MV VFD AC Motor Drive 3KV 6KV 10KV

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Specifications of MV VFD AC Motor Drive 3KV 6KV 10KV


Direct medium voltage input and output 


IGBT power units in series to obtain MV by means of overlap wave 


Up to 40% saving rate


Application Fields of MV VFD AC Motor Drive 3KV 6KV 10KV

  • Power Generation: Induced draft fan, forced draft fan, condensate pump, feed pump, primary air fan, secondary air fan, booster fan, circulating pump, mill fan, slurry pump etc

  • Cement: draft fan, high-temperature fan, air blower, dust collection fan etc.

  • Metallurgy: blast furnace blower, slurry pump, feed water pump, dust fan, compressor etc.

  • Petroleum&Chemical: Water injection pump, crude oil pump, Compressor, fan, circulation pump, etc

  • Urban water supply: Water delivery pump, water intake pump, water supply pump, sewage treatment industry, self-fractionating pump etc

  • Minerals & Mining: Mud pump, ventilation fan, slurry pump etc


Others: Loads such as fan, pump and compressor in pharmaceutical, paper making and wind tunnel test.

Especially for: Fan and Pump


Power Plant

Pump, Fans

Steel Plant


Cement Plant




Product Structure of MV VFD AC Motor Drive 3KV 6KV 10KV

AC Motor Drive Variable Frequency Drive consists of By-pass cabinet, Transformer cabinet, power unit cabinet and controller cabinet from left to right.



AC Motor Drive MV Variable Frequency Drive



Technical advantages of MV VFD AC Motor Drive 3KV 6KV 10KV

  • No need of extra output filtering device

  • Directly driving the general medium voltage synchronous or asynchronous motor and the temperature of the motor will not be increased.

  • No need of motor derating operation

  • No dv/dt damage to insulation of motor and cable

  • No torque ripple induced by harmonics, and the service life of motors and mechanism devices can be extended

  • No cable length limited when voltage drop is in the allowable range.

Besides the above advantages, AC Motor Drive MV Variable Frequency Drive has the following functions and features:

  • Protection of overload, overheat, over-current, open-phase, grounding, over-voltage, negative sequence.

  • Current limited function

  • Interlock protection of control power supply

  • Two sets of control power hot standby for redundancy

  • Power cell by-pass function

  • Control cabinet automatic bypass function

  • Cabinet door opening alarm function

  • Lock-phase function

  • Synchronizing switch function between variable frequency and power frequency (optional)

  • Soft start of motors, no impact to mechanical equipment and network

  • Voltage source High-high variable frequency drive, it can realize No-step speed regulation, which makes the typical motors into intelligent motors.

  • High quality power input: By phase shifting of the secondary winding and multi-pulse diode rectifier, isolated powers can be acquired and supplied for power cells. (18 pulses for 3/3.3kV, 30/36 pulses for 6/6.6kV, 48/54 pulses for 10/11kV) By using the technique of multi-pulse rectifier, the harmonic current could be eliminated greatly.

  • Power cell communicate with controller through optic-fiber, completely electric isolated

  • Inner set PID regulator, can realize running in closed-loop

  • Multiple communication methods with host computer, isolated RS485 interface, standard MODBUS RTU, communication protocol, PROFIBUS DP (optional), industrial Ethernet communication protocol (optional)

  • Accurately fault records, can inquiry information and locate fault

  • Compact construction, reasonable layout (can do customer-design)

  • Very good protective design to dust, ferrum pulveratum, acid mist, moisture etc.

  • Bypass cabinethas a function of "five-protection", meanwhile, it has a pressure relief channel to ensure the safety of operators.

  • Modularized design of power units, interchangeable and easy to produce and repair.

