Rotor Pole Pitch Factor Influence on the Operation Parameters of a 9/10 Pole Permanent Magnet Synchronous Machine

The present paper is aimed to determine the pole pitch factor influence on the operating parameters for the considered structure. Transient analysis is used to obtain the results for each of the studied pole pitch factor. The results concern the cogging torque values, the back EMF, medium torque and torque ripple values

Regarding the NVH Behaviour of the more Electric Vehicles. Study Case of a Small PM Motor

The noise and vibration behaviour of electric and hybrid vehicles is dramatically different from conventional vehicles. The noise and vibration mechanisms of the individual components (combustion engine, electric motor, transmission etc.) are known in principle, but an electric or hybrid powertrain features additional and different components as well as new operation modes compared to a conventional powertrain. This results in new interactions which are uncommon in this form for conventional vehicles. In the case of the electric traction, the electric motor becomes an important noise and vibrations source. Depending on the design of the motor, the electromagnetic (EM) pulses and corresponding torque pulses from the motor can be very strong. These can be radiated as noise directly from the motor housing and can also be transmitted structurally to the support structure through the motor mounts. However, the EM forces are generally lower than the combustion and reciprocating mass forces of an IC engine, and significantly, they are at a much higher frequency. On the other side, the electric drives are quite numerous in cars. Lot of smaller motors are involved in X-by-wire systems or other comfort oriented systems. As a study case, the paper is focused on the NVH produced by a 0.25kW PM motor

Comparative FEM-based Analysis of Multiphase Induction Motor

This paper presents a comparative study of multiphase induction motor, which has alternately three-, five- and six-phase stator winding. The machine has been designed particularly for this purpose and has individual ring coils placed in each stator slot. The study consists in FEM analyses and mainly looks for the particularities of magnetic quantities such as air-gap flux density and electromagnetic torque