Two-speed asynchronous electric drive with energy-saving steps
Abstract
Based on the combination of two well-known circuits of the pole-switched stator winding of a two-speed asynchronous electric motor, a new scheme has been obtained, which, in addition to the two main speed stages, allows to have two more energy-saving stages at the same speeds. It is recommended to increase cos and reduce losses in electric drives with two-speed engines, operating under conditions of load fluctuations and a significant proportion of periods close to idling.