A high efficient electromagnetic torque adjustable armature winding permanent-magnet coupling is of a rotating disc type structure. It is composed of at least one group of axial magnetic field armature winding permanent-magnet coupling modules (401,402), at least one pack of a driving permanent-magnet coupling rotating disc coupling mechanism and a corresponding driving shaft coupling joint (310) which are suitable for a driving rotating disc (70) in the permanent-magnet coupling modules, at least one pack of a driven permanent-magnet coupling rotating disc coupling mechanism and a corresponding driven shaft coupling joint (311) which are suitable for a driven permanent-magnet coupling rotating disc in the permanent-magnet coupling modules, a pack of air gap interval regulating mechanisms of permanent-magnet coupling rotating disc and a pack of integrated assembly mechanisms (315、317) which integrates the system into an integrated structure convenient for package, transportation and installation. The permanent-magnet coupling is suitable for technical fields of transmission shaft coupling driving, load speed regulation and power dragging.
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