Characteristic Evaluation of The Permanent Magnet Liner Motion Mechanism

Abstract

　We developed a mechanism that convert rotation to linear motion by magnetic force of permanent magnet. The mechanism produces fluctuating torque to drive. We discovered driving two mechanisms that move onto opposite direction at the same time reduce the torque. We call that the way of driving with canceling the torque “Phase inversion drive method”. We investigated the effect of the method. To investigate that effect, we measured static force, static torque, dynamic torque, and power consumption of the mechanism. Compared with a way that drive single mechanism, amplitude of resistance torque is smaller when mechanisms are driven with the method. The effect that reduces resistance torque becomes stronger when linear motion is small. And that lead to reduce driving power consumption. It also reduces the amplitude of linear motion of mechanism that driving mechanisms fast. Therefore, torque reducing effect also become stronger when driving speed of mechanisms is fast.