PROJECT TITLE :

Theoretical and Experimental Loss and Efficiency Studies of a Magnetic Lead Screw

ABSTRACT:

This paper investigates mechanical and magnetic losses in a magnetic lead screw (MLS). The MLS converts an occasional-speed high-force linear motion of a translator into a high-speed low-torque rotational motion of a rotor through helically formed magnets. Initial tests performed with a unique 17-kN demonstrator and a simplified motor model showed an potency of solely 80percent at low load; however, it absolutely was expected that the efficiency ought to be above ninety five%. For understanding and future optimization, a detailed study of the loss within the MLS is presented with the aim of identifying and segregating numerous loss elements that was not accounted for in previous results. This is done through theoretical loss calculations and various experiments. It's concluded that the linear guide is the dominating loss component within the MLS demonstrator, whereas the losses in the axial thrust bearing isn't as dominant needless to say; furthermore, an efficiency higher than 94p.c was measured.