Fumiya Kitayama

Proposal of a Two Movers Linear Oscillatory Actuator for Active Control Engine Mounts

Active control engine mounts employing linear oscillatory actuators are mounted onto automobiles to reduce the frame vibration and noise. In conventional ACMs, the electric power consumption is high, and we clarify the causes of the high electric power consumption by dynamic simulation. Moreover, we propose a new LOA with two movers. The operational principle is described and the effectiveness of the ACM is verified using dynamic simulation.

Linear oscillatory actuator using new magnetic movement converter

In this paper, we propose a linear oscillatory actuator that can convert a rotational motion into a linear motion by using a new magnetic movement converter and a dc motor. The basic construction and the operation principle of the proposed actuator are described. Finally, we clarify that the proposed actuator has fewer harmonics in the thrust and the armature position characteristics, and reduces the load torque of the dc motor.

Proposal of Linear Oscillatory Actuator with Two Movers using Three Coils

Electromagnetic type linear oscillatory actuators are used in many devices because of high controllability and small size. In previous studies, a linear oscillatory actuator with two movers and two coils that effectively generates vibrations in a wide frequency range by impressing same-phase or reverse-phase current, is developed. However, two H bridge circuits are needed for driving the actuator. In this paper, a new actuator with two movers that can drive using a threephase inverter, are proposed. First, the characteristics of the proposed actuator are clarified by finite element analysis. Finally, there are compare with those of the conventional actuator.

A New Linear Oscillatory Actuator with Variable Characteristics Using Two Sets of Coils

Nowadays, electromagnetic linear oscillatory actuators are used as vibration control devices because of their high controllability. However, there is a problem that thrust and vibration are small at a wide drive frequency range. In order to improve this problem, we propose a new linear oscillatory actuator that can easily change its own characteristics by using two sets of coils. Through finite element analysis, large vibration was observed at 100 Hz in a series connection, and large vibration and high thrust were observed at 70 Hz and 140 Hz in a parallel connection. From these results, we verified that the actuator had two different characteristics due to switchable connections, and could generate high thrust and large vibration by smaller currents at a wide drive frequency range.