China Frequency Control Speed/VFD/VSD/VVVF/ Frequency Inverter
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- 1 unit
- Supply Capability:
- 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.
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.
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
- 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: Will the 75KW4 pole motor can be used to increase the speed of the inverter?
- China's power frequency 50hz, and the motor rated frequency match, blindly by increasing the frequency of the inverter output motor speed is not desirable, will affect the motor magnetic circuit, work is not normal.
- Q: Laptop power adapter bad what is the phenomenon?
- Either the power is bad or the machine on the power supply module is bad to repair service
- Q: Will the asynchronous motor pole change the number of speed control can also be combined with the frequency converter
- Of course, because the factors that determine the speed of asynchronous motor power supply voltage, frequency and motor pole pairs, so asynchronous motor speed can be achieved by changing the number of magnetic pole pairs, but this method needs to make a greater motor changes, Trouble, and change the number of poles can only achieve a single speed change;
- Q: What is the characteristic of the variable pole speed method?
- Edit this paragraph speed method First, variable pole alignment speed method This kind of speed control method is to change the stator winding winding way to change the cage motor stator pole pairs to achieve speed control purposes, features are as follows: with hard mechanical properties, good stability; no slip loss, high efficiency; wiring Simple, easy to control, low price; stepless speed regulation, large level difference, can not get smooth speed control; can be used with voltage regulator, electromagnetic slip clutch with the use of high efficiency and smooth speed control characteristics. This method is suitable for production machinery that does not need stepless speed regulation, such as metal cutting machine tools, lifts, lifting equipment, fans, pumps and so on. Second, the frequency control method Frequency conversion is to change the frequency of the motor stator power supply, thereby changing the speed of its synchronous speed control method. Frequency converter system can be divided into AC - DC - AC inverter and AC - AC inverter two categories, most of the current domestic use - cross - frequency converter. Features: high efficiency, no additional loss during the speed control process; wide range of applications, can be used for cage type asynchronous motor; speed range, hard and high precision; technical complexity, high cost, maintenance and repair difficult. This method is suitable for applications requiring high precision and better speed performance. Frequency conversion speed is divided into the following basic frequency and frequency above the speed, the fundamental frequency is constant torque speed control mode, the frequency above the speed is constant power speed mode.
- Q: Why the number of motor poles increased, the inverter capacity will increase
- The power of the three-phase motor is equal to the root number of 3 times the line current and the line voltage of the product again good with the power factor. Can also be 3 times the phase current and phase voltage of the good product and then good to power factor. The frequency converter should match the rated current of the motor, not the power of the motor.
- Q: With the inverter control fan 37Kw4 pole with what model inverter
- Control the fan: select the fan pump with 37KW or 45KW inverter.
- 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: Do you need to rectify before switching?
- There are two ways to convert frequency, that is, cross and cross the intersection, the latter need a direct current, need no rectification, depending on your DC situation.
- 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
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China Frequency Control Speed/VFD/VSD/VVVF/ Frequency Inverter
- Ref Price:
-
- Loading Port:
- Dalian
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 unit
- Supply Capability:
- 10000 unit/month
OKorder Service Pledge
OKorder Financial Service
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