| Abstract [eng] |
Popularity of alternative energy powered transport is growing every day and manufacturers are forced to look for new solutions to make reliable, long lasting products. One of the key component of electric and hybrid cars is electric motor. The aim of this study is to design liquid-cooled asynchronous electric motor with 63 kW peak power and 900 Nm torque. Electric motor housing is designed with computer-aided design software SolidWorks. Developed motor is used in computational fluid dynamics analysis with SolidWorks integrated software Flow Simulation. Temperature analysis of electric motor showed that using epoxy resin significantly reduces maximum temperature of motor components. Epoxy resin transfers heat from the stator windings to the housing and maximum temperature decreases from 127.54 °C to 84.659 °C and the coolant temperature increases from 28 – 30 °C to 33 – 37 °C. For theoretical calculations confirmation test electric motor was made. After testing in real life conditions dependency on driving mode, acceleration and braking cycles and ambient temperature is visible. Tests showed that average temperature of motor housing outside surface is 36 – 38 °C. The results falls within the limits of theoretical analysis (theoretical housing external surface temperature is between 30 – 45 °C), so the calculations can be considered reliable. Theoretical calculations and practical tests show that the electric motor maximum temperature will not reach the maximum allowable levels. |
