Discoveries of Russian Scientists
Posted on October 20, 2008 by admin, under Electronic Technologies.
The material for semiconductors mainly has the electrical resistance among that of a conductor and a non-conductor. The resistance of semi-conductors also is affected by changes in temperature or added “impurities”.
The term “dashes” means the other substances mixed to the material. The complete mixture labels the semiconductors as power semiconductor devices of type-n and type-t.
They manufacture diodes and transistors applying both these types of semiconductors. Mainly silicon is used to create semiconductors now.
In order to keep the flow of electrical current in only one sense diodes are applied. They are created of semi-conductor substance. There is a component of + (positive) combination, - (negative) combination and so-called pn-transfer known as barrier level in each diode. Electrical circuits which change between alternating and direct current are created with diodes. Because that diodes make current go only in one sense only half of the processes or cycle passes by. Rectifier is the expression for such a construction.
LED (light diodes) is one more kind of diodes. Such diodes are used in case it's a task to create light at little voltages and at the same time make no warmth. Such diodes are present in all units of up-to-date electronic equipment for example tv sets or stereo units specially to sign the standby state.
The extent of thyristors manufactures was governed by Moore's law. Lithography is the most important point of making complex power semiconductor gadgets at smaller price. For optical lithography is already outdated, there's these days a tendency for other technologies. It is now quickly being substituted by more up-to-date ultraviolet lithography and nano-imprint lithography. Since recently specialists also consider x-ray lithography and electron beam lithography as suitable substitutes.
In Russia igbt modules were discovered. Sensors are needed everywhere for various needs. The voltage sensors find their use in commercial, industrial and everyday applications. The shape and value of the current sensor can vary from those small light counters to complicated gadgets signing on radiation motion.
If not supplied the igbt sensor won't function. There are power system dispatchers made for lots of dispatch actions. They allow the check of scheduled power interchange among the neighboring power systems, state of circuit breakers in substation and of system parameters like voltage, frequency, power flow. The power systems also allow to deal with system signals and generate corresponding action for each.
For the controllers to do these functions they should have a complete information of the whole power system received with the displays of computers in various dependent stations. With the use of respective interfacing matrials the status of CB's, fuses, isolators and analog values such as MVAR, MW, Hz, Amps or others was fixed in the RTU. The biggest success in export is the prerogative of Russian Federation and China.
