风冷型永磁调速机散热方法研究

随着国内节能减排行业的蓬勃发展,永磁调速机(又称永磁调速器)已开始逐步成为工业领域中普遍使用的节能调速装置之一。针对现有永磁调速机的散热问题,提供一种结构简单、可靠性高、安装方便并且具有更好散热性的水雾式风冷永磁调速机,以克服现有技术上的缺陷、扩大永磁调速机的使用场合。

水雾式永磁调速机的研制

风冷式永磁调速机很难应用在400 kW以上的负载。为此,开发一种结构简单、可靠性高、成本低、安装方便并且具有更好散热性的水雾式永磁调速机,大大扩展了永磁调速机的使用范围。

永磁同步变频一体机研究与应用

通过分析国内外煤矿井下工作面刮板输送机驱动系统应用现状,针对其启动过程中存在的发热量大、启动转矩小、设备运行效率低以及成本高等问题,利用永磁电动机矢量闭环控制技术,借助MATLAB仿真软件分析刮板输送机重载启动及过载工况下的优化设计,设计了一套应用于刮板输送机的高压永磁同步变频一体机,能够减少设备磨损、延长使用寿命,节省维修成本,为井下智能刮板输送机调速系统提供技术保证与支持。

CFB锅炉二次风机节能改造与优化运行

通过对齐鲁热电厂CFB锅炉二次风机安装永磁机调速器的节能技术改造,实现了二次风机入口挡板全开改为用永磁机调速器转速来调节风机的送风量,特别是在CFB锅炉低负荷时,能够提高风机的效率,达到了节能的目的。

A new PMSM speed modulation system with sliding mode based on active-disturbance-rejection control

A sliding mode and active disturbance rejection control(SM-ADRC)was employed to regulate the speed of a permanent magnet synchronous motor(PMSM).The major advantages of the proposed control scheme are that it can maintain the original features of ADRC and make the parameters of ADRC transition smoothly.The proposed control scheme also ensures speed control accuracy and improves the robustness and anti-load disturbance ability of the system.Moreover,through the analysis of a d-axis current output equation,a novel current-loop SM-ADRC is presented to improve the system’s dynamic performance and inner ability of anti-load disturbance.Results of a simulation and experiments show that the improved sliding-mode ADRC system has the advantages of fast response,small overshoot,small steady-state error,wide speed range and high control accuracy.It shows that the system has strong anti-interference ability to reduce the influence of variations in rotational inertia,load and internal parameters.