Low cost adjustable speed sensorless 12/8 switched reluctance drive for low power and low voltage applications

This paper is devoted to sensorless control of 12/8 switched reluctance motor drives for low power and low voltage applications, which require adjustable speed. For simplicity, fault tolerant features, size reduction, better adaptation to harsh environments and economy a sensorless control implemented in a cheap and well known 8-bit microcontroller using two different clock frequencies are considered (20 or 40 MHz). Performance comparison between these proposals and a 12/8 conventional switched reluctance drive with position sensors is also included.