화학공학소재연구정보센터
IEEE Transactions on Energy Conversion, Vol.27, No.2, 403-410, 2012
A Combined Wye-Delta Connection to Increase the Performance of Axial-Flux PM Machines With Concentrated Windings
In this paper, a combined wye-delta connection is introduced and compared with a conventional wye-connection of a concentrated winding. Because the combined wye-delta connection has a higher fundamental winding factor, the output torque is higher for the same current density when a sinusoidal current is imposed. As the combined wye-delta connection has only a minor influence on the losses in the machine, the efficiency of the machine is also increased. The combined wye-delta connection is illustrated in detail for an axial-flux permanent-magnet synchronousmachine with a rated power of 4 kW at a fixed speed of 2500 r/min, using finite element computation and measurements on a prototype machine.