A Hybrid Excited Machine with Flux Barriers and Magnetic Bridges

Abstract

In this paper, an U-shape flux barrier rotor concept for a hybrid excited synchronous machine with flux magnetic bridges fixed on the rotor is presented. Using 3D finite element analysis, the influence of axial flux bridges on the field-weakening and-strengthening characteristics, electromagnetic torque, no-load magnetic flux linkage, rotor iron losses and back electromotive force is shown. Three different rotor designs are analyzed. Furthermore, the field control characteristics depending on additional DC control coil currents are shown.

Simulation and Experimental Research of Claw Pole Machine With a Hybrid Excitation and Laminated Rotor Core

“…Due to this design, these machines have much better properties. Synchronous machines with hybrid excitation are characterized by having two sources of excitation [5,6,9,10]. The first is the excitation that comes from permanent magnets.…”

Hybrid Excited Synchronous Machine with Wireless Supply Control System

“…Control systems of hybrid excited synchronous machines differ from those of conventional permanent magnet excited synchronous machines (PMSM). They have the ability to adjust the excitation flux by using an additional control coil [6][7][8]. This feature gives the possibility of the dynamic flux control that provides an additional degree of freedom of the machine control.…”

“…The field weakening (which is obligatory) requires design of machines with lower power conversion characteristics. This caused the development of hybrid excited synchronous machines [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. These machines have PM excitation and an additional toroidal excitation coil fixed on the stator or mounted in the rotor in the machine axial center.…”

“…By the proper powering of this coil, the amplitude of the induced voltage can be effectively controlled in the range from zero to values above those of classical permanent magnet machines. The hybrid excited synchronous machines have already been designed, optimized and measured very intensively [6][7][8][9].…”

Improving efficiency in determining the inductance for the active part of an electric machine's armature by methods of field modeling

“…Depending on operating modes of electrotechnical and electromechanical systems, these calculation methods are grounded on commonly known exchange circuits and are built on a series of assumptions and simplifications. Moreover, authors do not take into account influence of surface effects [12], multicomponent spatial structure [13], nonlinear electrophysical [14] and magnetic [15] properties of active materials and winding circuits [16]. All these assumptions cause a decrease in accuracy of determining active and inductive parameters of phase windings of the EM armature.…”