CE Approved Energy-saving China VFD Manufacturers

CE Approved Energy-saving China VFD Manufacturers

Ref Price:

Loading Port:: Dalian

Payment Terms:: TT OR LC

Min Order Qty:: 1 unit

Supply Capability:: 10000 unit/month

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

You Might Also Like

Power Inverte 2000 Watt

AC Motor Drive

MV Voltage 3KV 6KV 10KV Frequency Inverter

High Voltage 11KV Variable Frequency Drive

Variable Frequency Drive 3.3KV 630KW VFD

High Voltage Frequency Drive 6.6KV 450KW VFD

MV VFD with Charger and Remote Digital Display VFD/VSD AC Drive

3KW Frequency and Voltage Stabilizer Converter/Inverter AC50-11030 Single-Phase

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.

Q: The inverter control power is also the same, the pole is not the same as the motor 6 or 4 pole can be used?: Can be used, but is being used in the motor replacement, you need to change the frequency conversion.

Q: Ordinary 4-pole motor Under the control of the inverter, the higher the speed, the higher the power or the slower the power: P = UI, that is, power = voltage × current. That is only the voltage of the motor will be faster, so the higher the speed the greater the power

Q: If it is 8-pole variable frequency motor, enter the motor nameplate parameters in the inverter input for the 4 pole can?: Motor brand above all, the general number of wrong is the inverter shows the speed is not right, for the speed control requirements are not high places will not be a problem, you can use

Q: I have a 11KW-4 pole inverter, now with the 4KW-4 pole motor, what impact?: that is, the load is very heavy; caused by over-current burning inverter

Q: ABB frequency converter and the difference between domestic frequency converter: The objective lens is equivalent to the lens of the projector, the object is inverted through the objective lens, magnified real image. Eyepiece is equivalent to the ordinary magnifying glass, the real image through the eyepiece into a positive, magnified virtual image.

Q: On the notebook power adapter output current and voltage issues: This current is the maximum current value of the adapter output, Voltage matching, of course, can be charged. It is recommended to select an adapter with an output current value that is slightly larger than the original.

Q: What is the characteristic of the variable pole speed method?: Three-phase asynchronous motor speed formula: n = 60f / p (1-s) From the above equation can be seen, change the power supply frequency f, the motor pole p and slip rate s can achieve the purpose of changing the speed. From the nature of the speed point of view, different speed control mode is nothing more than to change the AC motor synchronous speed or do not change the synchronous turn two. In the production machinery is widely used does not change the synchronous speed of the speed control method There are winding motor rotor resistance, chopping speed, cascade speed and the application of electromagnetic slip clutch, hydraulic coupling, oil film clutch, etc. Speed ??control. Change the synchronous speed of the stator to change the number of pole pairs of multi-speed motor, change the stator voltage, the frequency of the frequency control can not change the motor speed and so on. From the energy point of view of the speed control point of view, there are two methods of efficient speed control and inefficient speed control: high speed control when the slip rate is constant, so no slip loss, such as multi-speed motor, frequency control As well as the speed loss can be recovered speed control methods (such as cascade speed, etc.). There are slip loss of the speed control method is a low efficiency, such as the rotor string resistance control method, the energy loss in the rotor circuit; electromagnetic clutch speed control method, the energy loss in the clutch coil; hydraulic coupling speed , Energy loss in the oil of the hydraulic coupling. In general, the slip loss increases with the speed range, if the speed range is not large, the energy loss is very small.

Q: Can the HP laptop's power adapter be universal?: Power supply low-voltage plug to the same, the voltage to the same, the current is greater than or equal to can be used

Q: Old printing machine transformation, 37KW6 polar frequency motor with brake, inverter 55KW, now found running,: May be mechanical part of the card, try idling motor.