Thermal models of electric machines with dynamic workloads

• Main Authors: Christian Pohlandt, Marcus Geimer
• Format: Article
• Language: deu
• Published: Kuratorium für Technik und Bauwesen in der Landwirtschaft e. V. 2015-07-01
• Series: Landtechnik
• Online Access: http://www.landtechnik-online.eu/ojs-2.4.5/index.php/landtechnik/article/view/2664

Electric powertrains are increasingly used in off-highway machines because of easy controllability and excellent overall efficiency. The main goals are increasing the energy efficiency of the machine and the optimization of the work process. The thermal behaviour of electric machines with dynamic workloads applied to is a key design factor for electric powertrains in off-highway machines. This article introduces a methodology to model the thermal behaviour of electric machines. Using a noncausal modelling approach, an electric powertrain is analysed for dynamic workloads. Cause-effect relationships and reasons for increasing temperature are considered as well as various cooling techniques. The validation of the overall simulation model of the powertrain with measured field data workloads provides convincing results to evaluate numerous applications of electric machines in off-highway machines.