This invention relates to a planetary gear drive unit transferring power by mutual induction between magnets including an off-shaft (input), output shaft, internal gear, planetary gear and a base fixing the off-shaft in which the planetary gear is composed of a base fixed on the off-shaft and a magnet block fixed on the planetary gear base, the internal gear includes gear based and a magnet block mounted corresponding to the magnet block on the planetary gear to realize power transfer by mutual induction, the planetary gear and the internal gear are driven by manget induction, planetary gear and the base on the off-shaft are driven by pin-shaft joint or magnet induction. |