An electromagnetic galloping energy harvester with double magnet design

This paper proposes an electromagnetic device equipped with a double magnet design that can harvest energy from natural, low-speed wind (global average of 3.28 m/s). The tip prism activated by aeroelastic galloping is equipped with four magnets arranged in an opposing-pole formation, producing a concentrated magnetic-flux gradient through the coil without requiring mechanical links. A prototype device (110 × 105 × 25 mm³) is tested in a wind tunnel and analyzed by numerical simulation. The device begins to provide power at a wind speed of 1.5 m/s, producing an average electrical power output of 1.41 mW at 4 m/s. This configuration is notable for its extreme simplicity.