Help about Martrix Converter

I'm not sure... but, I'll wager that... the purpose of the project is so that you LEARN how to design such a device.

What you will learn by using someone else's circuit diagram is... how to surf and copy and paste.

So tell me does the "MSc" stand for "Master of Surfing and Copying" or "Master of Science"? If you want to be good in your chosen field of expertise, a little sweat may be required.

This forum is full of well rounded individuals with many years of trade knowledge who would have enjoyed helping you if only you had of come to this forum asking about switching theory and the like.

Perhaps I am over reacting, but given the number of questions asked by people, of late, who appear to be "taking the easy" road... I fear for the future of our industry.

Hello

i really want to do it by myself but to get start with it....i really need some sort of help , i mean is there any book or so from which i can get help about this ????

Ok... then lets start.

What is the converter supposed to convert? You mentioned a voltage and a current value. You would need both "input" and "output" parameters before you can design something. As well, as asked below, what does the term "matrix" imply?

I think the term "matrix" may refer to a pretty clever, "matirx transformer" design I read about and attempted to understand around 20 years ago. The significance of it was the substantial reduction in iron and copper compared to conventional transformer design for the same power levels. If that's not what "matrix" means, I don't know what it is.

If you don't know how you have to do one of two things figure out how or read how someone else have done.

If you learn from someone else and (hopefully) make it better in some points then you have a headstart.

Problem with in the industri is as much people who have to invent the wheel over and over again.

Yours sincerly "one how has not all the answers but can find them out"

Newton 'Stood on the Shoulders of giants.', go ahead, review the state of the art. Don't plagiarize but review the field. I retired when I told my Prof. of my 25 year experience in solving the failures his project was having. He replied "I will make my own mistakes". I left him with 20% downtime and some 5 hours of technician wasted each week. I know you will learn the balance, but your project's references will be judged too. What is a matrix converter anyway, logic, buffer-isolators and switches, good luck.

Begin by reviewing your power electronics courses to make sure that you understand the basics. Then use the information provided by semiconductor manufacturers. They often have application notes for their products.

These days, a power electronics engineer has many choices.

1- You can build your own gate drivers and switches assemblies.

2- Buy complete gate driver modules with isolated DC-DC converters and use them on your assembly.

3- Buy the whole thing from a manufacturer and connect it to your PWM generator.

#1 is rarely done as the #2 is more efficient. Eupec and others have excellent gate driver modules that will make you save months of development with better results that you would have gotten for $50 to $100. If your topology is a standard H bridge, solution #3 will make you save even more time. Money is usually a limiting factor for students but don't forget that time and success are also important. You don't want to be bugged down with a switching problem when you are trying to develop a new control strategy. You might be able to find a sponsor for a complete assembly if you ask the right companies (and find a future employer at the same time).

The path you will choose depends on the objective. If you want to practice basic power electronics, use #1. If you want to work on the application of a special topology use #2. If you are a software guy with a little of hardware skills, use #3.

As for names of manufacturers, try Eupec, International rectifiers, Powerex, SGS Thomson? or whoever is locally available in your corner of the world.

Finally, 380VAC, 600VDC are dangerous voltages. Take the time to make protective covers around your project. Use proper grounding techniques...

Good luck and work safely.

how would second option will be helpfull in AC-AC single phase Matrix Converter Sir ?

I do not understand your question, add more details. Here is a possible answer. If you need to build a converter, you can use pre-designed gate drivers to drive your "special" semiconductor configuration. This way you spend your time on what is original in your circuit instead of designing a fairly standard gate driver circuit.

As far a matrix converter is concerned, you need a special configuration for your switches (most likely IGBTs). There are good research papers about them (IEEE publications on power electronics). If you are doing a Master degree, you should have access to those and will have to revise the state of the art for your thesis. Start by doing a good review. You seem very "green" in power electronics. This review should help you learn some of it and decide on the circuit configuration.

Don't be mislead by the catch word of "matrix converter". It is simply one more circuit topology with its strength and weaknesses. It is not used in the industry for the moment because the minimal filtering causes problems with inter-harmonics contamination in the main supply and the load. These can be worst than normal harmonics as they can activate all kind of resonances in plant passive filters. But don't let this discourage you. We need people to work on this problem and hopefully solve it. If the matrix converter's problems are not solved, it will become another academic curiosity that didn't fly...

Good luck.

Sir in my project i just want to analyse the switching transients and switching problems of matrix converter.

as we know switching of igbt's at correct time is needed for matrix converter to get desired output.

so how can i do this stuff ?

A lot of work has been done in the last twenty years or so on improving the reliability of high-power switching circuits. Many of the "driver" circuits for IGBT's or MOSFET's have either built-in hysteresis, delays, or other means of preventing short circuits between power supply rails, and IGBT's and MOSFET's (as well as other technologies) now typically have built-in, fast-recovery, free-wheeling diodes.

Designing a switching converter is another thing altogether, whether you use "matrix" transformers or not. You seem to be concerned mostly about the switching circuit, and a little research will yield more enlightenment than you might imagine.

Use the internet for more than asking questions -- there's tons of information on the subject available.

I think that your thesis director is (should be) in a better position than me to direct you about your research. Did you ask him these questions? As a student, you are paying the university for his services. If he cannot answer these questions, you should find another director or university.

If I were you, I would look at what we are trying to achieve. The options can always be grouped in build or buy. If you are only interested in the behavior of the matrix converter, you could find another group that has made one and either borrow, rent, or buy their prototype from them. There might be implementation problems associated with their prototype but it should be much faster than building your own. You could even consider working with that other group as you would find more knowhow and equipment than what you seem to have found at your present university.

What you are trying to do requires specialized knowledges and measurement tools not found in most electronics laboratories. You will need a good recording oscilloscope with four channels if possible, high voltage differential voltage probes and clamp on current probes to take measurements safely. If somebody tels you to "float" the scope, don't do it. It is dangerous and you are likely to fry something or somebody. Work safely with peoples that know what they are doing and you will learn something.

Good luck.

Check out the IEEE - Industrial Electronics.

There have been many recent articles on matrix converters.

The IEEE press also has handbooks like "Power Semiconductor Applications".

Once you decide on the devices you will determine the watt loss and that determines heat sink requirements. The selection here is another art in itself.

You may also want to consider the overall topolgy since you will have inductive components created by your circuit layout.

It would be instructive to investigate the packaging of existng VFD drives.

The firing circuits are partly determined by your power device. The pattern for firing is a "state of the art" research progect.

There is much current research in this area. Dig into it and see if you can add something new.