DC – AC Motor Conversion

Thirty years ago, DC motors were the workhorse of industry when variable speed was required. These were found in many applications including mine winders, extrusion applications and the steel industry. However, they needed a maintenance schedule including regular brush changes and carbon removal from the windings. Every so often, a major overhaul was required in a workshop to skim the commutators. The DC motors also had inefficiencies with the brushgear and complicated winding arrangements. DC…