What is electric motor design service and Why Do We Use Them?

The com­pa­ny OSWOS was found­ed in 2016 in Düs­sel­dorf and is active since 2019 in Berlin, for the lead­ing vehi­cle man­u­fac­tur­ers and sup­pli­ers from the field of elec­tro­mo­bil­i­ty. There­by, our ref­er­ences from the auto­mo­tive and defense indus­try speak for us. Our team takes great pride in pro­vid­ing our cus­tomers with cus­tomized elec­tric dri­ve solu­tions at the high­est lev­el. Although we only con­sist of a hand­ful of peo­ple, every­one on the team brings many years of pro­fes­sion­al expe­ri­ence work­ing for the fol­low­ing companies.

When and why do you also need a 3D sim­u­la­tion? Well, 2D sim­u­la­tion assumes that the struc­ture is repeat­ed in the Z‑direction. But if you look at the elec­tric motor from above, for exam­ple, this is not the case at the top and bot­tom ends of an elec­tric motor. Stray flux­es can occur at the top and bot­tom ends of the motor and one should esti­mate how large their influ­ences are. For very short elec­tric motors, the influ­ence of stray flux­es can be large. There­fore, the results of the 3D sim­u­la­tion should be used again in the 2D sim­u­la­tion. Because the cal­cu­la­tion of an elec­tric motor char­ac­ter­is­tic curve in a 3D sim­u­la­tion would require too much com­put­ing capac­i­ty and time. Anoth­er exam­ple where 3D sim­u­la­tions are need­ed are axi­al flux motors where the elec­tro­mag­net­ic field changes in all 3 dimen­sions. In very long elec­tric motors, bend­ing vibra­tions of the shaft can occur, caus­ing the dis­tance between rotor and sta­tor to change over the length. This dis­tance is also called air gap and its change has of course influ­ence on the torque and its course.