motor

Abstract

An electric machine for a vehicle, comprising a stator, and a rotor comprising a plurality of poles, where each pole comprises a first V-shaped flux barrier and a second V-shaped flux barrier, where the first flux barrier comprises two magnets with inner air cavities and outer air cavities, where the second flux barrier comprises two magnets with inner air cavities and outer air cavities, and where the flux barriers are arranged adjacent each other and symmetrically to the d-axis, where the pole comprises a first V-shaped flux redirector arranged symmetrically to the d-axis and between the first flux barrier and the second flux barrier. The advantage of the invention is that an electric machine with an improved performance and reduced torque ripple is provided.

Description

technical field [0001] The invention relates to an electric machine comprising a rotor with a multi-baffle design, preferably a permanent magnet assisted reluctance machine suitable for hybrid, plug-in hybrid and electric vehicles. Background technique [0002] Some electric motors with rotors that include permanent magnets embedded in the rotor will exhibit strong reluctance variations depending on the configuration of the magnets and barriers. These motors are often used as electric drive motors with variable speed, for example in electric vehicles or hybrid vehicles, and comprise a plurality of rotor poles. The difference between the direct inductance Ld along the d-axis direction of the magnetic pole and the quadrature inductance Lq along the q-axis of the magnetic pole is called saliency and when the driving motor is switched on and off the driving circuit When properly driven, a so-called reluctance torque is generated. The d-axis is defined to be aligned with the ma...

AI Technical Summary

Problems solved by technology

[0006] This approach, and others like it, can solve some of the problems related to magnetic saliency and motor saturation, but motors still have room for improvement

Images