电梯制动电阻热变形的案例分析

A Case Study of Thermal Deformation of Elevator Braking Resistor

在电梯安全评估的过程中发现一起制动电阻过热变形的案例,通过阐述变频器能耗制动电路的构成方式和工作原理,给出制动电阻参数的工程算法,进而分析出导致制动电阻热异常的原因,最后结合检验现场情况,提出制动电阻安装的注意事项,为制动电阻的选型和安装提供依据。

In the process of elevator safety assessment, a case of braking resistance overheating deformation was found. This paper describes the composition and working principle of the inverter braking energy circuit, gives the engineering algorithm of the braking resistance parameters, and analyzes the causes of brake resistance thermal anomalies. At last, according to inspection situation, the installation attentions for the selection of braking resistance is put forward, which provides the basis for the selection and installation of braking resistance.