Evaluation of the driving performance of a surface acoustic wave linear motor

This paper describes influences of a pre-load and vibration amplitude on driving performance of a surface acoustic wave (SAW) linear motor, and proposes a simulation model for the SAW linear motor. In experimental results, maximum output force and maximum output power of the SAW linear motor depended on it's pre-load. Optimum pre-loads for the maximum output force and for the maximum output power were both linear functions of the SAW linear motor's vibration amplitude. No-load velocity of the SAW linear motor, however, decreased linearly with increasing pre-load. A new simulation model to explain these phenomena is proposed. There is a good agreement between the experimental and simulation results.