6EP1333-4BA00
精度有两个组成部分,电气和机械。电气错误是由相位不平衡引起的。例如,电机的绕组电阻规格为±10%,可能电机额定功率为10W,但一相可能为9.2W,另一相可能为10.6W。相之间的这种差异会导致转子比另一相更朝向一相对齐。
机械误差有几个组成部分,主要的一个是齿形。虽然电机上的齿应该是方形的,但冲压工艺和模具的使用年限可能会导致某些齿或齿的一部分变圆。当齿变圆时,磁通量不是直接流动,而是可以流动到别处。因此,这些因素会影响电机的精度。
使用全步驱动器,两相电机每 4 步重复一次状态,而在 5 相电机中,状态每 10 步重复一次。由相位不平衡引起的任何电气错误在 2 相中每 4 步和 5 相中每 10 步被否定,只留下机械错误。
一旦电机完成完整的 360° 旋转,同一个齿现在在原始起点处对齐,了机械误差。由于 2 相电机每转 200 步,每 200 步几乎,而 5 相电机每转 500 步,每 500 步几乎。
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