Brodi W. Perfecting the induction motors for the driving pipe tongs at the oil bore holes at the oil bore holes

The object are is the process of improvement of asynchronous engines of low power, increase of their reliability and improvement of their characteristics in the given limited overall dimensions of the machine. The purpose of researches - improvement of asynchronous engines explosion-proof execution for increase in the given limited overall dimensions of the machine of capacity, efficiency rotating moments, reliability in comparison with serial. The researches were carried out(spent) with use of methods of mathematical modelling, theory of probability, techniques of designing, present methods of tests. The new way of increase of the starting moments of engines of low power from the starting moments of engines of low power with сast copper by rotors is developed by creation of a starting layer in cores. The technique of designing of asynchronous engines and appendix to mathematical model of electromagnetic processes of the account and choice of optimum size of a starting layer in а anisotropy cores of a cast copper crate of a rotor is developed. The technical opportunity of reception сast copper of rotors with a starting layer in receptions сast copper of rotors with a starting layer in each core is confirmed. The made experimental batch of engines in quantity(amount) 15 pieces has passed operational tests, which results positive. The results of researches can be introduced at the electromachine-building enterprises and research institutes at designing special kinds of electric drives.