Design and relay-based control of a novel linear magnetostrictive motor Conference Paper uri icon

abstract

  • Design and relay-based control of a novel linear magnetostrictive motor is presented in this paper. The magnetostrictive material used here is Terfenol-D, an alloy of the formula Tb0.3Dy0.7Fe1.9. In response to a traveling magnetic field inside the Terfenol-D element, it moves in the opposite direction with a peristaltic motion. The proposed design offers the flexibility to operate the motor in various configurations including local and conventional three-phase excitation. In this paper, we demonstrate that the power consumption can be reduced significantly by the local-excitation approach. A new force transmission assembly incorporates spring washers to avoid the wear due to its sudden collision with the Terfenol-D element. The closed-loop control system was implemented using relay control which resulted in an optimal closed-loop performance. The magnetostrictive motor has demonstrated 410-N load capacity with a travel range of 45 mm, and the speed is around 9 mm/min currently. The low speed is due to the local three-phase operation mode, and it could be increased to 60 mm/min by using the conventional three-phase operation. The maximum power consumption by the motor is 95 W. © 2009 AACC.

author list (cited authors)

  • Kim, W., & Sadighi, A.

citation count

  • 7

publication date

  • January 2009

publisher