The invention proposes an induction generator (200; 301) having a magnet arrangement (204; 304) for generating a permanent magnetic field, an annular coil (206; 306), a spring element (228; 328) and an air channel (212; 312) penetrated by the permanent magnetic field, wherein said magnet arrangement (204; 304) comprises a first pole section (208; 308), a section pole section (210; 310) and a magnet (214; 314) arranged between said first pole section (208; 308) and said second pole section (210; 310), said coil (206; 306) being connected to said spring element (228; 328) and being arranged in said air channel (212; 312) in such a way that it can move, and the spring element (228; 328) being designed to bring about an oscillation movement (224) of the coil (206; 306) in the air channel (212; 312) transversely to a magnetic flux (222; 322) of the permanent magnetic field within the air channel (212; 312) in response to displacement of the coil (206; 306), characterized in that the air channel (212; 312) has an annular shape and is designed to fully accommodate the annular coil (206; 306).