Watchmaking Motors

This lecture covers the application of single-phase motors in watchmaking, focusing on the dissymmetry and mutual couple in bipolar motors, as well as the interaction between magnet-stator geometry and current in the coil. It explains the functioning of quartz and mechanical watches, the equivalent magnetic scheme, and the torque constant estimation. The lecture also discusses energy-saving possibilities, step detection, and the autoquartz watch. Additionally, it explores the use of MEMs technology for micro MEMs motors in watches, the development of hybrid MEMS BLDC micromotors, and the characteristics of studied electromagnetic motors. The presentation delves into the differences between single-phase and three-phase motors, system requirements, and the optimization results for planar coils made of aluminum and copper.