IEEE TRANSACTIONS ON MAGNETICS, VOL. 49, NO. 3, MARCH 2013 Investigation of a Novel Radial Magnetic-Field-Modulated Brushless Double-Rotor Machine Used for HEVs Ping Zheng, Jingang Bai, Chengde Tong, Yi Sui, Zhiyi Song, and Quanbin Zhao Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, P. R. China IEEE TRANSACTIONS ON MAGNETICS, VOL. 49, NO. 3, MARCH 2013 教授：王明賢 學生：夏傳詠

Outline POWER FACTOR ANALYSIS Abstract Introduction OPERATING PRINCIPLE OF RADIAL MFM-BDRM URBAN IOT ARCHITECTURE POWER FACTOR ANALYSIS CONCLUSION

Abstract the first-PM rotor and the modulating ring rotor by analytical method. Besides, on the basis of analyses of magnetic field distribution in the inner and outer air gap, the back electromagnetic force and torque performance of the radial MFM-BDRM are further studied by finite- element method (FEM). Furthermore, considering the weak mechanical strength of modulating ring rotor employing DW310 laminations, an attempt to use iron instead of DW310 in modulating ring rotor is investigated. 由於無人機負載有限 所以他們做了一個低成本自主飛行微型四旋翼 透過visual SLAM算法(視覺同步定位和繪圖)實現自主飛行 懸停和軌跡追蹤 以室內和室外無GPS環境測試控制性能

Introduction The compound-structure permanent-magnet synchronous machine (CS- PMSM), which consists of a rotor with three-phase windings, a rotor with permanent magnets on both sides and a stator with three-phase windings, is a new power-split concept for HEVs Compared with the Prius hybrid system with the planetary gear unit, the CS-PMSM can not only realize the same function of Prius hybrid system but has advantages such as compact structure, low noise and high efficiency 微型無人機，重量輕 體積小 聲音小 敏捷性高 四旋翼簡單的構造搭配複雜的控制達到高性能 現在感測器 處理器做得很小，甚至全部集合成一小塊板子

OPERATING PRINCIPLE OF RADIAL MFM-BDRM

POWER FACTOR ANALYSIS

CONCLUSION Magnetic field distribution in different parts of the machine shows that there are prominent distinctions in amplitudes and frequencies of the magnetic fields in each part of the machine. By further study of core loss distribution of every part, it shows that the core loss mainly exists in the first stator. Considering the weak mechanical strength of modulating ring rotor employing DW310 laminations, an attempt to use iron instead of DW310 in modulating ring rotor shows that the core loss of modulating ring rotor using iron is far larger than that using DW310, which is far beyond the design requirements.