In an electrically operated motor brake, what action occurs when current is applied?

In an electrically operated motor brake, what action occurs when current is applied?

• A. The brake pads retract, releasing the rotor
• B. The brake system calibrates to the correct torque
• C. It squeezes the inner and outer friction discs together
• D. The rotor stops due to magnetic repulsion

Answer: (C)

Applying current energizes the braking electromagnet and pulls the pressure components together, squeezing the inner and outer friction discs. When the discs are pressed, their friction surfaces grip the rotor, converting the motor’s kinetic energy into heat and bringing it to a stop. This clamping action is how the brake engages in this design. The other ideas—calibrating torque, stopping by magnetic repulsion, or pads retracting to release the rotor—do not describe what happens when current is applied in this type of electrically operated brake.

Applying current energizes the braking electromagnet and pulls the pressure components together, squeezing the inner and outer friction discs. When the discs are pressed, their friction surfaces grip the rotor, converting the motor’s kinetic energy into heat and bringing it to a stop. This clamping action is how the brake engages in this design. The other ideas—calibrating torque, stopping by magnetic repulsion, or pads retracting to release the rotor—do not describe what happens when current is applied in this type of electrically operated brake.