Spring-applied Brake With Electromagnetic Release

Structure and working principle
●Structure:
The brake is usually composed of a brake rotor, a fixed thrust block, an armature plate, a coil spring, an electromagnetic part and a non-magnetic distance element.
The brake rotor is rotationally fixed but axially movable, set relative to the shaft to be stopped, and arranged between the fixed thrust block and the armature plate.
●How it works:
In the unenergized state, the coil spring acts on the armature plate, causing it to exert pressure on the braking rotor, thus producing the braking effect. This design ensures a fail-safe feature of the brake, which automatically engages in the event of a power failure.
When the electromagnetic part is energized, a magnetic field is generated that attracts the armature plate, causing it to overcome the spring force and move toward the magnetic part. In this way, the brake rotor is released and can rotate freely.
In order to maintain the release state of the brake, the electromagnetic part receives a reduced holding current after the armature plate contacts the magnetic part.

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