PIZZATO安全开关NG 2D6D426J
但在运用功用和运用场合上存在着较大的差异。现就二者的运用功用作一比较。市场上的步进电机和伺服电机的控制器许多，可是大部分都需求编程才华运用。现在步进电机和伺服电机的用处很广泛，是许多设备优先选用的控制电机，由于需求编程才华控制没有技才干量的厂家难于运用，只得求助外援来处理。W电机步距角一般为3.6°、1.8°。
五相混合式步进电机步距角一般为0.72°、0.36°。也有一些高功用的步进电机步距角更小。如四通公司出产的一种用于慢走丝机床的步进电机，其步距角为0.09°;德国百格拉公司(BERGERLAHR)出产的三相混合式步进电机其步距角可通过拨码开关设置为1.8°、0.9°、0.72°、0.36°、0.18°、0.09°、0.072°、0.036°。
兼容了两相和五相混合式步进电机的步距角。交流伺服电机的控制精度由电机轴后端的旋转编码器保证。以松下全数字式交流伺服电机为例，关于带规范2500线编码器的电机而言，由于驱动器内部选用了四倍频技术，其脉冲当量为360°/10000=0.036°。关于带17位编码器的电机而言，驱动器每接纳217=131072个脉冲电机转一圈。
即其脉冲当量为360°/131072=9.89秒。是步距角为1.8°的步进电机的脉冲当量的1/655。电机在低速时易出现低频振动现象。振动频率与负载状况和驱动器功用有关，一般以为振动频率为电机空载起跳频率的一半。这种由步进电机的作业原理所决议的低频振动现象关于机器的正常工作非常晦气。

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