Variable Frequency Drive for a larger factory fan

[chy_farm]

A couple of logic units of this type is known as noise-fragile to electro-magnetic noises. This part was one of the complexities to me.


Units in the right half (marked yellow) are electrically shielded with copper plate around them, they are a triangle wave generator and a wave form comparator, and a sine wave generator.

These in the left half are also shielded with so called shield wire (black wires), they make up a Pulse Width Modulation logic unit.

Chy