A CHOPPER-CONTROLLED SRM DRIVE FOR REDUCED ACOUSTIC NOISE AND IMPROVED RIDE-THROUGH CAPABILITY USING SUPERCAPACITORS

One of the problems with the SRM is its higher acoustic noise when com pared to an induction motor of the same size, Another problem of incre asing concern for all drives is the ability to ride-through dips or sh ort duration power outages of several cycles. In this paper, a chopper controlled SRM drive is presented with the aim of reducing the acoust ic noise as well as improving its ride-through capability. Supercapaci tors are used in the power supplies of the driver and logic circuits t o increase their duration of operation in the absence of mains power, Practical measurements of the reduced noise as well as the improved ri de-through capability are included.