Solar energy is one of the most abundant sources of renewable energy in Indonesia. Solar
energy is now typically harnessed using solar panels, but the low efficiency of photovoltaic …

This manuscript discusses the design and construction of an active sun-tracker for an
unmanned surface vehicle (USV).'Morvarid'is a robot boat built for automatic hydrography in …

The demand for the high-performance and low-cost position control actuators in many
applications promotes the development of three-phase hybrid stepper motors. The torque …