US 11,855,494 B2
Filter circuit on an electric motor
Philipp Harjung, Schwaikheim (DE); Martin Fuerst, Ingolstadt (DE); and Alexander Ruehle, Remshalden (DE)
Assigned to Andreas Stihl AG & Co. KG, Waiblingen (DE)
Filed by Andreas Stihl AG & Co. KG, Waiblingen (DE)
Filed on Oct. 22, 2021, as Appl. No. 17/508,687.
Claims priority of application No. 20 204 647 (EP), filed on Oct. 29, 2020.
Prior Publication US 2022/0140701 A1, May 5, 2022
Int. Cl. H02K 11/02 (2016.01); H02K 11/026 (2016.01); H02K 17/30 (2006.01); H03H 1/00 (2006.01)
CPC H02K 11/026 (2013.01) [H02K 17/30 (2013.01); H03H 1/0007 (2013.01); H05K 2201/0715 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A filter circuit on an electric motor, wherein the electric motor has a rotor and further has connections for electrical connection of the electric motor to a supply voltage, wherein the connections of the electric motor are provided on a connection end of the electric motor, the filter circuit comprising:
a capacitor bridge arranged between the electrical connections of the electric motor;
wherein the filter circuit is arranged on a circuit board;
wherein the circuit board with the filter circuit is held on the connection end of the electric motor;
said capacitor bridge having a first interference suppression capacitor and a second interference suppression capacitor;
said capacitor bridge forming a conductor branch;
said first interference suppression capacitor and said second interference suppression capacitor being electrically connected in series in said conductor branch;
said first interference suppression capacitor of said capacitor bridge having first electrical connections and defining a first longitudinal axis extending between said first electrical connections;
said second interference suppression capacitor of said capacitor bridge having second electrical connections and defining a second longitudinal axis extending between said second electrical connections; and,
said first interference suppression capacitor of said capacitor bridge and said second interference suppression capacitor of said capacitor bridge being arranged on the circuit board such that said first longitudinal axis and said second longitudinal axis are aligned in different spatial directions (x,Y).