Elevator energy feedback device

The invention discloses an elevator energy feedback device which comprises a rectangular outer casing, a rotary buckle, a rotary nut, an inlet, a heat dissipation plate, an insulation plate, an outlet, an input port, a voltage sensor, a central controller, a filter capacitor, a three-phase IGBT full bridge, a series inductor, a high-frequency magnetic core choke reactor and an output port. The elevator energy feedback device has the beneficial effects that a bearing is disposed in the rotary nut to ensure that a connecting end can be tightly connected with the device; the insulation plate is an insulating structure made of a polymer insulating material to avoid dangers caused by electric leakage; the filter capacitor is connected in parallel with the output end of a rectifying power supplycircuit to achieve stable working performance of an electronic circuit; the series inductor has only one winding, senses the change of the current, and hinders the change of the current; and the high-frequency magnetic core