Improved Speed Range Brushless DC Motors: A Low-Cost Sensorless Control

Inexpensive brushless DC motor control without a position sensor is suggested in this study. The motor's rotor position may be calculated by measuring the back EMF from just one of the three terminals. An Affordable Sensor-Less Control Using Brushless DC Motors with Expanded Speed Range. In light of where the terminal voltage is measured, a low-pass or bandpass filter can be utilized, which significantly reduces the number of components required for sensing. Cost for speed control can be further decreased by integrating the sensor circuit with a digital signal processor or microprocessor. The use of a look-up-table-based correction ensures precise position recognition, especially at slow speeds. This method broadens the working enhances motor effectiveness and speed range. The outcomes of the experiments validate the efficacy of the suggested strategy.