This paper presents a single-phase slotless axial-flux permanent-magnet synchronous machine for induction heating gensets. A full-scale prototype of the machine (110 kVA, 400 Hz, 690 A) has been designed and subsequently analyzed through finite element analysis (FEA). Induced current distributions in the permanent magnets and in the rotors have also been calculated through FEA, showing that the resulting losses are kept at bay due to the low armature reaction. An effective way of achieving regulation of the power transferred to the load has been analytically derived. The prototype has also been built, and experimental tests confirm the aforesaid analyses.
Axial-Flux Permanent-Magnet Generator for Induction Heating Gensets / Caricchi, Federico Attilio; Maradei, Francescaromana; DE DONATO, Giulio; GIULII CAPPONI, Fabio. - In: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS. - ISSN 0278-0046. - STAMPA. - 57:1(2010), pp. 128-137. ((Intervento presentato al convegno International Conference on Electrical Machines tenutosi a Vilamoura, PORTUGAL nel SEP 06-09, 2008 [10.1109/tie.2009.2028292].