Li Zheng, Zhao Hui, Chen Xuetong, Du Shenhui, Guo Xiaoqiang, Sun Hexu
School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China.
Micromachines (Basel). 2022 Jun 16;13(6):955. doi: 10.3390/mi13060955.
Piezoelectric-driven multi-degree-of-freedom motors can turn off self-lock, withstand high and low temperatures, are small in size and compact in structure, and can easily achieve miniaturization. However, they have a short life cycle and limited applications. In addition, high-intensity operation will result in a decrease in their stability. Electromagnetic-driven multi-degree-of-freedom motors, on the other hand, are simple and highly integrated, but they are large in volume and lack positioning accuracy. Therefore, combining the two drive modes can achieve complementary advantages, such as improving the motor's torque, accuracy, and output performance. Firstly, the structure of the hybrid drive motor is introduced and its working principle is analyzed. The motor can achieve single and hybrid drive control, which is beneficial to improving the performance of the motor. Secondly, the influence of magnetization mode, permanent magnet thickness, slot torque, and stator mode on the motor is analyzed. Thirdly, the structure of the motor is determined to be 6 poles and 15 slots, the thickness of the permanent magnet is 12 mm, and the radial magnetization mode is used. Finally, the mixed torque and speed of the motor in the multi-degree-of-freedom direction are tested by experiments, which indirectly verifies the rationality of the structure design.
压电驱动的多自由度电机能够解除自锁，耐高温和低温，尺寸小且结构紧凑，易于实现小型化。然而，它们的生命周期较短且应用有限。此外，高强度运行会导致其稳定性下降。另一方面，电磁驱动的多自由度电机结构简单且高度集成，但体积较大且缺乏定位精度。因此，将两种驱动模式结合可以实现优势互补，例如提高电机的扭矩、精度和输出性能。首先，介绍了混合驱动电机的结构并分析了其工作原理。该电机能够实现单一和混合驱动控制，这有利于提高电机的性能。其次，分析了磁化模式、永磁体厚度、槽转矩和定子模式对电机的影响。第三，确定电机结构为6极15槽，永磁体厚度为12毫米，并采用径向磁化模式。最后，通过实验测试了电机在多自由度方向上的混合转矩和转速，间接验证了结构设计的合理性。
