Dynamic braking refers to slowing or stopping a rotating system while it is moving. It requires the brake to absorb kinetic energy and convert it into heat. Key considerations include stopping time, energy per stop, thermal capacity, and fade resistance. Static holding (parking) refers to maintaining torque while the system is stationary to prevent motion, rollback, or load drop. The main requirement is sufficient holding torque with an appropriate safety factor, plus stable friction behavior over time.
Some brakes can do both, but not all. A brake designed mainly for holding may not dissipate enough heat for frequent dynamic stops and can overheat or wear quickly. Conversely, a brake optimized for dynamic stops may not be ideal for long-duration holding if creep or thermal expansion affects torque stability.
For cranes and hoists, both functions are critical: dynamic braking helps stop the load smoothly, and static holding secures it at rest. Correct sizing, friction material selection, and clearances ensure reliable performance in both modes.