Technical parameters of MV VFD AC Motor Drive

Series No




HVF Capacity(KVA)



Power of adaptive motor(KW)



Input Frequency(Hz)



Rated input voltage(kV)

3/3.3kV/4.16kV/6/6.6kV/10/11kV (+15%~ -35%)


THDi at power grid

<3% (Permissible value≤4%)


THDu at output side

<3% (Permissible value≤5%)


Input power factor

>0.95%(>20% of rated load)



>97%(under a rated load)


Output frequency(Hz)



Output frequency resolution



Rated output current(A)



Overload capability

120%(1min), 150%(3s), 200%(Immediate protection)


Control mode

V/F control or Vector control


Logical control I/O signal

16 channels respectively


Analog input



Analog output

0~10V/4~20mA Optional (2 channels)


Boolean input/output

Communications/Default point (expandable)


Acc & Dec time (S)



Communication with host

CAN, Profibus, Modbus, RS232, RS485 etc


Cooling mode

Forced air cooling


Storage temperature



Ambient temperature



Ambient humidity

95%, no condensation


Protection grade






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Q:Lenovo laptop power adapter side of the feet which is positive
Power adapter is a small portable electronic equipment and electrical and electronic power supply conversion equipment, generally by the shell, power transformer and rectifier circuit, according to its output type can be divided into AC output and DC output type; by way of connection Divided into wall and desktop.
Q:What is the difference when using inverter frequency conversion ordinary motor and variable frequency inverter motor
First of all you have to understand the difference between variable frequency motor and ordinary asynchronous motor. 1, inverter motor cooling fan is not connected with the motor spindle, is independent, the fan rotation from the motor speed, to ensure that the motor cooling.
Q:Is the inverter output current proportional to the output torque?
The output voltage of the inverter is proportional to the frequency, which is to keep the motor flux constant, T = KIφ so the motor output torque is proportional to the inverter current.
Q:What are the AC motor speed control methods? What are the characteristics of each
Pressure control speed, limited speed range is limited use of variable pole speed, change the motor internal wiring speed, speed is a very speed according to the motor factory set to brand speed to speed control, change the motor input Frequency to speed, are stepless speed is now more popular
Q:How to disassemble the notebook power adapter
HP laptop power adapter for the whole design of small sealed, you can follow the following steps to dismantle: 1, laptop power adapter for the injection molding package or with a strong adhesive glue, without any screws, so generally only with violence Cracked. However, as long as the method properly, after the dismantling of the power adapter can be restored to the original, do not carefully observe almost no traces of open.
Q:How does the spindle drive system of the inverter realize the positive and negative control of the main pole?
The general inverter has an external terminal control and communication control two modes optional, select one of them can be completed ah
Q:The emitter E of the inverter inverter module and the AC output U are not directly connected together
Corresponding to a phase of the branch of the IGBT inverter module generally appear in pairs
Q:Laptop warranty period is not over, the power adapter is broken, repair money?
Do not money, first to see where the dealer, if there is no answer, went directly to the repair station, with a good warranty card and other things, that reason you can! The
Q:Is the laptop power adapter hot?
Third, the power of the nominal voltage than my books the battery voltage is much higher, not an accident, right? First of all, to know is that the power supply to the books and the battery power supply to the notebook is different. Battery-powered, the battery output is pure DC, very clean, the battery voltage is neither possible nor need to design a high, lithium battery chemical properties determine a cell output voltage can only be about 3.6V, so Many batteries are used in three cascade way, 10.8V also became a very popular battery voltage. Some batteries are slightly larger than the integer value of 3.6V, such as 3.7V or 11.2V, etc., in fact, to protect the battery. Power supply, the situation is more complex, first of all need to add voltage to further regulation filter to ensure that the power performance is not very good in the case of stable work, the voltage regulator after the two parts of the city, all the way to the work of the power supply , The other way to the battery charge to the part of the power supply to the battery when the same power supply, and the part of the battery charge through the battery charge control circuit can be added to the battery, the control circuit can be very complex, so the power The voltage must be greater than the cell voltage to have sufficient capacity to supply the charge control circuit to the units. Finally the voltage actually added to the cell will never be the nominal voltage of your power supply. Rest assured.
Q:11kw 6-pole motor can be used to adjust the inverter to 1800RPM?
Frequency conversion frequency f to 90Hz can. 1800 = 60x90 / 3,3 that is 3 pole, is 6 pole. Regardless of load.
As the leader in the field of medium Voltage Variable Frequency Drive, we have been focusing on providing the integrated solutions of automatic control and energy-saving technology etc. for customers, and its skill levels and market impact of medium voltage VFD are in the world-leading positions. We have provided products and services across more than twenty countries in six continents around the world, taking up the first market share (China) in the past nine years.

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Location Beijing,China
Year Established 1998
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