Automatic power generation device for underwater unmanned vehicle

The invention discloses an automatic power generation device for an underwater unmanned vehicle, which is used for the underwater unmanned vehicle. The device comprises a bracket, a power generation cabin and a movable ball; the power generation cabin comprises stator petals, balls and rotor balls; the stator petals are fixedly connected with the bracket; the number of the stator petals is four. A set of alternating current winding is arranged in each stator petal; the four alternating-current windings are connected in series/in parallel; a plurality of permanent magnets with staggered N poles and S poles are attached to the outer surface of the rotor ball; the balls are arranged between the inner sides of the stator petals and the permanent magnets; the rotor balls are connected with the movable ball through a connecting rope; a electromagnetic winding is electrically connected with a rectifier, and the rectifier is electrically connected with a storage battery of the unmanned underwater vehicle. The movable ball drags the rotor balls to enable the power generation cabin to generate power, alternating current in the alternating current windings in the four stator petals is rectified by the rectifier and then charges the storage battery, and the navigation period and the working time of the unmanned underwater vehicle are prolonged.