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.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
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
关键词
高精度加载
能量回馈
变频器
伺服电机
high-precision load
energy feedback
converter
servo motor
