Speed Control Motor/Brushless Motor Structure and Lifetime of Electromagnetic Brakes

Brushless Motors

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 against the force of the coil spring, thereby releasing the brake and 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 holding the position when the motor is not excited.
Do not use as a braking device to stop a rotating load.
As the brake lining is not intended for braking, repeated braking will widen the gap due to wear, making normal operation impossible.

The lifetime for starting and stopping loads with permissible inertia is 5 million cycles.

AC Speed Control Motors

The electromagnetic brake motor is equipped with a power off activated type electromagnetic brake for braking.
The structure and lifetime of electromagnetic brakes is the same as that of the AC motors.

Structure and Lifetime of Electromagnetic Brakes (AC Motors)