Brushless Wound Rotor Synchronous Machine Based on a Consequent-Pole Rotor Structure with Better Torque Attributes

Table 2

Specifications of the investigated machines.

Parameter	Basic model	PM-assisted model	Consequent-pole model
Rated power	6.5 [kW]	6.5 [kW]	6.5 [kW]
Stator outer/inner diameter	130/80 [mm]	130/80 [mm]	130/80 [mm]
Air gap length	0.5 [mm]	0.5 [mm]	0.5 [mm]
Rotor outer diameter	79 [mm]	79 [mm]	79 [mm]
Shaft diameter	10 [mm]	10 [mm]	10 [mm]
Machine poles/slots	4/24	4/24	4/24
Main armature winding turns	270 [turn]	270 [turn]	270 [turn]
Additional armature winding turns	270 [turn]	270 [turn]	270 [turn]
Harmonic/Field winding turns	25/250 [turn]	25/250 [turn	25/250 [turn]
Stack length	120 [mm]	120 [mm]	120 [mm]
Winding material	Copper	Copper	Copper
PM volume	—	7.562 [cm^3]	5.507 [cm^3]
PM type	—	NdFeB [Br = 1.4 T]	NdFeB [Br = 1.4 T]