Abstract: A control circuit of an electric motor includes a filtering device in order to filter high frequencies likely to produce perturbing electromagnetic radiation when the electric motor is driven. To this end, the filtering device includes one or more filtering capacitors branched off from a power bridge driving the electric motor, wherein at least a proportion of the filtering capacitors is of a polymer-hybrid type in order to improve dynamic performance of the filtering device and to reduce its size. A motorized-fan unit for motor vehicles including such a control circuit is also disclosed.

Abstract: The invention relates to a control circuit (1) of an electric motor (4), the control circuit (1) comprising a filtering device (13) in order to filter the high frequencies likely to produce perturbing electromagnetic radiation when the electric motor (4) is driven. To this end, the filtering device (13) comprises a first filtering device (131) branched off from a power bridge (12) driving the electric motor (4), each filtering branch forming the first filtering device (131) being located near the power bridge (12) and/or one of the corresponding power branches (A, B, C) of said power bridge (12) so that a length of an electrical conductor (1313) connecting said filtering branch to said power branch is less than 20 mm. The invention also relates to a motorized-fan unit (8) for motor vehicles comprising such a control circuit (1).

Abstract: The invention relates to a control circuit (1) of an electric motor (4), the control circuit (1) comprising a filtering device (13) in order to filter the high frequencies likely to produce perturbing electromagnetic radiation when the electric motor (4) is driven. To this end, the filtering device (13) comprises one or more filtering capacitors (132A-132D) branched off from a power bridge (12) driving the electric motor (4), at least a proportion of the filtering capacitors (132A-132D) being of the polymer-hybrid type in order to improve the dynamic performance of the filtering device (13) and to reduce its size. The invention also relates to a motorized-fan unit (8) for motor vehicles comprising such a control circuit (1).