Chorna V. Control and complex protection of traction direct current electric drive of mine contact electric locomotive

The object of the study is electromechanical and thermal processes in the elements of the complex mine electromechanical traction electric contact. The aim of the thesis - improving the efficiency and reliability of the electric traction direct current drive shaft electric contact by improving the structure of the electromechanical towards the inclusion of sub-systems of control and protection of electrical equipment from abnormal operating conditions. Methods: Theory of electric traction direct current converters semiconductor, method of Petri nets, mathematical and physical modeling. The theoretical results for the first time proved and offered for practical implementation of the concept, which generalizes and develops the theory of the analysis of electromagnetic processes in order to further the development of effective two-pack type of traction electromechanical systems direct current and evaluation of emergency modes of operation of their components specific to the operation; for the conditions of modern refined iron ore mines known research into the formalization of the potential sources of possible damage to the components of electric traction direct current; for the first time on the basis of the theory of Petri nets and constructed a network model created a new structure of the complex subsystem control and protection elements of miner contact electric locomotives from abnormal operating conditions; developed in the structure of the direct current electric traction the new structure of an integrated system with real safety parameters of electrical traction module from overcurrent and overvoltage; carried out further development of the theory of the study of thermal conditions of direct current traction motors miner contact electric conditions for natural and mechanical ventilation, and new analytical relationships that enabled the development of new methods of sensors monitoring the temperature of the direct current traction motors and electric speed in underground conditions. Bottom Line: developed and approved electric functional circuit integrated protection from emergency situations; developed methods and circuit solutions contactless control and protection of electric traction motors mine electric locomotives from exceeding temperature modes of operation, contactless control the speed of the mine electric locomotives; designed circuit solutions with comprehensive system protection from emergency modes of operation and structure of the electric traction control. The degree of implementation - the results implemented in enterprises Ltd. "Electrozahyst", PC "Kryvorizkyi zalizorudnyi kombinat", in the educational process of Kremenchuk national university Myhaylo Ostrogradskiy memorial. The scope (area) of application: mining industry.