电梯永磁同步曳引机封星制动转矩提升方法  

Braking Torque Enhancement Method of Star Sealing for Permanent Magnet Synchronous Traction Machines in Elevator System

作　　者：胡亚山 商志国 李永岗 周根富 杨亚军 HU Yashan;SHANG Zhiguo;LI Yonggang;ZHOU Genfu;YANG Yajun(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;Yungtay Elevator Equipment(China)Co.,Ltd.,Shanghai 201615,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]永大电梯设备(中国)有限公司,上海201615

出　　处：《湖南大学学报(自然科学版)》2025年第2期133-139,共7页Journal of Hunan University:Natural Sciences

基　　金：湖南省自然科学基金资助项目(2023JJ30133)。

摘　　要：电梯接触器封星和传统电子封星存在中高速阶段封星制动转矩下降的问题,为保证电梯在中高速失控时安全有效地制动,提出一种基于最优电阻的永磁同步曳引机电子封星制动转矩提升方法,不需要额外装置,利用原有驱动系统实现制动转矩的提升.电机的定子电阻不同,传统电子封星下的制动转矩特性不同,通过分析电子封星下某一固定脉冲宽度调制(pulse-width modulation,PWM)占空比下的电压和电流关系,揭示虚拟电阻与占空比的关系.根据当前电流幅值、母线电压和转速动态地调整PWM占空比,进而改变永磁同步曳引机的等效电阻,与产生最大制动转矩的最优电阻匹配,以此来达到提高电子封星制动转矩的目的.通过实验验证了本文方法的可行性和正确性,电梯在中高速时的制动转矩相较于传统电子封星有明显的提升.The braking torque of an elevator with contactor star sealing or conventional electronic star sealing is decreased at medium and high speeds,to ensure safe and effective braking when the elevator loses control in the medium and high speeds scenario,an electronic star sealing method based on optimal resistance is proposed in this paper,where the braking torque can be enhanced by the original drive system without any additional devices.The braking characteristic varies with different stator resistance when the conventional contactor star sealing is employed.By analyzing the relationship between phase voltage and current with a fixed PWM(pulse-width modulation)duty during electronic star sealing,the relationship between virtual resistance and PWM duty is disclosed.Then,it dynamically changes the PWM duty based on the current amplitude,DC-link voltage and rotational speed,thereby changing the equivalent resistance of the permanent magnet synchronous traction machine,and ensuring that it is equal to the optimal resistance for the maximum braking torque,so as to enhance the braking torque.Finally,the feasibility and correctness of the proposed method were verified through experiments,and the braking torque at medium and high speeds is increased significantly compared with the conventional electronic star sealing.

关 键 词：电梯 封星 制动 转矩提升 最优电阻 

分 类 号：TM351[电气工程—电机]