Increased Power Density of Electric Motors

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Basic research on the thermal conductivity of the motor winding is done with an extra built setup. With the knowledge of the measurement results the design of future winding can be improved to increase the power density of electric motors.


In hybrid and electrical cars, the power density is of major importance as space is precious in cars. To increase the continuous power density, the thermal behaviour of electric motors was investigated. Since the results revealed that the winding creates a bottleneck in the thermal resistance chain, the winding was studied further.

A test bench was constructed to research the thermal conductivity of motor winding samples precisely. This basic research enabled the influence of different factors, such as wire diameter, production parameters etc. to be tested. This knowledge could then be used to develop new windings with an increased thermal conductivity to increase the power density of futures motors for electric drivetrains in the automotive industry.


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