This document discusses replacing the universal motor currently used in residential mixers and grinders with a brushless DC (BLDC) motor to improve energy efficiency. Some key points: - BLDC motors are more efficient than universal motors due to electronic commutation and lack of brushes. They allow for easier speed control and produce less heat. - A BLDC motor was designed for a mixer/grinder with specifications like 60W power, 24V voltage, 3000 rpm speed. Speed can be varied using a potentiometer. - Tests show the universal motor in mixers has low efficiency around 50% due to high no-load power loss. Replacing it with a BLDC motor