Directly driving the general medium voltage synchronous or asynchronous motor and the temperature of the motor will not be increased.
No need of motor derating operation
No dv/dt damage to insulation of motor and cable
No torque ripple induced by harmonics, and the service life of motors and mechanism devices can be extended
No cable length limited when voltage drop is in the allowable range.
Besides the above advantages, medium voltage variable frequency drive has the following functions :
Protection of overload, overheat, over-current, open-phase, grounding, over-voltage, negative sequence.
Current limited function
Interlock protection of control power supply
Two sets of control power hot standby for redundancy
Power cell by-pass function
Control cabinet automatic bypass function
Cabinet door opening alarm function
Synchronizing switch function between variable frequency and power frequency (optional)
Soft start of motors, no impact to mechanical equipment and network
Voltage source High-high variable frequency drive, it can realize No-step speed regulation, which makes the typical motors into intelligent motors.
Medium voltage variable frequency drive has the following features:
High quality power input: By phase shifting of the secondary winding and multi-pulse diode rectifier, isolated powers can be acquired and supplied for power cells. (18 pulses for 3/3.3kV, 30/36 pulses for 6/6.6kV, 48/54 pulses for 10/11kV) By using the technique of multi-pulse rectifier, the harmonic current could be eliminated greatly.
Power cell communicate with controller through optic-fiber, completely electric isolated
Inner set PID regulator, can realize running in closed-loop
Multiple communication methods with host computer, isolated RS485 interface, standard MODBUS RTU, communication protocol, PROFIBUS DP (optional), industrial Ethernet communication protocol (optional)
Accurately fault records, can inquiry information and locate fault
Compact construction, reasonable layout (can do customer-design)
Very good protective design to dust, ferrum pulveratum, acid mist, moisture etc.
Bypass cabinethas a function of "five-protection", meanwhile, it has a pressure relief channel to ensure the safety of operators.
Modularized design of power units, interchangeable and easy to produce and repair.
Rated output current (A)
Motor power (kW)
Rted input voltage
Input power factor
0.96 with rated load
120% 1 min, 150% immediately
expanded according to requirement
<90% without condensation
Send a message to us:
Q:Speed regulation method of three - phase asynchronous motor
Change the number of pole pairs can be adjusted, in the way around the stator coil through the tap method can achieve two-speed. With the popularity of the inverter, three-phase asynchronous motor speed mostly with the inverter.
Q:With the inverter control fan 37Kw4 pole with what model inverter
Universal or light-load type, the brand is not limited.
Q:Asus notebook power adapter how to open
Hi respectful ASUS users
The power adapter can not be disassembled, and if your machine's power adapter is faulty, you can go to the local service center for testing.
Q:How can a variable speed multi - speed three - phase asynchronous motor be controlled by a frequency converter?
Although the waste, but can be used, we use the frequency band with two-speed motor when the output is connected to the fast three terminals, you can refer to the next
Q:The notebook power adapter flashes
1: Check the socket with a multimeter is normal, the supply voltage is 220V. If the utility voltage is not normal, it is recommended to replace the use of environmental testing.
2: Check with the multimeter whether the output voltage and current of the power adapter match the label. If the gap is very large, and the mains voltage is normal, you can determine the power adapter failure, need to replace the laptop power adapter.
3: If the above check is normal, remove the laptop battery, do not external adapter. Press and hold the notebook power button 5 seconds to repeat 3 times. After releasing the notebook residual charge, insert the power adapter separately, power on the test.
4: If the fault persists, check the notebook's power connector, whether the exception. Such as loose or the appearance of damage and so on.
5: the above checks are normal, basically can be a preliminary judgment is the notebook motherboard failure. Recommended repair service station.
Q:Old printing machine transformation, 37KW6 polar frequency motor with brake, inverter 55KW, now found running,
The frequency is too low or the brake gap is small
Q:Is the laptop power adapter AC and DC?
Notebook power adapter is not AC and DC.
Power adapter is a small portable electronic equipment and electrical and electronic power supply conversion equipment, generally by the shell, power transformers and rectifier circuit, the working power for the exchange (China AC standard AC 220V), according to its output Types can be divided into AC (AC) output type and DC (DC) output type. General notebook power adapter are DC output, is the exchange of DC conversion equipment.
Q:Oil-free vertical vacuum pump why a little negative pressure inverter on the torque limit
and then use the inverter into three-phase AC, 380 volts almost, Can only use the transformer rose to 380 volts.
Q:Fuji inverter motor set the number of poles will not have any effect?
The number of poles is not the same as the speed is not the same mistake machine can not work or motor coil burned
Q:Is it possible to use a different laptop's power adapter?
See the adapter is suitable for notebook models to use, the following three conditions for reference:
1. The output voltage of the adapter is the same as that of the notebook.
2. Is the adapter's output current consistent with the notebook's requirements? (Or a little bit of the current is also not.)
3. The size of the joint is appropriate. (If the connector is too loose, will be bad, excessive fever.)
For DELL and HP / Compaq and other notebook power adapter, will involve a decoding problem. Please pay attention when the pro to buy.
It is said that the market is also very popular universal adapter, a friend bought a LVSUN brand universal adapter LS-PAB90-BC10, with eight joints. Adapter has a liquid crystal display, you can automatically switch the voltage, very smart, with more than a year, has also been used