Automatic voltage regulation of high-efficiency interior permanent-magnet synchronous generators for pico-hydro power generation system

This paper presents a successful automatic voltage regulation of high-efficiency interior permanent-magnet (IPM) synchronous generators for pico-hydro power generation system. A 1-kW 4-pole V-type IPM generator with low voltage regulation is used for laboratory test in stand-alone hydro energy conversion system. It has been found from experimental results that the constant output voltage is supplied stably by the proposed system under wide speed range.