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/R and Mechanical 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