Pakasit Somsiri

Adaptive Integral Sliding-Mode Position Control of a Coupled-Phase Linear Variable Reluctance Motor for High-Precision Applications

Key factors limiting the greater use of linear motors are motor cost and complexity of controls. This paper develops an adaptive sliding-mode position control of a coupled-phase linear variable reluctance (LVR) motor for high-precision applications. With several distinct features, the LVR motor can be considered a strong candidate for high-performance linear motion applications due to its simple structure, compactness, and low cost with no permanent magnet. The adaptive position controller based on sliding-mode control is considered because of its simple structure and robustness against uncertain perturbations and external disturbances. The designed controller consists of the following: (1) an inner force control loop based on the sinusoidal flux model for simplicity and computational efficiency and (2) an outer position control based on the adaptive sliding-mode control to enhance the system robustness and to achieve high accuracy for highprecision applications. The LVR motor prototype was constructed for laboratory test, and the controller is implemented on a realtime DSP-based controller card. The comparative experimental results clearly show that the proposed controller is suitable for controlling the LVR motor system for high-accuracy applications and effective for reducing the chattering.

A design of switched reluctance motor and drive system for high performance electric motorcycle

Traction drive for electric motorcycle (EM) is one of the most promising applications for switched reluctance (SR) motor. A design of EM system, SR traction drive sub system and components is presented in this paper. A prototype has been manufactured and tested in test facilities as well as in several real road conditions. The prototype passed EMI/EMC and safety standards which make it possible to run fleet test in the near future.