Medium Voltage Drive VFD 440KW 3.3 KV HIVERT-Y 3.3/096

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Medium Voltage Drive VFD 440KW 3.3 KV HIVERT-Y 3.3/096

Perfect Power Output Section

The HIVERT general MV VFD adopts the power cells connected in series and voltage overlapping method (i.e. Power cells multi-level cascade technology), it can output the perfect PWM sinusoidal waveform (see Figure 2 and Figure 3). It has the following advantages:

1. No need for the additional output filter

2. Directly driving general synchronous or asynchronous motor

3. No de-rating operation on the motor

4. No dV/dt stress on the insulation of motor and cables

5. No torque ripple, extending service life of motors and mechanism

6. No cable length restriction within the acceptable voltage drop.

 

The general MV VFD has the following protection functions and features:

The RMVC 5100 provides speed and/or torque control for Solution for a wide range of industries
motor-driven applications in the medium and high power
range from 200kW to 14 MW at motor voltages from 3.0kV
to 13.8 kV.
It is available with air cooling in the lower power range and
with optional water cooling in the medium to high power
range. RMVC 5100 drives are also available mounted
within a customised container, with self-contained sealed
cooling systems, providing the highest IP class ratings for
hostile environments as well as providing greater
convenience and ease of installation and commissioning.

Medium Voltage Drive VFD 440KW 3.3 KV HIVERT-Y 3.3/096

 

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Q:3.7KW inverter with 2.2KW 6-pole motor running to see the inverter shows the current is more than 4A, with the amount of clamp to 2.8A
Two questions: 1, the inverter output waveform is not a standard sine wave, with the ordinary calorimeter measured value is completely not allowed. The output current of the inverter is the same.
Q:Can the inverter be used to control the speed of the DC motor?
For the brush commutation DC motor, the speed of the output torque in a certain circumstances and the input voltage related. For this type of motor, use the inverter to control the output of the rectifier device that supplies power to the motor, which can control the speed. For the brushless DC motor, the controller is in accordance with a certain law to change the form of stator winding power supply to produce a rotating magnetic field to drive the rotor rotation. That is, the DC motor controller outside the part of the AC motor and the structure and the principle has not much difference (see below. For such motors, with the inverter to replace the controller, and control the same as the AC motor Control the speed.
Q:Fuji inverter motor set the number of poles will not have any effect?
The number of motor poles corresponds to the speed of the motor, the number of poles is not set when the speed of the control error, in the high speed requirements of the transmission is not allowed.
Q:What is the working principle of high voltage electrodes and frequency converters?
High voltage inverter from high - low - high; low - high; high - high points. The following are the same as the " High-low-high-mode high-voltage inverter is the high-voltage power transformer with a step-down, with low-voltage inverter control, and then step up the transformer voltage to the voltage we use, the supply of high-voltage motor.
Q:2 pole 0.75 kW motor can increase the speed through the inverter?
if the 4-pole motor to rise to 2-pole motor frequency, The frequency of the motor rises to about 100 Hz, which is easy to implement for the frequency converter.
Q:Inverter alarm a043, how is it
Check processing: Check if the cable is disconnected. Check the tachometer to shield the ground. The shield is not only on the motor side, but also on the inverter side The cable of the pulse encoder should not be disconnected. The pulse encoder cable can not be laid together with the power loop cable. Use only the recommended pulse encoder.
Q:90KW inverter start 90KW, 4-pole motor and 6-pole motor j What is the difference? The inverter can be used for it?
The number of poles of the motor and the inverter is not very different, the difference is the motor speed is different
Q:The laptop power adapter is burned
Upstairs that are almost, I said two points: First, the landlord said the problem I really met, you can still use the power adapter, nothing, little effect, nor is the machine's problem, but still suggest that you have time to hold your machine to the computer shop test under. Second, the battery you do not use the first, directly with the power adapter, as you said, so as not to two conflicts, your battery broke. On the power adapter, if you want to buy, you directly search ADP-90SB BB, for the best is the best.
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:Three motors, if coupled with the governor speed, is it necessary to add the inverter?
First, the frequency control: the use of frequency converter to change the frequency of the motor stator power supply, thus changing its synchronous speed control method for all motors, which is the most advanced, the most widely used speed control method.

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