Effect of voltage sag on ageing of front end rectifier diodes of ASD

Adjustable-speed drives are the type of equipment most sensitive to voltage sags. This paper analyzes the behaviour of front end rectifier of three-phase ac adjustable-speed drives during balanced and unbalanced sags. Emphasis is placed on the i2t rating of diode assuming that the drive will not trip. By using a previously introduced classification of three… CONTINUE READING