Design and development of sensorless controller for DC-operated mixer-grinder

Abstract

DC distribution system with DC appliances offer more efficient use of limited energy resources. A BLDC mixer-grinder is a promising alternative to the presently used inefficient mixer-grinders. This work presents a simple, low-cost control strategy for a DC-operated mixer-grinder with three-phase BLDC motor. A compact BLDC motor-controller is designed and developed. The mixer-grinder having variable starting load is successfully tested at rated load with sensorless and sensor-based control strategies and the hardware results are presented. Suitable modifications are introduced in the currently available sensorless algorithms, enabling the low-cost, sensorless operation of the mixer-grinder with variable starting loads.