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工业机器人与伺服电机的共存关系
伺服电机一般安装在机器人的“关节”处，机器人的关节驱动离不开伺服系统，关节越多，机器人的柔性和精准度越高，所要使用的伺服电机的数量就越多。
机器人对关节驱动电机的要求非常严格，因而对电动伺服驱动系统的要求也很严格，主要有以下几个方面：
1、快速响应性，电伺服系统的灵敏性愈高，快速响应性能愈好;
2、起动转矩惯量比大，在驱动负载的情况下，要求机器人的伺服电机的起动转钜大，转动惯量小;
3、控制特性的连续性和直线性，随着控制信号的变化，电机的转速能连续变化，有时还需转速与控制信号成正比或近似成正比，调速范围宽，能使用1：1000～10000的调速范围;
4、体积小、质量小、轴向尺寸短，以配合机器人的体形;
5、能经受得起苛刻的运行条件，可进行十分频繁的正反向和加减速运行。
另外，由于国产伺服电机有待升级，导致国产机器人发展困难。国产伺服电机目前的现状是，小的不小，大的不大!这个怎么理解呢?小功率伺服电机，小型化不行，普遍偏长，比如轻载机器人常用的200w和400w伺服电机，目前多摩川的tbl-imi系列伺服微电机、松下的a6、安川的σ7电机短小精致。
反观国产伺服，普遍较长，外观粗糙。这在一些高档的应用上不行，尤其是在轻载6kg左右的桌面型机器人上，由于机器人手臂的安装空间非常狭小，对伺服电机的长度有严格要求。
其次是信号接插件的可靠性一直饱受诟病。国产伺服需要继续改进，而且接插件的小型化、高密度化也是趋势，与伺服电机本体的集成设计是个很好的做法，目前日系的伺服电机很多就是这样设计的，方便安装、调试、更换。
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