Review of sensorless methods for brushless DC

Comparison Analysis of Zeta PFC Converter to Improve Power Quality Improvement by PI Controller, Hysteresis Controller and Fuzzy Logic Controller for Speed Control of Induction Motor

“…[5] The effect of the above could make the stator currents exceed the rated modern-day by a huge quantity therefore endangering the inverter converter mixture. The demerits of open loop are to be suppress via having an outer loop inside the induction motor force, in which the actual rotor speed is as compared with its commanded fee, and the mistake is processed via a controller typically a PI controller and a limiter is used to achieve the slip-speed command [6] .A speed sensor or a shaft role encoder is used to acquire the real speed of the motor. It"s miles then as compared to a reference velocity.…”

Efficient Sensorless PMSM Drive for Electric Vehicle Traction Systems

“…Simple rotor position estimation can be obtained through direct digital signal processing of the Hall-effect sensor outputs (Johnson, et al, 1999;Morimoto et al, 1996). The electric angular position is generally given by:…”

“…The state estimation algorithms, such as a state observer or an extended Kalman filter, are also adopted to estimate the rotor position and the speed (Batzel & Lee, 2005). Other rotor position estimation techniques reported in (Carpaneto, et al, 2009;Cheng & Tzou, 2003;Johnson, et al, 1999;Sungyoon, et al, 2010;Yousfi, 2009) are based on the flux linkages, which can be obtained from the stator voltages and the currents of the motors. The flux linkage based methods operate accurately over a wide speed range and can be applied to the PM Brushless motors with either trapezoidal or sinusoidal Back-EMFs.…”

A Novel Sensorless Control Strategy for Brushless Direct Current Motor Based on the Estimation of Line Back Electro-Motive Force

“…Hall-effect sensors, electromagnetic variable reluctance sensors, and photoelectric sensors are generally employed to provide the accurate rotor position information for proper commutation of stator currents. However, the use of position sensors not only increases the motor's size and cost, but also limits the application of the motor where the reliability is of most importance [3][4][5][6]. Thus, the use of sensorless control techniques has emerged as required over time, and represents an important research direction with respect to BLDCM control.…”