Dynamic performance of tubular linear actuator with Halbach array and mechanical spring driven by PWM inverter

This paper describes dynamic performance of a tubular linear actuator with Halbach array and mechanical spring driven by a pulse wide modulation inverter. By expressing mechanical components as motional impedance from a motion equation, this paper investigates the variation of not only active and reactive power dissipated in the actuator but also current and power factor for the actuator for various values of frequency and predicts theoretical resonant frequency. Finally, experimental results for dynamic characteristics such as current and stroke are presented for various values of frequency including resonant frequency.