Here are some answers to frequently asked questions about motor control. Motors provide the driving power in almost every stage of the manufacturing and production process. With this much productive ...

This is the second half of a two-part article discussing principles and application of the AC induction motors that provide motive power for most of the equipment HVACR engineers specify. In March, we ...

Full-voltage, single-speed motor starters: Single-speed squirrel-cage motors have starters that fall into two categories: full-voltage or across-the-line starters; and reduced-voltage starters.

Our objective in specifying motors for HVACR equipment is to start and run the driven equipment under all operating conditions reliably and with reasonable life expectancy. The manufacturer of the ...

This article was updated May 15, 2023. It was originally published July 14, 2020. It often takes a lot of energy to get a motor up to speed. Across-the-line starters (DOL), the most common starter ...