This paper completed the layout and design of condenser pump using VFDs.

本文完成了凝结水泵变频调速系统规划设计。

youdao

So, when you use a lot of VFDs, you really should look at the total harmonic content.

所以，如果你采用了大量的变频器，就确实需要查看一下谐波电流的总量。

youdao

So our VFDs have been able to ride through these outages, as long as we keep the control power active.

他说到，“所以只要保持控制电源有电，我们的变频器就能够在停电时维持运转。”

youdao

SilverStone makes many different HTPC style cases, but we chose this one because of its two large cooling fans, six internal hard drive bays, plain black front (no VFDs or exposed ports), solid construction, and it is rackmountable.

ENGADGET: How-To: Build a practical HTPC