在过去几年中,有些自动扶梯出现事故是由于带载向下运行的梯级超速造成的。根据事故调查发现:它们的机械摩擦制动器扭矩不足,任凭满载梯级加速,即使驱动电动机停电,也不会先减速然后逐渐静止。对自动扶梯进行制动力调节可视为在过度减速和微弱的制动作用之间寻求协调。这个课题对自动扶梯之所以特别重要,是由于在紧急停车情况下,减速力的巨大水平分力作用在自 In the past few years, some of the escalator accidents were caused by rung overspeed with down loading. According to the accident investigation, they found that their mechanical friction brake torque is insufficient, even if the full load step acceleration, even if the drive motor power failure, it will not slow down and then gradually static. Adjusting the braking force on the escalator can be seen as seeking coordination between over-deceleration and weak braking. The reason why this topic is particularly important for escalators is that in the case of emergency stop, the huge horizontal component of deceleration force acts on