Wideband Impedance Measurements and Modeling of DC Motors for EMI Predictions

Fatou Diouf , Frank Leferink (1) , Fabrice Duval (2) , Mohamed Bensetti (3)

1 Telecommunication Engineering [TE]
2 IRSEEM - Institut de Recherche en Systèmes Electroniques Embarqués
3 GeePs - Laboratoire Génie électrique et électronique de Paris

In electromagnetic interference prediction, dc motors are usually modeled as a source and a series impedance. Previous researches only include the impedance of the armature, while neglecting the effect of the motor's rotation. This paper aims at measuring and modeling the wideband impedance of a dc motor under operating conditions. These measurements are performed by injecting a small signal, using a method based on conducted susceptibility measurement setups as described in military standards. Different setups are developed to cover a wideband, from 0 Hz up to 200 MHz. The measurements provide satisfying results for the wideband impedance of the rotating dc motor, and the setups’ validation is discussed. Finally, the resulting impedance is modeled as a passive impedance network.

Domaines: Sciences de l'ingénieur [physics]

Fatou Diouf, Frank Leferink, Fabrice Duval, Mohamed Bensetti. Wideband Impedance Measurements and Modeling of DC Motors for EMI Predictions. IEEE Transactions on Electromagnetic Compatibility, 2015, 57 (2), pp.180-187. ⟨10.1109/TEMC.2014.2370454⟩. ⟨hal-01102405⟩