3/3.3kV/6/6.6kV/10/11kV Compact AC VFD Drive

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 Working Principle

WLD-HVF series medium voltage inverter adopts Power Units in series and overlapping technology to obtain MV directly by means of overlap wave. Low voltage power unit is an actually improved motor variable frequency inverter, which takes full advantage of mature technology. WLD-HVF belongs to High-high voltage source inverter, the customer can connect high voltage (3/6/10KV) directly to WLD-HVF, then WLD-HVF output high voltage (3/6/10KV) correspondingly. WLD-HVF consists of phase-shifting transformer, power unit cabinet and controller, for example:

6KV Series: Consisting of 15 AC power units with 690V. Every 5 power units are connected in series to form one phase (phase voltage 3450V), 3-phase Y-type connection, so the Line voltage can reach to 6KV.


Energy Saving Fields

  • 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, grinding machine 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, belt conveyor, slurry pump etc
    Others: Loads such as fan, pump and compressor in pharmaceutical, paper making and wind tunnel test

 

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.

3/3.3kV/6/6.6kV/10/11kV Compact AC VFD Drive 

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Q:90KW inverter start 90KW, 4-pole motor and 6-pole motor j What is the difference? The inverter can be used for it?
Two motors can use the same frequency converter, but the motor nameplate data through the parameters to adjust the input when the inverter should pay attention to some
Q:What is the frequency of `30 points
Frequency is to change the frequency ah, see what you are variable frequency equipment.
Q:Three-phase motor, quadrupole asynchronous motor to 15rpm, the inverter output how many volt voltage? The 4 V
The voltage does not change, but the frequency changes, about 0.5 Hz
Q:Variable frequency pump pressure in the very low flow instability, why?
From the performance curve, the flow becomes smaller, the combination of pressure and frequency adjustment flow will only stabilize the flow at a small value, the pressure will be reduced, because the work point will move down.
Q:I have a 11KW-4 pole inverter, now with the 4KW-4 pole motor, what impact?
11KW the following can be brought, the inverter rectifier module may be broken,
Q:380V motor addition to the inverter, but also how to change its speed?
1. Change the number of pole pairs of the motor. (Multi-pole motor use) 2. Use the frequency converter to change the frequency
Q:Is the laptop power adapter high temperature normal? Is there anything else?
In fact, I am also facing such a problem, but I have solved: First: you put the battery together, together with the power adapter, 1 hour after you will feel very hot, it is estimated that you say this. Although your battery is full of electricity. Second: the battery removed, and then use the power adapter, 1 hour after you will feel the general heat, much better than the first case. If you follow the above operation is what I said the same situation, it shows that your power adapter is no problem, because I specifically looking for professional after-sales such a problem, and later also detected the battery, are normal, so if you want is not very Hot, you can remove the battery.
Q:22kw.2 pole fan can use Fuji inverter?
Definitely yes. 2-pole motor and four-pole motor difference is: the current is different, the speed is different, the torque is not the same,
Q:The parameters of the inverter is 4, 6 motor can be used
Variable-frequency (VFD) is the application of frequency conversion technology and microelectronics technology, by changing the motor operating frequency mode to control the AC motor power control equipment.
Q:Why G120 inverter to be equipped with 4-pole motor?
I add point with the premise of the inverter is to understand the mechanical load characteristics (or process, etc.), can the parameters set.

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