Zakharchuk I. Improving the efficiency of asynchronous motor-fan for diesel locomotives by screening short closing rings in the rotor winding

Object - the creation of an asynchronous motor-fan for more economical to operate the cooling system of diesel locomotive. Goal - improving the efficiency of asynchronous motor-fan for diesel by shielding rings shorted rotor windings to control speed by varying the voltage on the stator winding. This reduces the cost of power to the cooling of diesel locomotives in operation. Methods - a theoretical study of electromagnetic processes in an asynchronous motor-fan based on the theory of differential equations, numerical analysis methods using mathematical modeling and experimental study of processes to validate the main results of the full-scale facilities. Experimental research prototype motor-fans held on the stand. Novelty - for voltage motor-fans developed method for determining the range of the voltage generator power for traction and electrodynamic braking of the locomotive, which is different from the view of changes in the frequency mode of operation, using the characteristics of the outer and idling and rated current of traction synchronous generator - first settled shielding rings shorted rotor winding to improve the control characteristics of asynchronous motor-fan when the voltage on the stator in the steady state and the starting characteristics with dependence obtained in active and inductive resistances shielded from slip rings that allow the skin effect in ferromagnetic screens at regulation. The research results can be used by design agencies that develop cooling systems of diesel locomotives with electric fans. The practical results of the thesis are available for use electrical machine businesses to create a regulated motor-fans for a new series of locomotives and the modernization of production locomotives. The branch of using - electrical engineering.