Critical review of the analytical approaches accounting for interbar currents and experimental study of ageing in two-speed asynchronous motors for elevator drives

Limitations/capabilities of electric machine technologies and modeling approaches for electric motor design and analysis in plug-in electric vehicle applications

“…MEC can take saturation into account if the expected saturation locations are known. By using this method, local saturation, leakage and iron losses, etc., can be modeled more accurately and with lower calculation times than FEA [141][142][143][144][145][146]. Various nonlinear solution techniques for the networks such as fixed-point iteration [147,148] and the Newton-Raphson formulation [149] and transmission line modeling [150] have been reported.…”

The impact of different stator and rotor slot number combinations on iron losses of a three-phase induction motor at no-load

“…Laminations with higher number of slots have teeth with smaller width and are therefore more affected by punching effects compared to laminations with small number of slots. Skewed die-cast (non-insulated) rotors are also susceptible for losses due to inter-bar currents, which depend most significantly on the bar-to-iron resistance [10,11]. These losses are embodied in the total iron loss measured in no-load tests.…”

A Multi-Sliced Finite Element Model for Induction Machines Incorporating Inter-bar Current

“…8 (i.e., effectively that used in a 2-slice model using Circuit A). It can be related to the actual resistances in Circuits A, B and C using n = 5 and equations (1) to (4). It can be seen that the parallel end-ring section does not make much difference (so that circuits B and C were not simulated with this to save processing time by reduction of the circuit components).…”

“…More latterly there has been an interest in inter-bar currents, which can have a noticeable effect in motor performance when the rotor is skewed -and this is a function of both manufacture [3] and aging [4]. An excellent review of inter-bar modeling methods was carried out in [4]. The methods used to model skew are usually analytical although there are some full 3D finite element solutions (e.g., [5]).…”