多旋翼无人机电机减振加固结构设计

研究外转子无刷电机在额定负载运行时的振动量,以12槽14极永磁同步电机作为研究对象,分析电机的气隙磁场分布情况,对电机定子施加径向电磁力,计算电机的机械振动和电磁振动。设计一种无人机用无刷电机减振固定结构,优化定子齿轭参数、绕组排布策略,有效降低低阶径向激振力波;将机座与固定底座一体化处理,围绕定子铁心做加强支撑,填充缓冲材料,在模块之间设置弹性连接,达到调整电磁方案的预期效果。飞行实验结果表明,改装减振结构的电机在额定负载运行时,电机功耗有所改善,且电机的振动量最大降低约26.19%,有效提升无人机运行时的能效比。

The vibration of the outer rotor brushless motor under rated load is studied. Taking the 12-slot 14-pole permanent magnet synchronous motor as the research object, the air gap magnetic field distribution of the motor is analyzed,and the radial electromagnetic force is applied to the stator of the motor. The mechanical vibration and electromagnetic vibration of the motor are calculated. A kind of vibration damping fixed structure of brushless motor for UAV is designed,the stator yoke parameters and winding arrangement strategy are optimized, the low-order radial shock wave is effectively reduced, and the machine base is integrated with the fixed base to strengthen the support around the stator core. Fill the buffer material and set up an elastic connection between the modules to achieve the expected effect of adjusting the electromagnetic scheme. The flight experimental results show that when the motor with the modified damping structure is running under the rated load, the power consumption of the motor is improved, and the vibration of the motor is reduced by about 26.19%, which can effectively improve the energy efficiency of the UAV.