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  BY    AFZAL YOUSAF Brushless DC Motor (BLDC)  is widely used in Electric vehicles like E-bikes, E-rickshaws, small electric loading vehicles etc and is more popular among EV enthusiasts and designers. BLDC is a successor of brushed DC Motor and it uses Hall sensors instead of brushes to control the drive signals. Brushless motors have improved efficiency and reliability than brushed ones.  Also it produce large amount of torque and a wide speed range. But some BLDC Motors do not have sensors. They are called Sensorless BLDC Motors.  In this article, you can read about the technology and working of Sensorless BLDC Motors. In Sensorless BLDC Motor, Instead of using Hall effect sensors to determine position or speed of rotor, we are using the phenomena of Back EMF. This sensorless BLDC Motor is also called sensorless trapezoidal controlled BLDC as voltage waveforms of these have a trapezoidal shape. In this sensorless technology, Back EMF is used to determin...

BY    AFZAL YOUSAF   Brushless DC Motor (BLDC) is mostly used in Electric vehicles like E-bikes, E-rickshaws, small electric loading vehicles etc and is more popular among EV enthusiasts and designers. Popularity of BLDC motor is because of its exciting properties that makes it suitable and significant contributor of modern drive technology. In this article you can get an overview of BLDC Motor, construction, electronic position sensors , BLDC working and Advantages. Rapid gain in popularity has seen in BLDC motor due to its properties like High efficiency, Better speed vs torque characteristics, less weight, low cost, simple construction, reliable and easily availability . All these properties are due to modern power electronics and advancement in Microprocessor technology that helped to thrive BLDC Motor. BLDC Motor as name suggests they are brushless and communicated via electronically. In conventional DC Motors, brushes are used to transmit the power to the rotor wh...