Save pump motors from VFD-induced damage

摘要

For six years, Scott Wilkins, manager of motor shop operations at Independent Electric Machinery Co. (IEMCO) in Kansas City, Kan., has overseen the reconditioning of hundreds of vertical hollow-shaft motors through a process known as the Vertical Motor Solution. After replacing the bearings, his team installs a shaft grounding ring next to the motor's guide (lower) bearing and applies ceramic insulation to the carrier that holds the thrust (upper) bearing in place at the motor's drive end. Wilkins has not heard of a single motor that has failed since receiving this treatment.