Modeling and experimental investigations of a reactive homo-heteropolar brushless synchronous machine

Abstract

In this work is presenting a reactive homoheteropolar brushless synchronous machine (RHHBSM), with stator excitation destined to operate as low power generator in hydroelectric, or wind power stations, or as servomotor with reduced inertia. We proposed in this paper a modeling and a simulation method by electric-magnetic coupled network, based on the permeance network, 3D analysis with a specialized software and the machine's orthogonal model.One prototype machine has been studied. Within this paper, we make a comparison between the results obtained by modeling with the magnetic equivalent circuits, finite element method and experimental results.I.

Wind or Hydro Homo-Heteropolar Synchronous Generators: Equivalent Magnetic Circuit and FEM Analysis

“…By means of the equivalent magnetic circuits method [11][12][13][14][15] is deduced the equivalent diagram of the magnetic circuit which is presented in fig. 9 [3]. In fig.…”

“…(8) Based on these premises, considering the configuration of the RHBSM or RHHBSM, presented in fig. 1, where λ i,j is the permeance between the stator tooth i and the rotor pole j depending on angle ϑ between the axis of stator tooth i and the axis of the rotor pole j, the permeance in the air-gap has the expression [3]:…”

“…The values of permeances, fluxes and ampere-turns from fig. 12 have the expressions (23), (24) and (25) [3], where μ Fe and μ 0 are the magnetic permeabilities of the iron core and air, S Fe and S a the sections, l m /2 the field line's length, λ rFe the rotor iron permeance under a pocket of laminates beneath which has entered the rotor pole to a central angle ϑ i -ϑ (ϑ i is the central angle corresponding to a pocket of laminates beneath which has not entered the rotor pole), λ ra the air's rotor permeance under a pocket of laminates corresponding to the central angle ϑ, λ r the rotor equivalent permeance under a pocket of laminates.…”

“…Conception constraints on electro-technical devices require numerical simulations to be as close as possible to its actual operating conditions. Then, it is necessary to have coupled physical models of devices, especially, for electrical, magnetic and mechanical coupled models which allow the simulation of loaded rotating machines [3].…”

Homo-heteropolar synchronous machine for low power variable speed wind or hydro applications: Design, 3D FEM validation and control

“…The new topology is characterized by an electrical excitation winding placed in stator. Placing both the DC excitation coils and the three-phase AC winding on the stator characterizes this topology of homopolar (figure 1) [2,3], or homo-heteropolar synchronous machine (figure 2) [4][5][6]. The attractive advantages of this kind of machine are its better controllability in the very large speed range and the flexibility of the output generator characteristics [8,9].…”