西门子 6GK7243-1BX30-0XE0

6GK7243-1BX30-0XE0

随着闭环反馈，电机的负载与转子惯性比也会增加。步进电机可以处理大约 10 倍的转子惯量，而伺服电机可以处理 100 倍的转子惯量。作为比较，闭环步进电机可以处理其转子惯量的 30 倍。

步进电机无需反馈即可运行，因此运行所需的组件更少。这就是为什么它们更具成本效益。伺服电机需要反馈并在 PID 回路中运行，因此需要更多组件。

效率

步进电机使用电流斩波驱动器技术，无论负载如何，它都能提供恒定的电流供应。电流与温度成正比，因此步进电机的占空比需要限制在 50% 左右。 伺服电机提供更有效的电流控制，因为它只吸收所需的电流。步进电机更擅长的一件事是它能够在零速时产生保持扭矩。伺服电机使用更多功率来产生保持扭矩。

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