Linear resonant actuators (LRAs) have been used in a wide range of applications because of their high efficiency. However, the amplitude of LRAs severely decreases when external loads are applied. As a solution to this problem, this paper proposes a disturbance compensation control using sensor-less load estimation. First, we propose a load device which is able to evaluate the dynamic characteristics of an actual LRA mounted on an electric shaver. Next, we verify the effectiveness of the proposed control through measurement using 1-mover LRA and voice coil motor. As a result, measurement using this load device validates the effectiveness of the proposed control.
WatadaM., EbiharaD. and ImachiK., Improvement on characteristics of linear oscillatory actuator for artificial heart, IEEE Trans. Magn.29(6) (1993), 3361-3363.
2.
BuY., OhkuboM., KarasawaM. and MizunoT., Kinetic Thrust Characteristics of Linear Oscillatory Actuator for Active Vibration Control, Proc. of ICEMS (International Conference on Electrical Machines and System), LS1B, 2006, pp. 7-12.
3.
KimT.H., LeeH.W., KimY.H. and LeeJ., Development of a Flux Concentration-Type Linear Oscillatory Actuator, IEEE Trans. Magn.40(4) (2004), 2092-2094.
4.
AsaiY., HirataK. and OtaT., 3-D Finite Element Analysis of Linear Resonant Actuator under PID Control, in Proc. of the 14th Biennial IEEE CEFC (Conference on Electromagnetic Field Computation), 32P8, 2010.
5.
AsaiY., HirataK. and OtaT., PID Feedback Control Method for Linear Resonant Actuator Using an Estimated External Load from the Back-EMF as a Target Voltage, in Proc. of International Symposium on Power Electronics, Electrical Drive, Automation and Motion, FB4, Jun. 2012, pp. 1547-1551.
6.
AsaiY., HirataK. and OtaT., Amplitude Control Method of Linear Resonant Actuator by Load Estimation From the Back-EMF, IEEE Trans. Magn.49(5) (2013), 2253-2256.
