CAJ | 학술논문

用于伺服系统的永磁同步电机,一般具有较小的转动惯量,可能使得电机的机械时间常数小于电磁时间常数.电流环在动态过程中不能有效抑制反电动势的扰动,电流的动态响应明显变差.为了减小反电势在转速动态过程中对电流环产生的扰动,两对比研究2种不同的补偿方法:改进电流环控制器的方式和在电流调节器输出处对反电动势进行的补偿方式.在仿真研究基础上,确定采用反电动势补偿方式进行实验.实验结果验证了当电机惯量较小时加入补偿措施后可以使电机在恒加速时反馈电流无差的跟随给定电流指令.
용우사복계통적영자동보전궤,일반구유교소적전동관량,가능사득전궤적궤계시간상수소우전자시간상수.전류배재동태과정중불능유효억제반전동세적우동,전류적동태향응명현변차.위료감소반전세재전속동태과정중대전류배산생적우동,량대비연구2충불동적보상방법:개진전류배공제기적방식화재전류조절기수출처대반전동세진행적보상방식.재방진연구기출상,학정채용반전동세보상방식진행실험.실험결과험증료당전궤관량교소시가입보상조시후가이사전궤재항가속시반궤전류무차적근수급정전류지령.
In servo system, permanent magnet synchronous motor(PMSM) generally has small inertia ,which could make the electromechanical time constant less than electromagnetic time constant. Face with such situation, the current loop in a dynamic response cannot resist the disturbances of back-electromotive-force (BEF), and dynamic responses of current deteriorate sharply. In order to reduce the disturbances of current loop by BEF in the speed dynamic process, comparative research studied two different compensation methods: improving the current loop controller and compensating the BEF at the current regulator output. Base on the simulation of the two methods, it determined to use the compensation of BEF in physical experiments. The experimental results verified that when the motor is with small inertia,the method of compensation of BEF makes the feedback current no error following the reference current during constant acceleration.