STRATEGY AND IMPLEMENTATION FOR HIGH-SPEED TORQUE ENHANCEMENT OF BRUSHLESS DC MOTOR

Serious commutation lag occurs when a Brushless DC Motor(BLDCM) operates at high speeds,and this leads to torque decline with ripple.In this paper,an advanced conduction control scheme is proposed which can accelerate the commutation and enhance the torque production remarkably.Besides,an on line adjusting algorithm based on the Golden Section Method is adopted to search the optimal advanced conduction angle.Simulation and experimental results verify the feasibility and effectivity of the scheme proposed.

基于传递矩阵法主轴转子临界转速分析

基于传递矩阵法完成精密高速加工中心主轴动态特性分析;用Matlab工具开发了一套具有自主知识产权的动态计算分析软件;对主轴的临界转速和静刚度特性进行了系统的分析。以某款精密高速大转矩加工中心主轴为对象,分析了主轴结构参数对主轴动态特性的影响,以求主轴既能高转速又能大转矩的加工。分析结果表明:基于传递矩阵法编制的主轴动态设计软件运行可靠、操作简便,可应用于加工中心主轴的动态设计与快速开发。