Effect of interference parameters and magnetic adaptability in linear motors

With the increase of the electrical equipment integration complexity in the vehicle systems, the electromagnetic compatibility (EMC) becomes one of key factors to be respected in order to meet the constructor standard conformity. After the introduction of the industrial context, in this paper, a spectrum modelling method of conducted EMC perturbations generated by DC motors in low frequencies is developed. The methodology illustrating the feasibility of the theoretical approach introduced is explained in details. The handling processes of the test bench employed to measure these perturbations are described. Then, the verification results of the apparent approach enabling the achievement of circuit models containing the different elements constituting the motors considered are also offered. We demonstrate that this approach allows us to model mathematically the schematic diagrams which reproduce the mechanism of the brush-collector contact and the EMC perturbation sources. The models developed were validated experimentally by considering the variation of different parameters (speed and power supply) which characterize the DC motor under test. It was shown that good agreements between the motor behaviours and the models proposed were observed. The model investigated is particularly useful for the conducted EMC analysis disturbing the functioning of embedded power electronic systems