Band attenuation / rejection filter for electromagnetic radiation of brushed DC motor

摘要

The present invention includes at least a first reactive impedance element (L1) inserted between a positive motor power terminal and a battery positive terminal (+ Bat), a negative motor power terminal and an automobile ground (- At least a first capacitive electrical impedance element (C1) integrated in a coil electromagnetic compatibility (EMC) filter formed by a second reactive impedance element (L2) inserted between And a band attenuation / removal filter for electromagnetic radiation of a brushed DC motor comprising a second capacitive electrical impedance element (C2, C3). According to the present invention, the first capacitive electrical impedance element (C1) is connected in parallel between the positive terminal and the negative motor power supply terminal, and the second capacitive electrical impedance element (C2, C3). Has a lower capacity than that of the first capacitive impedance element (C1) and is connected in parallel between the positive terminal (+ Bat) of the battery and the ground terminal (-Bat) of the motor. The present invention is suitable for equipment for windshield wiper motors of any type of automobile.