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Abstract
This paper presents an experimental analysis of the overall efficiency of the gearbox for an electric vehicle with a Dual Motor Drive System (DMDS) propulsion system. The efficiency was measured in the powertrain testbed where the gearbox was placed between two dynamometers. The main aim of the experiment was to get relevant values of an overall efficiency as a function of input speed and torque. All these measured values of the gearbox efficiency are included in graphs and efficiency maps. Tests were run with two different amounts of oil charge. The experiment confirmed the expected high values of the overall mechanical gearbox efficiency. The results can be used further for advanced simulations and other electric vehicle experiments.
Highlights
Nowadays, researchers and automobile producers come together in search of a way to increase the efficiency of vehicles by perfecting or changing the technology and concepts incorporating the idea of modern transportation [1]
The subject of measurement was our prototype Dual Motor Drive System (DMDS) gearbox which we designed and made for the purposes of our DMDS research. This prototype gearbox allows for the connection of any two electric motors with a standardized flange NEMA C-face with the limitations of overall maximum input torque at 200 Nm and maximum input speed of 7000 rpm
Each symbol corresponds to a different input speed of the gearbox
Summary
Researchers and automobile producers come together in search of a way to increase the efficiency of vehicles by perfecting or changing the technology and concepts incorporating the idea of modern transportation [1]. Research and development are focused on new drive concepts and systems that allow for greater availability of known technologies in terms of affordability and reliability of these drives [2]. The overall efficiency ηEV includes battery efficiency η1, power converter and electric motor efficiency η2 and gearbox efficiency η3 [4]. PLOSS1 are losses in battery, PLOSS2 are losses in power converter and electric motor, PLOSS3 are losses in gearbox. This article focuses on the last mentioned component – the gearbox efficiency
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