Improvement of the method used for control of starting direkt-currentrailway motor

Improvement of the method of calculation of mechanical characteristics of a traction motor of direct current with combined excitation

“…Main statements of finite elements method. The method of finite elements of the two-measured calculating model and orthogonal coordinates system for the stationary magnetic field is in minimization of the non-linear energetic functional [5,6,10]:…”

“…But the authors of work [5] offer the more rational approachto use combined excitation that gives a possibility to essentially decrease losses and capacity in DC-DC transformer. The authors of work [6] present the improved method of regulating operation modes of the combined excitation motor, but its use for establishing parameters of managing systems is not considered. For determining these parameters, it is necessary to determine magnetic characteristics of the motor that work [7] is devoted to and mechanical characteristics [2].…”

Simulating the traction electric drive operation of a trolleybus equipped with mixed excitation motors and a DC-DC converter

“…Paper [43] gives a theoretical justification for this solution; the solution itself was patented as a method [44]. Subsequently, the authors improved the proposed technique for adjusting DCM excitation and analyzed various circuit solutions [45]. Article [46] suggested an algorithm to control a DC-DC converter; work [47] represented a mathematical model of the traction electric drive with a DC-DC converter.…”

“…Urban electric transport such as subway, tram, trolleybus provides most of the intra-city passenger transportation. At present, in Ukraine, its share is (42)(43)(44)(45)(46)(47)(48)(49)(50)(51)(52)(53)(54)(55)(56) % of the total volume of passenger traffic [1]; this proportion will only increase in the future. This is explained by the fact that, given the increasing cost of fuel and the emission of carbon dioxide into the ambient air [2], the world is replacing conventional buses with electric buses (E-bus).…”