A comparative analysis between classical and modified approach of description of the electrical machine windings by means ofT₀method

Abstract

A comparative analysis between classical and modified approach of description of the electrical machine windings by means of T 0 0 0 method https://doi.org/10. 1515/phys-2017-0111 Received Nov 02, 2017 accepted Nov 12, 2017 Abstract: This paper deals with comparative analysis between classical and modified approach of description of electrical machines windings by means of the T 0 method. The classical formulation (CF) of T 0 method in which the distribution of the turns in the winding is treated the same as naturally determined current paths has been compared to the modified formulation (MF), in which by incorporating coefficients differencing the conductivity the homogeneity of the current density vector J 0 , i.e. turns distribution is achieved. The method of calculating the coefficients correcting the conductivities for the MF approach has been presented. For solving of T 0 method equations, the edge element method (EEM) has been incorporated.

Two-Phase System for Generating a Higher-Frequency Rotating Magnetic Field Excited Causing Hyperthermic Effect in Magnetic Fluids

“…To analyse phenomena in the studied system, the finite element method (FEM) using the threedimensional (3D) approach, based on the formulation of Ω − T 0 [19], was applied. Here, the nodal values of scalar potential Ω were used to define the distribution of the magnetic field, whereas to determine the values of the magnetomotive forces Θ (mmfs) as well as the phase currents i in the windings, the edge values of the vector electric potential T 0 were used [26,27]. Moreover, when formulating the RMF numerical model, the authors also took into account the relationships describing the transformation of magnetic field energy into heat energy in magnetic liquids.…”

Analysis of the Distributions of Displacement and Eddy Currents in the Ferrite Core of an Electromagnetic Transducer Using the 2D Approach of the Edge Element Method and the Harmonic Balance Method

“…In the discussed axisymmetric system, both the displacement and eddy currents states closed current loops (Figure 3); thus, a voltage drop (potential difference V) on branches representing these loops must be equal to zero ∇V = 0 [24]. Moreover, in this paper, the source currents distribution has been determined by means of the vector electric potential T0 (i.e., J = rotT0) [25,26].…”

“…In the discussed axisymmetric system, both the displacement and eddy currents states closed current loops (Figure 3); thus, a voltage drop (potential difference V) on branches representing these loops must be equal to zero ∇V = 0 [24]. Moreover, in this paper, the source currents distribution has been determined by means of the vector electric potential T 0 (i.e., J = rotT 0 ) [25,26]. In the applied approach, EE equations describing the distribution of A potential edge values are equivalent to loop equations of the reluctance network model (RN), which already has been proved [27].…”