Servo Motor: Electromagnetic Brake Structure and Service Life
The electromagnetic brake motor is equipped with a power off activated type electromagnetic brake for position holding. An example structure is shown on the right.
When voltage is applied to the exciting coil, the armature is attracted to the electromagnet in resistance to the coil spring and the brake is released, allowing the motor shaft to rotate freely.
When no voltage is applied, the armature is released and the coil spring causes the brake lining to press against the plate, holding the motor shaft in place.
Operation and Lifetime
This brake can be used for position holding without the excitation of the motor.
Do not use as a braking device to stop a rotating load.
As it is not a brake lining designed for braking purposes, repeated braking can lead to wear, causing the gap to widen and preventing proper operation.
The lifetime for starting and stopping loads of permissible inertia is 2 million cycles.