Coil optimization design of permanent magnet vibration-to-electrical power generator

Induction coil is one of the key components of permanent magnet vibration-to-electrical power generator (VEPG). Here, the equivalent turn number of coil (ETNC) is introduced to build the relationship between the induction coil's structure and magnetic field. And the dynamic magnetic flux density is calculated by finite element method (FEM). The optimized induction coil is fabricated according to the calculating result. The peak-to-peak voltage and effective value voltage of the optimized coil increase up to 52.59% and 48.76%, respectively, compared with the uniform coil.