Abstract
This paper investigates mechanical and magnetic losses in a magnetic lead screw (MLS). The MLS converts a low speed high force linear motion of a translator into a high speed low torque rotational motion of a rotor through helically shaped magnets. Initial tests performed with a novel 17 kN demonstrator and a simplified motor model showed an efficiency of only 80 % at low load, however it was expected that the efficiency should be above 95 %. For understanding and future optimization a detailed study of the loss in the MLS is presented with the aim of identifying and segregate various loss components which was not accounted for in previously results. This is done through theoretical loss calculations and various experiments. It is concluded that the linear guide is the dominating loss component in the MLS demonstrator, while the losses in the axial thrust bearing is not as dominant as expected, further an efficiency above 94 % was measured.
Original language | English |
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Title of host publication | Proceedings of the 2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013 |
Number of pages | 8 |
Publisher | IEEE Press |
Publication date | Sept 2013 |
Pages | 2185-2192 |
Article number | 6646977 |
ISBN (Print) | 978-1-4799-0336-8 |
DOIs | |
Publication status | Published - Sept 2013 |
Event | IEEE Energy Conversion Congress and Exposition - Denver, United States Duration: 15 Sept 2013 → 19 Sept 2013 |
Conference
Conference | IEEE Energy Conversion Congress and Exposition |
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Country/Territory | United States |
City | Denver |
Period | 15/09/2013 → 19/09/2013 |