Such as variable frequency drives can be further connected directly to the communications network or hardwired if necessary.

例如变频驱动器如果有必要的话可以直接被连在通讯网络或硬线上。

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Our variable frequency drives (electronic controllers) adjust the speed of electric motors by modulating the power being delivered.

我们的变频驱动器(电子控制器)通过调整电机功率的速度调节的电动传递。

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For this project ABB Italy and ABB South Korea will supply low voltage switchgear, intelligent motor control units and variable frequency drives.

ABB意大利公司和ABB韩国公司将为这个项目提供低压开关柜，智能电机控制单元，以及变频器。

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For example, rather than purchase expensive ultra-efficient motors, low cost opportunistic additions to old fans and pumps such as variable frequency drives and demand controls can deliver equal energy savings at a fraction of the cost.

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