In this paper,two different mathematics models are established,aiming at the calculation problem for the cogging torque of single-phase low power BLDCM with asymmetrical air gaps and the cogging torque is analyzed qualitatively using analytical method.
针对不对称气隙小功率单相永磁无刷直流电动机定位力矩的计算问题建立了两种数学模型 ,用解析的方法对定位力矩进行了定性的分析 ,用有限元方法进行了实例计算 ,并用实验方法进行了验
Test results show that low-power multi-frequency network is an ideal scheme for digital television ter- restrial coverage and application.
针对中国数字电视地面广播需求,通过DTMB技术的覆盖试验,测试结果表明:小功率多频网是地面数字电视覆盖和应用的理想方案。