The high reliability of our VFD systems is achieved by multifold innovations including patented technologies of serial communication, pre-charging, automatic recovery, vertical ventilation & heat dispersion, and so on.
Patented communication technology
The communication between the control system and the power cells is in serial. Compared to parallel communication, the reliability of communication can be improved four times with this innovation.
Patented pre-charge technology
The pre-charging function can effectively control the charging speed of the capacitors, and thus charging shock can be prevented. Together with IGBT intelligent driving technology, the innovations can double the lifetime of the capacitors, from 5 years to 10 years for instance. The maintenance cost can be lowered significantly.
Patented automatic recovery technology
With real-time monitoring, the VFD system can identify the causes of power cell bypass, and automatically restarts once it detects the problems are fixed. It ensures equipment to operate continuously and stably when the bus power supply has instantaneous failure.
Patentedventilation and heat dispersion method
Our VFD’s ventilation system is centralized and vertical. It has significant advantage over the distribution type in terms of temperature field control, air flow distribution, and wind speed uniformity. Since the capacitor units are located at the ventilation ducts, it is estimated that the lifetime of capacitor can be doubled, and thus the overall system service time is prolonged with this cooling mechanism.
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:Three sets of batteries (540V) DC power supply U / f inverter.
It is estimated that the battery should be string - and - series connection method, and then rectifier part of the converter (which may also be caused by the switch) is actually a series of diodes in series, positive and negative after the reverse is actually the battery is Negative shorts, resulting in burning, as to burn only one of the group of a few cells, it should be string - and - string and that group, because the parallel to bear it double voltage.
Q:Lenovo laptop power adapter side of the feet which is positive
Very simple, look carefully on the power there is a symbol on the map (relatively small, carefully looking for all the regular power above the standard), as I shown below is the positive external, most of the power is like this , If the sign on the icon is anti, that is connected to the center of the black point is negative, that is negative inside the positive. This figure is also very intuitive.
Q:Can different brands of laptop power adapters be generic?
First look at the specifications, voltage, power, current, are matched after looking at the interface, all the same can be used, or else the two are bad.
Q:How to choose the right inverter?
2, constant torque load
Constant torque load equipment requires low frequency inverter torque, dynamic response speed. Inverter 0HZ vector state, to 150% of the torque, to meet the needs of various conditions.
For example: a dredger owner bucket inverter system, is a constant torque load, dual motor, and the load overload time is long, so the inverter configuration configuration to enlarge the two models of the G-type machine, while the power supply for the device Machine power supply, the inverter must be configured to input AC reactor.
Q:Speed of 3000 r / min three-phase motor how to change its speed
Voltage regulator, variable pole speed, the best inverter speed. The
Q:How do I protect the inverter when the three-phase two-pole motor is running?
Three-phase two-pole motor running inverter protection, should be based on the protection of tips, check the corresponding manual to deal with.
When the inverter protection has a corresponding protection tips (such as over-current, over-voltage, speeding, stall ... ... etc.), the product manual will generally give the corresponding protection tips. According to these measures to check, deal with, you can solve the problem.
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:Please recommend a high performance laptop power adapter?
See what model you notebook ah, according to your power adapter voltage, rated current to match.
Q:The laptop power adapter is burned
You want to say that the power line or the two brands of power adapter? If only refers to the power cord, then you can rest assured that the world's power lines can be used, this line is an international standard, regardless of you and me, TV CD player line
Q:2 pole 0.75 kW motor can increase the speed through the inverter?
2-pole motor speed of about 2900 r / min or so, 4-pole motor speed of about 1400 r / min or so, which are in the case of 50HZ,