能量回馈式负载装置高精度加载策略及应用研究  

High precision load strategy and application research for energy feedback load device

作　　者：李和明[1] 王博[1] 赵海森[1] 马娥 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]安平供电局,河北衡水053600

出　　处：《华北电力大学学报（自然科学版）》2014年第2期15-19,共5页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51307050);中央高校基本科研业务费项目

摘　　要：相对于传统加载装置,由变频器及伺服电机所组成的能量回馈式负载单元具有动态响应快、测试节能等优点,已在测试领域得到广泛应用。但是,受负载电机与被试电机机械联接影响,该负载单元加载精度并不理想。以一套电动机能效测试系统为例,建立了该负载单元的抽象简化模型,分析了影响加载精度的原因;提出了两种高精度加载策略,并给出软件通讯方案设计。实测表明,采用比例积分控制及模糊控制策略后,该负载单元的加载精度可由7.0%提升至变频器驱动精度1.0%,能量回馈率高达93%,节能效果显著。Comparing with traditional load devices, the energy-feedback load unit that servo motor driven by converter owns a variety of advantages like fast dynamic response and energy-saving test, etc. , which is widely used in the tes- ting field recently. However, load precision is not so ideal because of mechanical connection between test motor and servo motor. Taking a motor efficiency test system for example, the paper establishes the simplified model of load unit and analyzed the reasons and aspects of low-precision load in details. Moreover, two high-precision load strategies and design of software communication scheme are presented. Field test indicates that after adopting the proportion integrator （PI） or fuzzy control strategy, load precision can increase effectively from 7.0 % to 1.0 % , and energy saving rate ran up to 93 % maximally and energy conservation effect is remarkable.

关 键 词：高精度加载 能量回馈 变频器 伺服电机 

分 类 号：TM351[电气工程—电机]