Medium Voltage Drive VFD 280KW 6.6KV HIVERT-Y 6.6/031

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Long lifetime


The DC bus capacitors provide an energy store and de-coupling buffer between the supply network and the load
side converter. The high value of the capacitors almost eliminates the voltage ripple and stabilizes the DC bus
voltage, suppressing disturbances caused by fluctuations of the load and supply side harmonics and switching
transients.Traditionally, the capacitors used for the DC bus have been of aluminium electrolytic type as the technology is mature and relatively low cost and also achieves a high energy density.

 

Disadvantages of electrolytic capacitors
However, electrolytic capacitors suffer from some disadvantages:
∙ Limited ability to handle large ripple current.
∙ Limited voltage rating and ability to handle voltage surges. It is necessary to connect capacitors in series and use voltage-sharing resistors, increasing system design complexity and reducing overall reliability.
∙ Limited lifetime.
∙ Unsuitability for long-term storage as spare parts.
∙ Failure modes may result in collateral damage to other components.

 

Advantages of metalized film capacitors
The RMVC 5100 uses metalized film capacitors which have the following advantages, despite having a lower power
density:
∙ Limited ability to handle large ripple current.
∙ Limited voltage rating and ability to handle voltage surges. It is necessary to connect capacitors in series and use
voltage-sharing resistors, increasing system design complexity and reducing overall reliability.
∙ Limited lifetime.
∙ Unsuitability for long-term storage as spare parts.
∙ Failure modes may result in collateral damage to other components.

.Medium Voltage Drive VFD 280KW 6.6KV HIVERT-Y 6.6/031

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Q:ASUS notebook power adapter can be universal? is it?
Yes, see the same parameters as the interface on the line
Q:Notebook plug in the power adapter lights, but can not open the machine
This is a contradictory problem: First, the power adapter lights because the power is good, but does not mean that the computer is good; Second, can not open the machine with the power adapter is lit, it is your computer reasons. Recommendation: Check the computer hardware. Asked: But the battery can be used to start ah answer: Remove the battery plug in the adapter or put the battery installed plug in the adapter, if you can not open the machine, then it is a hardware conflict. The solution to the hardware conflict is that you try another adapter. Asked: the battery removed to die, but as long as there is a battery can answer: it shows that your adapter is bad. Asked: the more magical is plug in the adapter and the battery, the battery will not consume Answer: get you electronic city so that they give you a test. You can say to buy an adapter, and then try, you can use the words to buy, can not use the words and then think of other methods.
Q:Is it possible to use a different laptop's power adapter?
For the power adapter, whether access to equipment, the following aspects of the measurement standards: Interface form The interface plug and socket used must be dimensioned. Voltage size The output voltage of the adapter is the same as the required voltage of the connected device (eg notebook). Inconsistencies may not be able to start or burn the device properly. Current or power The power of the adapter is greater than the maximum power required by the device. Power is not enough, may cause the voltage to drop, the adapter is hot, or burn the adapter. More than the above, the use of more power of the power adapter, while meeting the interface and voltage conditions, it can be replaced.
Q:What is the meaning of the bipolar polarity in the inverter ah There is a +10V signal input is a -10V What is the meaning of ah?
That is to say that the potentiometer at both ends of the line between + 10v and -10v, tap can be given with a potentiometer to control the positive and negative!
Q:ASUS power adapter Acer can use it
2. Is the adapter's output current consistent with the notebook's requirements? (Or a little bit of the current is also not.)
Q:In the official website to buy ThinkPad notebook, to the power adapter?
Hello, generally there will be a power adapter with Kazakhstan, unless there is a special note bare metal
Q:Laptop power adapter bad what is the phenomenon?
If you unplug the power adapter is good, then your adapter has a problem, you are the original adapter, I encountered the imitation of the adapter has this problem,
Q:Is the laptop power adapter AC and DC?
Most laptop power adapters can be used for 100 ~ 240V AC (50 / 60Hz). Basically, most of the notebook computers are external power supply, with a power cord and the host connection, which can reduce the size and weight of the host, only a very small number of models built in the host power.
Q:What is the principle and implementation of the inverter?
AC inverter principle. It is the first AC current will be converted into direct current, and then use the electronic components of the DC switch. AC power. General power of the larger inverter with a thyristor. And set an adjustable frequency device. The frequency in a certain range adjustable . Used to control the number of revolutions of the motor. The number of revolutions can be adjusted within a certain range. The frequency converter is widely used in the speed regulation of AC motor. Frequency control technology is an important development direction of modern power transmission technology, with power electronics Technology development, exchange frequency conversion technology from theory to practice gradually mature. Inverter not only smooth speed, large range, high efficiency, start current is small, smooth operation, and energy saving effect is obvious. Therefore, the exchange frequency control has gradually replaced the traditional traditional slip speed, variable speed control, DC speed control system, more and more widely used in metallurgy, textile, printing and dyeing, smoke machine production lines and buildings, Water supply and other fields. Generally divided into rectifier circuit, flat wave circuit, control circuit, inverter circuit, and so on several major parts.
Q:Who knows how the frequency converter works
3. Control circuit Now the basic converter with 16-bit, 32-bit microcontroller or DSP as the control core, in order to achieve full digital control. The frequency converter is the output voltage and frequency adjustable speed control device. The circuit that provides the control signal is called the main control circuit. The control circuit is composed of the following circuits: "operation circuit" of frequency and voltage, "voltage and current detection circuit" of main circuit, and "speed detection circuit" of motor. The control signal of the operation circuit is sent to the "drive circuit" and the "protection circuit" of the inverter and the motor Inverter to take the control mode, that is, speed control, turn control, PID or other means

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