The Industry 4.0 has focus on connected devices and machines. It needs a number of sensors connected with each other and transfer of the information. Most of the sensors and sensor nodes require low power. In remote areas, where the power is limited, self-powered devices are more useful. Wind is available everywhere but the wind speed varies from place to place. Windmills are being used to generate electric power from the wind, however, is restricted due to large size and high cost. In this paper, it is proposed to develop a magnetic excited rotary harvester to harvest power at low wind speed. This can solve one of the major problems of frequent replacement of the battery in remote devices required for sensor and sensor nodes. To convert the rotation of the windmill to electric power, the rotation energy is converted to vibrating motion of a piezoelectric cantilever beam. The vibrations in the beam are generated with the help of interaction of magnetic field on the stator and blade mounted on the rotating shaft. The vibrations are then converted to electric charge due to the property of the piezoelectric material. An analytical model is developed and the results are compared with experiments. It is observed that at minimum wind speed of 2 m/s the estimated power is 1.06 mW while at a normal wind speed of 5 m/s power is calculated as 2.21 mW from the device.

工业 4.0 重点关注互联设备和机器。它需要多个传感器相互连接并传输信息。大多数传感器和传感器节点都需要低功耗。在电力有限的偏远地区，自供电设备更有用。风无处不在，但各地的风速不同。风车被用来利用风力发电，但由于尺寸大且成本高而受到限制。在本文中，建议开发一种磁激励旋转采集器以在低风速下采集电力。这可以解决传感器和传感器节点所需的远程设备中频繁更换电池的主要问题之一。将风车的旋转转化为电能，旋转能量转换为压电悬臂梁的振动运动。梁中的振动是借助安装在旋转轴上的定子和叶片上的磁场相互作用产生的。然后，由于压电材料的特性，振动被转换为电荷。开发了分析模型并将结果与​​实验进行比较。据观察，在最小风速为 2 m/s 时，估计功率为 1.06 mW，而在正常风速为 5 m/s 时，设备计算出的功率为 2.21 mW。开发了分析模型并将结果与​​实验进行比较。据观察，在最小风速为 2 m/s 时，估计功率为 1.06 mW，而在正常风速为 5 m/s 时，设备计算出的功率为 2.21 mW。开发了分析模型并将结果与​​实验进行比较。据观察，在最小风速为 2 m/s 时，估计功率为 1.06 mW，而在正常风速为 5 m/s 时，设备计算出的功率为 2.21 mW。