system;The internal logic clock of FPGA is as high as 150M. The communication between modules is without delay, the data parallel processing speeds up the logic operation and the system protection.
●The simplification of the control system further reduces the quantities of peripheral devices, reduces the failure, and makes the long-term operation more reliable.
●The fiber-optic communication and optocoupler isolation ensures the complete isolation of strong and weak current, making the system more secure and reliable without interference.
●Because of the phase-shifting rectifier transformer which is used, the frequency converter will not produce obvious harmonic distortion to the power supply network.
●The design of machine structure is compact, reasonable layout, unique filter design which can make replacement of filter cotton during operation safely and reliably.
●The output current waveform is close to sine waveform, the harmonic content is < 2% , and the output efficiency is > 97%.
●The input power factor is 0.96, its no need of a compensation device of power factor for operation.
●The self-diagnosis and protection function of the fault is perfect, which can realize the long-term stable operation of the system.
●The control system is supplied by double power supply to ensure no power loss during the operation of the system.
●With friendly interface for English and Chinese parameter setting and fault checking.
Specification