Abstract：A novel magnetic field modulation gearing which has two rotors and two layers of inner and outer air gap transmits torque by magnetic force with high density and efficiency, and could be a potential substitution of a mechanical gearing if used in lustration, low temperature, high altitude environment etc. The less pole pairs inner rotor and more pole pairs outer rotor rotate with different speeds and different directions. Due to the different rotation paces and directions of the two rotors, it is very difficult to adjust the meshes in the two air layers when pure finite element analysis is used. Calculating magnetic field by way of numerical and analytical combined method has advantage of no grid in the air gap region when rotors rotate freely, as well as aberration of grid shapes can be avoided. The analytical solution of magnetic vector potential in the whole air gap can be obtained with the value of air gap boundary points, thus the magnetic field harmonics especially the electromagnetic torque can be analyzed conveniently. On the basis of qualitative theoretic analysis and quantitative calculating by the numerical and analytical combined method, a prototype is designed and constructed. The high transmission torque density and efficiency of the magnetic field modulation gearing are illustrated by the test results.
杜世勤, 江建中, 章跃进, 龚宇. 一种磁性齿轮传动装置[J]. 电工技术学报, 2010, 25(9): 41-46.
Du Shiqin, Jiang Jianzhong, Zhang Yuejin, Gong Yu. A Magnetic Gearing. Transactions of China Electrotechnical Society, 2010, 25(9): 41-46.
[1] Peter Omand Rasmussen, Torben Ole Andersen, Frank T Jørgensen, et al. Development of a high-performance magnetic gear[J]. IEEE Transactions on Industry Applications, 2005, 41(3): 764-770. [2] Atallah K, Howe D. A novel high-performance magnetic gear[J]. IEEE Transactions on Magnetics, 2001, 37(4): 2844-2846. [3] Atallah K, Wang J, Howe D. A high-performance linear magnetic gear[J]. Journal of Applied Physics, 2005, 97(10): 10N516.1-10N516.3. [4] Mezani S, Atallah K, Howe D. A high-performance axial-field magnetic gear[J]. Journal of Applied Physics, 2006, 99(8): 08R303.1-08R303.3. [5] Li Yong, Xing Jingwei, Peng Kerong, et al. Principle and simulation analysis of a novel structure magnetic gear[C]. International Conference on Electrical Machines and Systems, 2008: 3845-3849. [6] Nicolas W Frank, Hamid A Toliyat. Gearing ratios of a magnetic gear for marine applications[C]. 2009 IEEE Electric Ship Technologies Symposium, 2009: 477-481. [7] Atallah K, Calverley S D, Howe D. Design, analysis and realisation of a high performance magnetic gear[J]. IEE Proc. Electr. Power Appl., 2004, 151(2): 135-143. [8] 章跃进, 江建中, 屠关镇. 应用数值解析结合法计算旋转电机磁场[J]. 电工技术学报, 2004, 19(1): 7-11. [9] 章跃进, 江建中, 崔巍. 数值解析结合法提高电机磁场后处理计算精度[J]. 中国电机工程学报, 2007, 27(3): 68-72. [10] 章跃进. 旋转电机磁场计算数值解析结合法研 究[D]. 上海: 上海大学, 2005.
2010, Vol. 25 
