Multiobjective Optimization of a Traction Motor in Driving Cycles Using a Coupled Electromagnetic–Thermal 1D Simulation

Table 5

Main parameters and working conditions of IPMSM.

Description	Unit	Value
Poles/slots	—	8/48
Stator outer radius	mm	132
Rotor outer radius	mm	80
Rotor inner radius	mm	55
Airgap length	mm	0.75
Stack length	mm	84
Lamination factor	—	0.95
Magnet length	mm	17.9
Magnet thickness	mm	7.2
Magnet angle	deg	150
Remanent flux density of magnet (25°C)	T	1.03
Maximum current	Arms	216
Maximum voltage	Vrms	170
Thermal conductivity of steel	W/(m∙K)	51.9
Thermal conductivity of magnet	W/(m∙K)	47.3
Thermal conductivity of coil	W/(m∙K)	400
Thermal conductivity of coil insulation	W/(m∙K)	0.26
Slot fill factor	—	0.45
Density of steel	kg/m^3	7650
Density of magnet	kg/m^3	7500
Density of coil	kg/m^3	8940
Thermal capacitance of steel	J/(kg∙K)	460
Thermal capacitance of magnet	J/(kg∙K)	502
Thermal capacitance of coil	J/(kg∙K)	385
Maximum torque (25°C)	Nm	360
Rated speed at maximum torque (25°C)	rpm	1250