Electric Motors

design and development 

We devel­op all types of elec­tric motors exact­ly cus­tomized to the require­ments of our cus­tomers. Our core com­pe­tence is the elec­tro­mag­net­ic, ther­mal and mechan­i­cal design of elec­tric motors. We also take care of the con­struc­tion and plan­ning of the man­u­fac­tur­ing of the com­plete elec­tric dri­ve sys­tem for our customers.


1. Design

We help you to find out which type of elec­tric motor is the best for your appli­ca­tion. With the newest sim­u­la­tion tools, we cal­cu­late an elec­tric motor design that max­i­mizes per­for­mance and effi­cien­cy. Of course, we also focus on min­i­miz­ing the man­u­fac­tur­ing costs when we design the elec­tric motor.

2. Construction

We take over the com­plete con­struc­tion of the elec­tric motor with all com­po­nents that belong to it. You will receive draw­ings and 3D mod­els of all designed com­po­nents such as shaft, bear­ing, hous­ing, rotor, mag­nets and sta­tor. There­fore we use stan­dard­ized com­po­nents from our con­struc­tion kit for elec­tric motors. 

3. Manufacturing

In coop­er­a­tion with our part­ners of many years we build first pro­to­types for you. We also devel­op con­cepts for the man­u­fac­tur­ing of the elec­tric motor for you, in order to pro­duce it in high vol­umes. This also includes the pur­chas­ing of indi­vid­ual com­po­nents, such as the sta­tor’s lam­i­na­tions or the rotor’s mag­nets from the lead­ing suppliers.

Custom Electric Motors

High Torque Motors (HTM)

Our High Torque elec­tric motors achieve a torque of up to 15000 Nm with­out the use of a gear­box. Thus, an up to 10 % high­er over­all effi­cien­cy can be achieved com­pared to a dri­ve with a spur gear with two gear stages. In addi­tion, the HTM elec­tric motors are char­ac­ter­ized by their slim design, which allows them to be inte­grat­ed direct­ly into the vehi­cle rim.

High Speed Motors (HSM)

Our high speed elec­tric motors are char­ac­ter­ized by speeds of up to 100000 rpm, with accel­er­a­tion of up to 250000 rpm/s. To ensure opti­mum sta­bil­i­ty at these high speeds, we use a sleeve made of car­bon. In addi­tion, pre­ci­sion bear­ings are used for low-noise and vibra­tion-free oper­a­tion, with very low mechan­i­cal losses.

High Efficient Motors (HEM)

Our high-effi­cien­cy elec­tric motors achieve out­stand­ing effi­cien­cies of up to 98 %. This is made pos­si­ble by the use of hair­pin tech­nol­o­gy and wave wind­ings, which dras­ti­cal­ly reduce cop­per loss­es. In addi­tion, a V‑shaped arrange­ment of the per­ma­nent mag­nets gen­er­ates an addi­tion­al reluc­tance torque. In this way, high effi­cien­cies are achieved over a wide speed range.

Company and References

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.


Customer Applications


We help vehi­cle man­u­fac­tur­ers to increase the range of elec­tric vehi­cles, motor­cy­cles and trucks and reduce costs for their elec­tric motors.


Espe­cial­ly to the require­ments of very high speeds and low weight, we have devel­oped spe­cial elec­tric motors for heli­copters, air­planes and drones.


We help man­u­fac­tur­ers of motor boats, sail­ing yachts and tug boats to select the right elec­tric motors to match the ship’s pro­peller and motor speed.


We help you to find the opti­mum gear ratio to max­i­mize the dynam­ics of your actu­a­tor with the small­est pos­si­ble elec­tric motor.


We help you to devel­op low-cost gen­er­a­tors for wind tur­bines, which pro­duce high pow­er at dif­fer­ent wind speeds.


We help you to adjust the elec­tric motor to the char­ac­ter­is­tic curve of the pump impeller to max­i­mize the effi­cien­cy of the pump.

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