Abstract
The article is devoted to designing, modeling and application of new traction electric drives of rail vehicles (trams) created on the basis of an unconventional electric machine - a synchronous jet machine of independent excitation. The possibility of using such an electric drive for a low-floor tram with a 100% low floor value has been considered. The parameters of an electric motor with a relatively long rotor are given. The switching losses in a massive rotor are analyzed. The specific indicators are considered in comparison with the traditional noncontact electric drive - frequency-controlled asynchronous. Comparative calculations of an electric machine for tram-bogies of different concepts - external and internal components of the electric drive and reducer - are given. The influence of the shape of the stator current on the pulsation of the electromagnetic moment of the motor has been investigated. The problem of accounting for energy losses in a massive rotor under various stator current control laws has been considered. The optimal shape of the stator current is chosen to minimize the switching losses in the stator and rotor of the electric machine. The influence of the shape of the cross section of the stator on the switching losses in the rotor is considred.
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