Variable Frequency Drives

They wanted a sales sheet, but a sales sheet wouldn’t have solved the underlying problem — when technical people talked about VFDs, they made the benefit of the product unintelligible, even to other technically-minded people. After all, pulse-width modulation is only interesting to a very small subset of the population. So we created a way to explain the benefit in a metaphor that anyone could understand without having to think about it very hard.