公开(公告)号：US20020039010A1

公开(公告)日：2002-04-04

申请号：US09960116

申请日：2001-09-21

Applicant: MHE Technologies, Inc.

Inventor： Joseph M. Plasz ,  Mark E. Ubl

IPC: G05B019/10

CPC classification number: G05B19/40 ,  G05B2219/37094 ,  G05B2219/50129 ,  G05B2219/50358

Abstract: A material handling system for lifting a load and a method sensing an unstable state of the material handling system. The system includes a motor, a brake and a drive. The method includes storing a model of the motor in the drive and generating a signal in the drive. The signal has a voltage and a frequency. The method further includes providing the signal to the motor, sensing a current value of the signal, determining a modeled value based in part on the sensed current value, comparing an actual value to the modeled value to determine whether the load is stable, and generating an output that sets the brake when the load is potentially unstable.

Abstract translation: 用于提升负载的材料处理系统和感测材料处理系统的不稳定状态的方法。 该系统包括电机，制动器和驱动器。 该方法包括将电机的型号存储在驱动器中并在驱动器中产生信号。 信号具有电压和频率。 该方法还包括向马达提供信号，感测信号的当前值，部分地基于感测到的当前值确定建模值，将实际值与建模值进行比较，以确定负载是否稳定，并产生 当负载潜在不稳定时，设置制动器的输出。