—A method is developed to use a single set of two-dimensional numerical optimizations of inductor winding shapes to simply calculate the optimal winding configuration for any design on the same core without repeating the computationally intensive numerical optimization. For transformer windings, the results are consistent with previous one-dimensional optimizations, but for inductor windings, a...

The delta primary transposed zigzag secondary (DTz) transformer has been designed and used to reduce the bad impacts of the harmonic in the distribution power system. The DTz transformer is constructed with delta connection in primary winding and the three transposed windings at the different core legs of secondary winding. The harmonic reduction method of the DTz transformer applies two basic ...

Abstract: At present, because of their advantages of simple structure, low cost, low power consumption and high efficiency, single winding bearingless permanent magnet synchronous motors (SBPMSMs) have become one of the research hotspots in the bearingless technology field. However, a high motional-electromotive force (EMF) is generated by rotor rotation in the single winding, which already has...

Modeling of convection heat-transfer at the end-windings for thermal networks using lumped-parameters has been widely discussed in literature. Unfortunately, resulting coefficients are highly influenced by end-winding shape, area vicinity end-windings, cooling method this region (if any), as well size and power machine. This makes it extremely difficult designer to choose a suitable coefficient...

In this paper, the hairpin method is applied to an Electric Vehicle (EV) driving motor with a stator winding designed round copper wire. The secure high space factor by using wire instead of for winding. applicable model 300kW Interior Permanent Magnet Synchronous Motor (IPMSM), and cooling water cooling. current density has proportional relationship thermal characteristics, in case wire, lower...

Axial Flux Permanent Magnet Machines benefit from manufacturing advantages and reduction in end winding length through the use of tooth-concentrated fractional windings but display increased space harmonic content, leading to higher eddy current losses in the rotor iron and permanent magnets. The choice of a double layer tooth-concentrated fractional winding for the modeling and design of a 24 ...

We consider the optical dipole potential energy, which arises from interaction of a two-level atom with circularly polarized Laguerre-Gaussian laser beam small waist. The is characterized by existence longitudinal electric field component responsible for appearance chiral term in energy. This reverses sign if either winding number or wave polarization sign. propose scheme bi-chromatic vortex re...

The use of Line-Start Permanent Magnet Synchronous Motors (LSPMSM) improves the efficiency conventional direct-on-line electric motor-driven fluid machinery such as pumps and fans. Such motors have increased compared to induction do not an excitation winding classical synchronous with winding. However, LSPMSMs difficulty in starting mechanisms a high moment inertia. This problem can be exacerba...

The technically pure copper is being replaced by aluminium as conductive material in electrical transformers for power systems. This evolution brings new manufacturing challenges. One major difficulty is the limited weld ability and non-acceptable residual deformations of the aluminium, when welded by fusion arc welding processes. The Friction Stir Welding (FSW) was selected for evaluation cons...

a mathematical modelling for more-winding single-phase transformer is presented. the incidence matrix-which gives the informations about the connection of the ends of the windings between the nodes-is multiplied leftside and rightside with the inverse of the inductance matrix of the more winding transformer. the result is a matrix which gives the relationship between nodes potentials and nodes ...