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:Is the laptop power adapter AC and DC?
In the power adapter has a nameplate, marked above the power, input and output voltage and current and other indicators, with particular attention to the input voltage range, if the nameplate indicates that the input voltage is AC 110V, then in China's 220V mains voltage Plug it will burn.
Q:What is the principle and implementation of the inverter?
AC inverter principle.
It is the first AC current will be converted into direct current, and then use the electronic components of the DC switch. AC power. General power of the larger inverter with a thyristor. And set an adjustable frequency device. The frequency in a certain range adjustable . Used to control the number of revolutions of the motor. The number of revolutions can be adjusted within a certain range. The frequency converter is widely used in the speed regulation of AC motor. Frequency control technology is an important development direction of modern power transmission technology, with power electronics Technology development, exchange frequency conversion technology from theory to practice gradually mature. Inverter not only smooth speed, large range, high efficiency, start current is small, smooth operation, and energy saving effect is obvious. Therefore, the exchange frequency control has gradually replaced the traditional traditional slip speed, variable speed control, DC speed control system, more and more widely used in metallurgy, textile, printing and dyeing, smoke machine production lines and buildings, Water supply and other fields. Generally divided into rectifier circuit, flat wave circuit, control circuit, inverter circuit, and so on several major parts.
Q:Laptop power adapter is broken, which brand is better domestic
I suggest to buy a compatible adapter on it, because My HP is the power adapter is broken, I spent more than 20 yuan to buy a city, the normal use of more than a year did not find the problem.
Q:What is the output voltage of the laptop power adapter?
16V to 20V, different brands may be different, 19V, 20V more.
A: The inverter output 4 ~ 20mA (0 ~ 20mA), the analog signal can be directly connected to the measuring instrument, the daily design, installation, application are so, as long as the selection is correct, there will be no problem.
Q:Can the laptop 1.3a power adapter be used on a 1.5a device?
No, use a power adapter that is equal to or slightly larger than 1.5a.
Q:Can the laptop power adapter be generic?
Not necessarily, the laptop power adapter has two interfaces for input and output.
1. Input interface is connected to the power outlet, generally divided into two holes and three holes, as well as round mouth and flat mouth of the points;
2. Output interface is connected to the computer side, size, length, diameter, diameter, the pin may have differences, common are: diameter 2.5MM, ordinary mouth, mainstream interface; OD 1.7MM, small mouth; MM, big mouth with a needle, round mouth with a needle and so on.
3. Different voltage, different brands of laptop power adapter voltage is not the same
4. Current is different, different brands of notebook computer power adapter current is not the same
In summary, the laptop power adapter between the different types, basically not common
Q:Laptop power adapter output voltage is not the same as the current? What's the effect?
so this replacement is generally feasible in the general use , But the remaining power supply power margin is very small, once your books took a lot of peripherals, such as two usb hard drive, and then cpu full speed operation, and then a base, the above to drive a full speed to read the disk, plus While charging the battery, it is estimated that the danger, and at any time to touch your power is not already already boiled eggs. 72w more than the 56w adapter 16w is to cope with this situation. So it is best not to use a small current instead of high current power supply
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:400w 6-pole motor should be equipped with much of the inverter?
0.75KW just fine, neither waste the inverter resources, but also to meet the occasional overload. And 0.75KW inverter is the standard model.