• Ponnada Devendra Naidu
• Dr. Mallikarjuna Rao Pasumarthi

In this paper, the research investigates the implementation of sensorless control in a Lopifit treadmill bicycle, employing a Back EMF observer for precise control of a Brushless Direct Current (BLDC) motor. By eliminating the need for external sensors, this study aims to enhance the efficiency and reduce the complexity of the motor control system. The Back EMF observer estimation method is applied and evaluated, showcasing its effectiveness in achieving reliable and cost-effective motor control within the Lopifit platform. The Back EMF observer, a key component of this approach, estimates critical motor parameters such as rotor position and speed. It is possible to determine the position of the rotor using the proposed method, which models a trapezoidal back-EMF as an input and proposes a Back EMF observer that estimates a line-to-line back-EMF in real time. The fact that the information about a rotor position is calculated independently of the rotor speed without the use of an additional circuit or a laborious operation procedure is one particular way in which this observer performs well at low speeds. The proposed control scheme has been verified through simulations and experiments. The findings highlight the significance of sensorless control in enhancing the performance and accessibility of electric-powered transportation devices like the Lopifit treadmill bicycle.

BLDC Motor, back – EMF Observer, Sensorless control, Rotor position, Rotor speed, Lopifit treadmill bicycle.

"Sensorless Control of BLDC Motor in Lopifit Treadmill Bicycle using Back EMF Observer Estimation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 10, page no.b176-b182, October-2023, Available :http://www.jetir.org/papers/JETIR2310117.pdf

"Sensorless Control of BLDC Motor in Lopifit Treadmill Bicycle using Back EMF Observer Estimation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 10, page no. ppb176-b182, October-2023, Available at : http://www.jetir.org/papers/JETIR2310117.pdf