4.16kV /6kV Series VFD 3kV /3.3kV Series VFD 6.6kV Series VFD 10kV / 11kV/ 13.8kV Series VFD
Medium Voltage Variable Frequency Drives are designed to be highly reliable with high-performance, yet easy to use.It can satisfy users' need for changing the speed of fans or pumps,as well as improve the productivity. The series are compatible with all types of three-phase medium voltage asynchronous motors. The VFDs which are compatible with medium voltage synchronous motors are in the final stage of development. series of medium voltage VFD manufactured with the new type of IGBT with microprocessor control have the qualities as follows: 1. Voltage resource VFD, direct input of 3,3.3,4.16,6,606 and 10 kV,direct output of3,4.16, 6,6.6 and10 kV,no output transformer necessary. High input power factor, low harmonic current, no power factor corrective capacities and harmonic filters required. 2. Sinusoidal multi-level PWM output waveform, no output filter required, can be directly connected to standard induction motor,no harm to the insulation of the cable or the motor, low harmonics of the motor, reduction of vibration of the shafts or the vanes,with the maximal length of the output cable of 1000m. 3. Friendly human-machine interface. 4. Modular design of the power circuits simplifies maintenance routine. 5.The medium voltage circuits are linked with the controller by the optical fibers,which keep the controller safe and away from the disturbance. 6. The complete fault monitor circuit, accurate fault alarm and protection. 7. Integrated cooling blower 8. The control logic can be conveniently changed with the help of the integrated PLC. 9. Offer both field control and remote control in monitor station, providing convenient controlling options. 10. Support most of the industrial standard protocols (Profibus, Modbus, TCP/IP, etc.) 11. Compatible with industrial standard signal of 0-10V/4-20mA 12. Able to operate at either open loop control or closed loop control status with the integrated PID regulator. 13. Complete system parameter setup function of VFD 14. Easy installation 15. Excellent performance/price ration
Rated output current (A)
Motor power (kW)
Rted input voltage
Input power factor
0.96 with rated load
120% 1 min, 150% immediately
expanded according to requirement
<90% without condensation
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Q:Laptop power adapter is used to do what
Power and charge the notebook. Equivalent to power, mobile phone charger.
Q:Motor nameplate on the standard 2P, I set the number of motor pole in the inverter, is set 2 or 4 pole?
n the motor pole, an Antarctic (S pole), an Arctic (N pole), calculate a pair of poles, the number of pole pairs is how many such "pairs" (S pole + N pole). 2 pole motor --- pole pairs 1 = P = 1,4 pole motor --- pole pairs 2 = P = 2, and so on.
Q:How does the variable frequency motor output torque at very low frequencies?
50hz the following frequency, u constant, current and frequency is proportional to the frequency down the output current is also down, and torque and current is proportional to the natural torque is small
Q:Computer frequency changer to do cd frequency changer how points positive and negative
Two identical capacitors in series, the capacity is half of the original, the two capacitors in parallel after the same capacity doubled.
Q:Is it possible to use a different laptop's power adapter?
See the adapter is suitable for notebook models to use, the following three conditions for reference:
1. The output voltage of the adapter is the same as that of the notebook.
2. Is the adapter's output current consistent with the notebook's requirements? (Or a little bit of the current is also not.)
3. The size of the joint is appropriate. (If the connector is too loose, will be bad, excessive fever.)
For DELL and HP / Compaq and other notebook power adapter, will involve a decoding problem. Please pay attention when the pro to buy.
It is said that the market is also very popular universal adapter, a friend bought a LVSUN brand universal adapter LS-PAB90-BC10, with eight joints. Adapter has a liquid crystal display, you can automatically switch the voltage, very smart, with more than a year, has also been used
Q:What is the meaning of the bipolar polarity in the inverter ah There is a +10V signal input is a -10V What is the meaning of ah?
Bipolar input is positive and negative. Bipolar input is generally used to directly through the external reference or potentiometer to achieve the motor forward and reverse switching, without having to switch all the way to switch the signal (switch).
Q:Short-term short-circuit converter DC link positive and negative will damage the inverter?
the switch signal Is the fan running up after the speed line is low, this can be shorted. Pulse is every turn a circle, send two pulses to the speed line
Q:Can the four motors be tuned to 2900 rpm?
You have to look at what is the load, and look at the motor bearing can not bear 2900 turn, if the line, then under normal circumstances are possible. Only to the speed up to the motor rated speed above, the motor output torque is reduced.
Q:Three motors, if coupled with the governor speed, is it necessary to add the inverter?
Third, the cascade speed: Cascade speed refers to the winding motor rotor loop in the adjustable resistance to change the motor slip, to speed the purpose of the past, the most widely used.
Q:What is the difference between the electronic governor and the frequency converter on the motor speed regulation?
Electronic governor is for single-phase motor, by changing the access winding resistance and capacitance to adjust the motor speed, the speed of the power supply power for the output does not change, so this speed is not an energy Type of speed control methods, such as home for the use of fans and the like.
Inverter speed is the original direct input three-phase asynchronous motor power first access to the inverter, in the inverter through the PWM and other electronic converter technology to rectify the frequency AC, inverter, become a frequency controllable AC In the input to the motor, in the motor running through the V / F control, output torque control, vector control and other control methods to adjust the frequency, change the loop current, to achieve energy-saving operation, especially in the light load energy efficiency is obvious, An energy-saving products that have been widely promoted and applied