International Conference on Advanced Technologies(ICAT'22), Van, Türkiye, 25 - 27 Kasım 2022, cilt.1, sa.1, ss.73
The electric vehicle
industry is growing rapidly with the global increase in the production of
electric vehicles (EVs), along with several new automotive companies entering
the industry to compete with the existing automotive industry. Within this
growth, EVs technology has also gained a rapid acceleration in the last ten
years. However, some concerns (fear of low driving range, not being able to
charge fast and not having enough EVs charging stations, etc.) seem to leave
the developing technology a little behind the point it deserves. Efforts to
reduce these concerns and reach the deserved point are continuing rapidly in
all areas of EVs systems. Of these, the ones made on the electric motor are at
the forefront. It is seen that motor types such as induction motor, synchronous
motor, DC motor, permanent magnet brushless direct current motor (PMBLDC) are
used as traction motor in EVs. In this study, an 8 kW output power internal
rotor motor is used, which is in the gearless class of PMBLDC. NdFeB (Neodmium
Iron Boron) type magnet with N35 power density is being examined which is
widely used in the magnetic system in the rotor part of this motor. The effects
of the types (AH, EH, H, M, MX, SH, SHX, UH, X, etc.) in which this N35 type
magnet is classified according to the temperature degrees at which it performs
best in the system on the torque, efficiency and output power of the PMBLDC
gearless motor performance parameters and the maximum speed values that they
can reach in idle operation are analyzed comparatively. These analyses are
carried out at temperatures of 20°C, 60°C and 100°C using the Ansys Maxwell
analysis program, with the finite element method (FEM). The data obtained in
this study will form a data set on the selection of the magnet used according
to the best performance values in the design phase of this type of PMBLDC
gearless motor, which can also be used as a traction motor in electric vehicle
technology.