Larry Gardner


Motors and Drives January 7, 2021

How to choose between an ECM and a VFD

While each has its place in HVAC applications, electronically commutated motors and variable frequency drives have important differences in simplicity, flexibility, cost and other factors

By Larry Gardner
HVAC December 19, 2018

Your questions answered: Curbing VFD harmonics in HVAC applications

Explore HVAC applications for VFDs, VFD design differences and performance factors, harmonic mitigation methods, and the basics of IEEE 519.

By Larry Gardner