PWM变频调速在电梯困梯故障救援装置中的应用

PWM Variable Frequency Variable Speed in Application to Elevator Salvation Unit

介绍一种大规模专用集成电路ＨＥＦ４７５２作为ＳＰＷＭ信号发生器，逆变器采用晶体管模块的ＰＷＭ变频调速系统，并把这个系统应用于电梯困梯救援装置．试验表明。

This paper introduces a PWMvariable frequency variable speed system using large-scale special integrated circuit HEF4752 as SPWM signal generator and transistor module as inverter. The system is applied to elevator salvation unit. The test shows this unit is suitable for elevator salvation.