基于解耦矢量控制的五相永磁同步电机容错控制策略

针对五相永磁同步电机两相开路故障的运行工况,提出了一种基于解耦矢量控制理论的故障容错控制策略.该策略通过在两相开路故障下的同步旋转坐标系内建立电机的数学模型,构造解耦变换矩阵,将电流控制中id和iq轴解耦,达到两相开路故障下容错运行的目的 .仿真结果表明,在五相永磁同步电机两相开路故障下,基于解耦矢量控制理论的故障容错控制策略能够实现电机驱动系统的高品质运行,具有控制简单、转矩波动小、容错能力强等优点.     

飞机主动侧杆系统用双三相永磁同步电机的设计与转矩性能分析

针对主动侧杆系统的运行需求，本文设计了一款双三相永磁同步电机，介绍了该种电机的基本结构和优点，分析了极槽配合和裂比两大关键参数的设计方法，研究了在空间限制下电机尺寸设计策略，分析了关键参数对电机性能的影响，对比了参数变化时电机转矩、转矩脉动的变化趋势，研究了电机的优化方向和参数，确定了电机的结构尺寸、绕组分布等参数。通过仿真验证了理论设计的正确性。所设计的电机输出转矩符合设计需求，转距脉动较小，不会为操纵杆手柄带来震荡的问题。电机单余度工作情况下，仍然可以达到额定转距的输出需求，保证了系统的安全性。     

基于萤火一号技术的自主火星探测器方案

提出了基于萤火一号（YH-1）火星探测器技术的自主火星探测器方案,可携带多种有效载荷在准太阳同步圆轨道上对火星进行科学探测。该方案具有可实现性强、成本低、研制周期短等特点,并能满足火星探测后续工程中的环绕器设计要求,利于我国火星探测的长远发展。利用长征三号乙运载火箭,在西昌卫星发射中心就可实现2013/2016年的我国自主火星探测。     

Design and analysis of a novel hybrid cooling method of high-speed high-power permanent magnet assisted synchronous reluctance starter/generator in aviation applications

To improve the heat dissipation performance, this paper proposes a novel hybrid cooling method for high-speed high-power Permanent Magnet assisted Synchronous Reluctance Starter/Generator (PMaSynR S/G) in aerospace applications. The hybrid cooling structure with oil circulation in the housing, oil spray at winding ends and rotor end surface is firstly proposed for the PMaSynR S/G. Then the accurate loss calculation of the PMaSynR S/G is proposed, which includes air gap friction loss under oil spray cooling, copper loss, stator and rotor core loss, permanent magnet eddy current loss and bearing loss. The parameter sensitivity analysis of the hybrid cooling structure is proposed, while the equivalent thermal network model of the PMaSynR S/G is established considering the uneven spraying at the winding ends. Finally, the effectiveness of the proposed hybrid cooling method is demonstrated on a 40 kW/24000 r/min PMaSynR S/G experimental platform.