THE ANALYSIS OF ANALYTICAL FUNCTIONS FOR APPROXIMATIVE DO-ALL MAGNETIC CHARACTERISTIC OF DIRECT – CURRENT AND UNDULATED – CURRENT TRACTION MOTORS

H. K. Hetman, S. L. Marikutsa
2011 Nauka ta Progres Transportu  
A number of functions for approximating the universal magnetic curve and its derivatives, their accuracy and conformity to the requirements put forward by the authors have been studied.
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