Title :
Using corona inception voltage for motor evaluation
Author_Institution :
Lincoln Electr. Co., Cleveland, OH, USA
Abstract :
Failures of the interturn insulation system of induction motors fed by PWM variable speed controllers have plagued the industry since the introduction of fast-switching, IGBT-based drives. The majority of these failures are attributed to high voltage stresses imposed upon the motor by the drive. Here, the author describes how the corona inception voltage can be used for evaluating the state of variable speed induction motor drive insulation
Keywords :
DC-AC power convertors; PWM invertors; corona; induction motor drives; insulation testing; machine insulation; machine testing; variable speed drives; PWM IGBT invertors; corona inception voltage; high voltage stresses; insulation breakdown testing; insulation evaluation; interturn insulation failures; variable speed induction motor drive; Control systems; Corona; Electrical equipment industry; Induction motors; Industrial control; Insulated gate bipolar transistors; Insulation; Pulse width modulation; Stress; Voltage;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/2943.771366
