How Electromagnetic Brake Works
Release Date:23/04/2016
How Electromagnetic Brake Works
Engagement: Electromechanical brakes operate via an electric actuation, but transmit
torque mechanically. When voltage/current is applied, the coil is
energized creating a magnetic field. This turns the coil into an
electromagnet that develops magnetic lines of flux. The magnetic flux
attracts the armature to the face of the brake. The armature and hub are
normally mounted on the shaft (customer supplied) that is rotating.
Since the brake coil is mounted solidly, the brake armature, hub and
shaft come to a stop in a short amount of time.
Disengagement: When
current/voltage is removed from the brake, the armature is free to turn
with the shaft. In most designs, springs hold the armature away from the
brake surface when power is released, creating a small air gap.
Cycling: Cycling is achieved by turning the
voltage/current to the coil on and off. Slippage should occur only
during deceleration. When the brake is engaged, there should be no
slippage once the brake comes to a full stop.
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