摘要
针对传统的通用变频器采用二极管不控整流或相控整流存在网侧电流谐波含量大对电网的污染比较严重、功率因数低、能量传输不可逆等缺点,论文引入脉宽调制(PWM)整流器技术以取代不可控整流或相控整流。同时传统三相异步电机控制存在浪费能量的问题,论文提出用PWM逆变器来实现变频,可以实现节能的目的。基于三相电压型PWM整流器(VSR)和三相异步电动机的数学模型,提出在整流侧和逆变侧分别采用相应的矢量控制策略,设计出具有网侧单位功率因数控制、低谐波含量、能量可双向传输等优点的双PWM型感应电机变频调速系统。
The traditional inverter usually used uncontrollable diode rectifier or phased rectifier which lead to many problems such as large current harmonic content in grid-side 、low power factor in grid-side and unidirectional power flow.In order to overcome these shortcomings,this paper use pulse width modulational rectifier technology to take place of uncontrollablediode rectifier or phased rectifier.Based on the mathematic model of three phase voltage source PWM rectifier（VSR） and three phase asynchronous motor,corresponding vector control method is respectively developed in the rectifier side and inverter side,the dual-PWM induction motor variable frequency drive system is designed in this paper.It owned many anvantage such as unit power factor control in grid-side low harmonic content and bidirectional power auto transmit.
出处
《机电产品开发与创新》
2017年第1期81-84,共4页
Development & Innovation of Machinery & Electrical Products
基金
"人才培养质量建设-专业建设-高职专业教育教学联盟项目(市级
PXM2016_014306_000006)"资助
