Posts Tagged ‘multilevel inverter’

Flying Capacitor multilevel inverters

December 17th, 2013 | 4 Comments | Posted in Electrical distribution
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Here is the last part of Nasir’s tutorial on Inverters. This time he’s focusing about a type of multilevel inverters which is Flying Capacitor multilevel inverters.

As we know that a multilevel inverter is an electrical device that converts a DC power supply into an AC power supply. Multilevel inverter converts number of DC supplies into AC supply. The DC source can come from anywhere like solar energy or wind energy.

A quite well-known topology of multilevel inverter is Flying Capacitor Multilevel Inverter. It is quite similar to diode clamped multilevel inverter. This type of multilevel inverter requires capacitor to be pre-charged.

Flying Capacitor multilevel inverters 1

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Cascaded H-bridge multilevel inverters

December 5th, 2013 | 1 Comment | Posted in Electrical distribution
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In the last article, multilevel inverters topologies have been well discussed. Now that you know them, their design and their applications, let’s see what Nasir has to say about some of the most important ones.

One of the basic and well-known topologies among all multilevel inverters is Cascaded H-Bridge Multilevel Inverter. It can be used for both single and three phase conversion. It uses H-Bridge including switches and diodes.

At least three voltage levels are required for a multilevel inverter. This can be accomplished by a single H-Bridge unit in Cascaded H-Bridge Multilevel Inverter. To keep the discussion snappy and clear I will go with the major points of this topology and also its advantages and disadvantages compared to other topologies.

Features of Cascaded H-Bridge Multilevel Inverter

Cascaded H-bridge multilevel inverters 1

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Multilevel Inverter Topologies

December 3rd, 2013 | 1 Comment | Posted in Electrical distribution
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Check the latest article of Nasir (one of our members) from his tutorial about inverters.

Owing to the recent popularity and immense industrial usage of multilevel inverters, a lot of research is going on in the field of multilevel inverter topologies. All these topologies have various applications along with their inherent limitations.

There are two methods of controlling multilevel inverters:

  • PWM Control (allows variations in output voltage)
  • Line Frequency Control (does not allow variation in output voltage)

Multilevel Inverter Topologies 1

Three of the very basic and might I say the initial topologies are:

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Introduction to Multilevel Inverter

November 26th, 2013 | 1 Comment | Posted in Electrical distribution
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In this part of his tutorial, Nasir, one of the members of the Electrical Engineering Community tells you about Multilevel inverters. Will you find it helpful?

Introduction to Multilevel Inverter 1

An electrical power inverter is basically a circuit that converts a DC signal into an AC signal. First things first… why do we need inverters in the first place? That’s simple because AC signal is more useful in our daily appliances and it travels easily.

Now why multilevel inverters? That’s even simpler…..because it is easier to use multilevel inverters rather than using multiple power lines.

Another million dollar question is what’s the difference between a simple inverter and a multilevel inverter? The answer to this is as follows:

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