Performance of coreless-winding axial-flux permanent-magnet generator with power output at 400 Hz, 3000 r/min

Abstract

An axial-flux permanent-magnet machine (AFPM) topology with coreless winding is proposed for generator units required aboard ships, aircraft, or hybrid electric vehicles. In the proposed AFPM configuration, the winding consists of rhomboidal-shaped coils encapsulated in fiber-reinforced epoxy resin. The coils have a double-layer arrangement to leave space for a cooling water duct being used to remove heat directly from the interior surface of the winding. The overall machine structure has high compactness and lightness and, due to the lack of the iron core, generator operation with power output at 400 Hz can be accomplished with high efficiency and acceptable voltage regulation. This paper discusses the basic design and construction of AFPM generators with coreless winding and experimental results taken from a 16-pole machine prototype rated 230 N1m, 3000 r/min are finally reported.

Evaluation of conductivity and moisture content of eggs during storage by using transformer method

“…The frequencies selected include those allocated for industrial, scientific and electrical applications in extreme low frequency ranges at 50, 120, 200 and 400 Hz. (Falone et al, 2008;Kim et al, 2007;Ellenrieder et al, 2013;Caricchi et al, 1998).…”

Proposal and development of radial air‐gap coreless generator suitable for small wind turbine used in urban area

“…(5) through (8). Figure 4 shows an exterior photograph of the test radial coreless synchronous generator, and Fig.…”

An Axial-Flux Permanent-Magnet Synchronous Generator for a Direct-Coupled Wind-Turbine System

“…), but, together with B y , will cause eddy currents to flow in the armature conductors and hence will result in eddy current losses. The eddy current loss P e may be computed using the method discussed in [12] and [13].…”

“…Various PM machine topologies have been proposed for direct-coupled wind generator applications, namely outer-rotor design [7], modular design [9], axial-field machine [7], [14], the TORUS generator [5], [6], and coreless generator [12], [13]. These machines have been developed mainly for use with horizontal-axis wind turbines.…”