摘要
针对通用变频器不能直接用于快速启动、制动和频繁正反转调速场合问题,探讨了变频调速系统中的再生能量产生机理,尤其是对再生能量回馈状态下惯性体的运动能量、有源逆变回馈能量、制动转矩进行了定量分析,揭示了各物理量之间的关系,设计了一种通用变频器能量回馈控制系统。实验表明,该系统馈送电流谐波小,功率因数高,能够有效地实现能量回收和精确制动;该系统使得变频器可以实现四象限运行,节能效果明显。
To solve the problems that general inverter can＇ t meet the need of braking rapidly, running forward and reverse frequently, /he paper deeply discusses the generation mechanism of regenerative energy in variable frequency variable speed systems, and especially the quantitative analysis among the kinetic energy, feedback energy of active inverters and the braking torque, which illustrates their relationships. Then a new-type energy-feedback control system is designed. The experimental results show that the system has the performance of small current harmonic and high power factor and realizes energy recycle and brake precisely. The control system extends the application of general inverter to four quadrants. The effect of application shows that energy can be saved remarkably.
出处
《电机与控制学报》
EI
CSCD
北大核心
2006年第4期356-360,共5页
Electric Machines and Control
基金
国家自然科学基金(50477042)
高等学校博士点基金(20040422052)
山东省自然科学基金资助项目(Z2004G04)
关键词
异步电动机
能量回馈
再生制动
并网技术
asynchronous motor
energy feedback
regenerative brake
grid-connected technology
