Advanced

Direct electromagnetic actuation on high ratio gears

Reinap, A. LU ; Alakula, M. LU and Domingues, Gabriel LU (2016) 22nd International Conference on Electrical Machines, ICEM 2016 In Proceedings - 2016 22nd International Conference on Electrical Machines, ICEM 2016 p.743-749
Abstract

This document demonstrates a conceptual study, design and development of unconventional electromagnetic actuators for applications where a high torque over a limited part of a rotational turn is required. The unconventionality of the actuators is that the electromagnetic actuation is applied directly on a high ratio transmission gear such as a cycloid disc in a cycloid drive or a flex-spline in a harmonic drive. Furthermore, normal forces are intentionally used to displace and rotate a cycloid disc or deform a flex-spline instead of tangential forces, which are typically used when integrating conventional rotating machine driving a high ratio gear transmission. The conceptual study is based on a number of finite element models where the... (More)

This document demonstrates a conceptual study, design and development of unconventional electromagnetic actuators for applications where a high torque over a limited part of a rotational turn is required. The unconventionality of the actuators is that the electromagnetic actuation is applied directly on a high ratio transmission gear such as a cycloid disc in a cycloid drive or a flex-spline in a harmonic drive. Furthermore, normal forces are intentionally used to displace and rotate a cycloid disc or deform a flex-spline instead of tangential forces, which are typically used when integrating conventional rotating machine driving a high ratio gear transmission. The conceptual study is based on a number of finite element models where the idea is first presented and followed by field and force analysis. A finite element static model is used to calculate the expected excitation versus the gear location. The gear location of the cycloid disc is defined by an eccentric origin and rotation angle while the flex-spline is defined by a deformation and rotation angle. The analysis of the integrated normal force actuator inside the harmonic drive demonstrates the challenging strain gearing action in terms of elasticity and magnetic saturation. The challenge with the cycloid drive is the electromagnetic action force direction compared to the desired mechanic reaction force direction that causes unnecessary inner load or even locks the gear mechanisms. A prototype machine with the maximized rotor eccentricity is used to characterize four different rolling and geared cycloid transmissions.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
cycloid drive, electromagnetic actuator, Finite element analysis, harmonic drive
in
Proceedings - 2016 22nd International Conference on Electrical Machines, ICEM 2016
pages
7 pages
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
22nd International Conference on Electrical Machines, ICEM 2016
external identifiers
  • scopus:85007281835
ISBN
9781509025381
DOI
10.1109/ICELMACH.2016.7732609
language
English
LU publication?
yes
id
cc7ceedd-d3c7-4e49-a584-984d6aab6535
date added to LUP
2017-01-13 11:25:27
date last changed
2017-01-13 11:26:44
@inproceedings{cc7ceedd-d3c7-4e49-a584-984d6aab6535,
  abstract     = {<p>This document demonstrates a conceptual study, design and development of unconventional electromagnetic actuators for applications where a high torque over a limited part of a rotational turn is required. The unconventionality of the actuators is that the electromagnetic actuation is applied directly on a high ratio transmission gear such as a cycloid disc in a cycloid drive or a flex-spline in a harmonic drive. Furthermore, normal forces are intentionally used to displace and rotate a cycloid disc or deform a flex-spline instead of tangential forces, which are typically used when integrating conventional rotating machine driving a high ratio gear transmission. The conceptual study is based on a number of finite element models where the idea is first presented and followed by field and force analysis. A finite element static model is used to calculate the expected excitation versus the gear location. The gear location of the cycloid disc is defined by an eccentric origin and rotation angle while the flex-spline is defined by a deformation and rotation angle. The analysis of the integrated normal force actuator inside the harmonic drive demonstrates the challenging strain gearing action in terms of elasticity and magnetic saturation. The challenge with the cycloid drive is the electromagnetic action force direction compared to the desired mechanic reaction force direction that causes unnecessary inner load or even locks the gear mechanisms. A prototype machine with the maximized rotor eccentricity is used to characterize four different rolling and geared cycloid transmissions.</p>},
  author       = {Reinap, A. and Alakula, M. and Domingues, Gabriel},
  booktitle    = {Proceedings - 2016 22nd International Conference on Electrical Machines, ICEM 2016},
  isbn         = {9781509025381},
  keyword      = {cycloid drive,electromagnetic actuator,Finite element analysis,harmonic drive},
  language     = {eng},
  month        = {11},
  pages        = {743--749},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Direct electromagnetic actuation on high ratio gears},
  url          = {http://dx.doi.org/10.1109/ICELMACH.2016.7732609},
  year         = {2016},
}