Variable Frequency Inverter/VFD for fan and Water Pump

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10000 unit/month

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General Introduction


From the above, different voltage output, the quantity of power units is different, but the working theory is exactly identical. All power units receive the indicator from same central process controller. There is a phase difference in secondary windings of transformer which provide energy for power unit, in this way, most of the harmonics current caused by independent power unit will be eliminated, so the primary winding current is approximately sine wave, the harmonics current flowing into power grid are so few, even under the rated load, the harmonics contents is lower of 3%.

 

The power unit is AC-DC-AC structure, equivalent to a low-voltage power source inverter of 3-phase input single-phase output. The rectifier side is diode three-phase full bridge circuit and the IGBT inverter bridge can be controlled through sine PWM mode to output single-phase AC. All power units are fully identical in structure and electrical performance, very easy for maintenance and replacement.


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 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.

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.

Variable Frequency Inverter/VFD for fan and Water Pump 

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Q:Speed regulation method of three - phase asynchronous motor
This is the two-speed motor 1 will be the UI VI WI connected to the third phase of the remaining joint empty at this time for the four 2 U2 V2 W2 connected to the other three junctions at this time for the two levels This is the angle - there are many binary speed In addition there are three-speed motor in this no longer introduced The number of variable pole pairs can be varied, but the more variable the number of logarithmic materials Like a two-speed motor with a set of windings Three-speed motor has two sets of windings So the current single-board frequency conversion speed up
Q:How to learn the inverter debugging and design parameters
You can find the basic inverter manual, see a few times to try, under normal circumstances, the inverter on the use of manual functions such as research to understand that most of the applications are no problem.
Q:Siemens g120 inverter torque limit what is the meaning
Torque is a strain, the inverter can not actively control the output torque size, only according to the size of the load demand torque, the output of the corresponding torque.
Q:Laptop power adapter repair how much money
Look at your warranty period had no, no contact the seller can be free for a new one. If there is no need to repair the warranty period. Now the maintenance point is too lazy to repair. Suggest you follow your computer brand with a new one Because the maintenance fee to buy a difference can not be much money and the quality is not guaranteed, a power adapter is now dozens of dollars
Q:The parameters of the inverter is 4, 6 motor can be used
The inverter is mainly composed of rectifier (AC variable DC), filter, inverter (DC variable AC), brake unit, drive unit, detection unit micro-processing unit and so on. The inverter will adjust the voltage and frequency of the output power by the breaking of the internal IGBT, according to the actual needs of the motor to provide the required power supply voltage, and then achieve the purpose of energy saving, speed control, in addition, the inverter has a lot of protection , Such as overcurrent, overvoltage, overload protection and so on. With the continuous improvement of industrial automation, the inverter has also been a very wide range of applications.
Q:How to disassemble the notebook power adapter
4, between the shield and the circuit board is also separated by a layer of thick plastic film, and then cut off the knife after the United States, you can see the circuit board "Lushan true"
Q:What is the application of variable frequency speed control?
Frequency control speed ratio is relatively large, in other words, the speed is accurate, smooth speed. Widely used, the basic works can be used
Q:Oil-free vertical vacuum pump why a little negative pressure inverter on the torque limit
Or the star of the three-phase motor to the corner, so that after the rectifier inverter into a 220-volt three-phase AC ...
Q:Laptop computer about electricity no electricity, is the power adapter problem?
To judge this is very simple: 1. The computer is in the battery state to see if it works properly. If it does not work, the battery has a problem 2. Remove the battery from the computer with a power adapter to see if it is working properly. If not, there is a problem with the power adapter 3. If the two states can work that is the computer charge management part of the poor contact and other issues.
Q:What are the differences and links between the soft starters and the frequency converters, and their respective principles and uses?
The frequency changer mainly consists of rectifying (alternating current direct current), filtering, re-rectifying (direct current alternating current), braking unit, driving unit, detecting unit micro-processing unit and so on. Motor asynchronous speed expression bit: N = 60 f (1-s) / p (1) Where n --- the speed of asynchronous motor; f --- the frequency of asynchronous motor; s --- motor slip; p --- motor pole pairs. From the formula (1) we can see that the output speed of the motor is related to the input power frequency, slip rate and the number of pole pairs of the motor. Therefore, the direct speed regulation mode of AC motor mainly has variable speed (adjustment P), rotor Resistance speed control or cascade speed or internal feedback motor (adjust s) and frequency control (adjust f) and so on. And we now use the most widely used is the frequency control, from the speed n is proportional to the frequency f, as long as the change in frequency f can change the motor speed, when the frequency f in the range of 0 ~ 50Hz, the motor speed adjustment range is very width. The inverter is to change the motor power frequency to achieve speed adjustment, is an ideal high efficiency, high performance speed control means.

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