Improving Energy Efficiency of an Electric Mini Excavator

Construction takes place increasingly in a city environment, which puts limits to noise and gas emissions produced by construction machinery. In city environment work is also often done indoors, where local emission are not allowed. These requirements forces to use zero emission machinery, for example fully electric machinery. This study aims to improve the energy efficiency of a battery powered electric mini excavator. A start & stop logic system was developed to achieve this. The benefits of this system was measured using a test cycle. The cycle was done using the old and the new configuration and the improvement in the operation time proved to be at least 50 % longer than old one.