目前,世界各国的不少农(牧)场广泛采用化学除草。但化学除草方法会引起空气污染,影响人的健康。因此,目前北美、西欧诸国很重视对进口农产品的检验,如发现农产品中含化学药量过多,则禁止进口。为此,北美、西欧各国开始发展电力除草技术,以保证农产品的质量。电力除草技术的工作原理是采用较高电压的直流发电机,安装在拖拉机的动力输出轴后面,用拖拉机带动电力除草机进行作业。除草机上,有导引直流电回路的倾斜翻滚叶轮。使发电机输出的电流通过一个 At present, many herbivores in many countries in the world use chemical weeding. However, chemical weeding methods can cause air pollution and affect human health. Therefore, at present, North and West European countries attach great importance to the inspection of imported agricultural products. If they find that agricultural products contain too much chemical, they are forbidden to import. To this end, North America, Western European countries began to develop electricity weeding technology to ensure the quality of agricultural products. Electric weeding technology works by using a higher voltage DC generator installed in the rear of the power output shaft of the tractor, with a tractor driven by electrical weeder work. On the weeder, there is a tilt-and-turn impeller that guides the DC circuit. The generator output current through one