Rewind of electric motors and vibrators

The industrial electric motor has passed a difficult way from a useless toy to the modern designs which are let out in a mass production in the development. Common industrial engines in wide scales it has begun to be used only from 70th years of the 19th century. The first industrial electric motors were, naturally, direct current motors. Along with developments of the first industrial electric motors attempts of designing of direct current generators have begun. This long and difficult process can be broken into three main stages conditionally.

The first half of the 19th century is characterized by creation of the physical devices showing continuous transformation of electrical energy to mechanical. In particular, investigating interaction of conductors with current and magnets, the famous scientist Faraday in 1821 has established that the electric current passing on the conductor can force this conductor to make rotation around a magnet or to cause rotation of a magnet around the conductor. Thus, practical experiences have visually proved a possibility of creation of an electric motor. The American physicist J. Henry in 1831 has made attempt to design the device in which the attraction heteronymic and pushing away of the like magnetic poles for receiving the continuous movement was carried out. This peculiar electric motor had very small capacity and actually was not of special practical value.

The second stage in development of industrial engines falls on the middle of the 19th century and is characterized by dominance of designs with rotational motion of the salient-pole armature. In 1834 the St. Petersburg academician B. S. Jacobi has constructed and has described the first engine which acted on the principle of an attraction and pushing away between electromagnets and having undoubted practical application. Jacobi's electric motor could lift a load weighing 10 — 12 pounds (about 4 — 5 kg) on height of 1 foot (about 30 cm) a second, that is its power made about 16 W. News of B. S. Jacobi's invention has extended over all countries soon. New common industrial engines of a different design began to be used gradually in normal life. In particular, in printing houses there were large printing machines which have replaced muscle labor.

At last, in the second half of the 19th century designs of engines with the ring non-salient-pole armature and almost constant torque have been developed. Further researches have allowed to increase not only the power of the industrial electric motor, but also have shown a possibility of the address of the engine to the direct current generator. Thus, as a result of works of a number of scientists and inventors there was an electric motor which has soon begun to be applied widely in equipment and everyday life of the person.

The Professional Electro Repair company carries out sale and repair of engines. Always available big range of qualitative products:

• asynchronous
• crane
• lift electric motors of a foreign and domestic production
• electric motors of a direct current
• multispeed electric motors and any electric motors of urban transport.
  
  And also:
  We carry out repair of electric motors of any complexity. On all types of works on repair of electric motors the guarantee is provided.
  
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