What is the most common concern with using variable frequency drives?

And, so it has proved in most applications. Occasionally, though, running an AC motor off a variable frequency drive can lead to problems that ... “VFD common mode voltage induces current in the motor shaft,” explains Brown, “and it is ... 100-μm-thick aluminum oxide layer that is applied using a plasma spraying technique.

Explanation:

for this, you need the pythagorean theorem, which is a^{2}+ b^{2}= c^{2}

your a should be 12, and your b should be 35. so now you can solve for c, which equals 37 miles.

so the answer is 37 miles