CE Approved Energy-saving China VFD Manufacturers

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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.

     

Technical Features 

  • Voltage source High-high frequency inverter, it can realize No-step speed regulation, which makes the typical motors into intelligent motors.

  • Low harmonics input and high power factor, the typical value for power factor is 0.95 through whole speed regulation, even more higher, no need for power factor compensation.

  • WLD-HVF output few harmonics, the motor does not generate extra heat and noise.

  • Modularized design of power units, interchangeable and easy to produce and repair, the equipment can find any fault exactly based on advanced diagnostic procedures in MPU.

  • The inverter still can operate even the faults for part of power units exists, if there are faults happen for inverter, the system can switch to power frequency through bypass function.

  • Applicable to all kinds of power grid at home and abroad and suitable for typical high voltage motor.

  • Colorful touch screen, easy to operate and maintenance.

  • Able to realize remote control, DCS operation and communications with Host, and support all kinds of communications interfaces such as CAN, Profibus, Modbus, RS232, RS485 etc.

  • Applied latest components, master control chip adopted TI’s DSP F28335 and ALTERA’s FPGA of EP3C to realize powerful processing capacity; Sampling adopted AD’s AD7606 with 16 bit to ensure control accuracy of the system.

  • The switchgear can satisfy safety requirements, and the pressure-relief channel of high voltage switch can ensure safe use of operators. 

  • CE Approved Energy-saving  China VFD Manufacturers 

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Q:Inverter signal line analog 4-20mA connection positive and negative can be reversed?
Inverter signal line analog 4-20mA connection when the positive and negative is not reversed. Inverter input analog signal is generally 4-20mA, 0-20mA, 0-5V, 0-10V and so on.
Q:Variable frequency conversion frequency difference characteristics based on,
Frequency conversion is better, you can smoothly change the synchronous speed. Change the difference is relatively poor, also known as "energy consumption slip" speed. Synchronous speed unchanged, the slip rate has changed, so the speed changed.
Q:Laptop power adapter is used to do what
Power and charge the notebook. Equivalent to power, mobile phone charger.
Q:Three-phase motor, quadrupole asynchronous motor to 15rpm, the inverter output how many volt voltage? The 4 V
4 volts too little, at least tens of volts
Q:How to choose a Siemens inverter for a 5.5KW three-phase motor (2 pole)?
Power, voltage, frequency, and you can use torque sensors to measure torque
Q:Quartet of the TA, TC terminals have positive and negative?
The TC terminal has no positive and negative poles, which are passive programmable relays
Q:Huichuan frequency converter drag a 4-kilowatt four-pole motor to change the six pole can?
Change 6 will only be slower, the fan is no longer role. The frequency converter has a power parameter, as long as the motor is less than or equal to this power can be.
Q:Is the number of Amps of the notebook power adapter higher than the original number of security on the computer?
There is no power adapter is not the number of clocks that the current output of the current frequency is the number of security in the case of the maximum number of output support the specific output current is the number of security is based on the current power consumption of the computer But please note that the power adapter output voltage must be consistent with the original agreement is now generally 20V
Q:Why G120 inverter to be equipped with 4-pole motor?
Not necessarily must be equipped with four-pole motor, 2 pole, 6 pole, 8 pole, 12 pole can be used. As long as there is no problem with attention to current matching. Because the amount of 4-pole motor is the largest, all the frequency converter, are based on 4-pole motor for the control model design.
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.

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