Hybrid excitation synchronous generators for island operation

Overview of hybrid excitation synchronous machines technology

“…Classical criteria used for classification of other types of electric machines can be used; such as 2D and 3D structures, radial field and axial field structures. However, regarding the particular structure of double excitation machines, the presence of two excitation flux sources, two criteria seem more specific for classification of these machines [6]: 1) by analogy with electric circuits, the first criterion concerns the way the two excitation flux sources are combined: series and parallel double excitation machines [1]; 2) the second criterion concerns the localization of the excitation flux sources in the machine: both sources in the stator, both sources in the rotor and mixed localization. By mixed localization it is meant that one source (excitation coils or permanent magnets) is located in the rotor or the stator and the other source in the stator or the rotor respectively.…”

“…By mixed localization it is meant that one source (excitation coils or permanent magnets) is located in the rotor or the stator and the other source in the stator or the rotor respectively. Having excitation coils in the stator is favored to avoid sliding contacts [6].…”

“…Indeed, the presence of sliding contacts implies some drawbacks, as brush sparking and slip ring maintenance problem. Nevertheless, hybrid excited structures with slip rings do exist [3], [6], [19][20][21][22]; problems linked to the presence of sliding contacts being less restrictive for relatively low power applications in which these structures may be used. Fig.…”

“…Hybrid excitation principle can also be used to reduce PM volumes and save material cost. Some comprehensive reviews on hybrid excited topologies can be found in [1], [2], [4][5][6][7][8][9]. An alternative and updated review will be provided in this paper.…”

Analysis of Magnetic Field and Electromagnetic Performance of a New Hybrid Excitation Synchronous Motor with dual-V type Magnets

“…In the past decades, many kinds of new HESM topologies have proposed and studied, which are mainly focused on the claw-pole type [8][9][10], the parallel type [11][12][13], rotor magnetic shunt type [14,15], and the combined rotor type [16], and most of them are used in generator systems. However, there are two main problems in these types of HSEMs.…”