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变频电机的接线方法通常分为两种：三线制和四线制。

三线制

三线制适用于功率较小的变频电机，其接线方式如下：

（1） 将变频器的U、V、W三相输出线分别连接到电机的U、V、W三相电源线上。

（2） 变频器的地线和电机的地线相连。

（3） 将变频器的输入端口连接到电源上，同时也需要接地线。

四线制

四线制适用于功率较大的变频电机，其接线方式如下：

（1） 将变频器的U、V、W三相输出线分别连接到电机的U、V、W三相电源线上。

（2） 变频器的地线和电机的地线相连。

（3） 将变频器的输入端口连接到电源上，同时也需要接地线。

（4） 在变频器和电机之间加装一个独立的电抗器，用于减小变频器输出电压的谐波含量，保护电机。

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