Duplex-winding hybrid excitation brake

The invention discloses a duplex-winding hybrid excitation brake, belongs to the technical field of electromagnetic mechanisms and aims at solving the problems that the existing electromagnetic brake has a low brake torque, a lower residual-magnetism-phenomenon response speed and low reliability. The duplex-winding hybrid excitation brake comprises a brake armature, an outer iron core, a permanent magnet, an inner iron core, an inner winding, an outer winding, a fixing piece and a plurality of supporting rings, wherein the outer iron core and the inner iron core are coaxial parts with L-shaped sections; the L-shaped bottom of the outer iron core faces inwards along the radial direction; the L-shaped bottom of the inner iron core faces outwards along the radial direction; the permanent magnet is arranged between the bottom of the axial outer iron core and the inner iron core; an upper-opening annular area is enclosed by the outer iron core and the inner iron core; an inner winding and an outer winding are arranged in the annular area; the brake armature is of a circular ring structure which is coaxial with the outer iron core; a circular-ring shaped end surface of the brake armature faces towards the opening of the annular area; the brake armature is fixed on the fixing piece by the plurality of supporting springs; and the fixing piece is fixed on a motor bearing.