Sensorless Control of BLDC Motor using Flux Linkage Based Algorithm
Rajesh Nalli1, K.Subbarao2, M.Ramamoorthy3, M.Kiran kumar4
1Rajesh Nalli, Research Scholar, Department of Electrical and Electronics Engineering, Koneru Lakshmaiah Education Foundation Guntur, India.
2K.Subbarao, Prof. Department of Electrical and Electronics Engineering, Koneru Lakshmaiah Education Foundation Guntur, India.
3M.Ramamoorty, Former Chancellor, Koneru Lakshmaiah Education Foundation Guntur, India.
4M. Kiran Kumar, Asso. Prof. Department of Electrical and Electronics Engineering, Koneru Lakshmaiah Education Foundation Guntur, India.
Manuscript received on July 20, 2019. | Revised Manuscript received on August 10, 2019. | Manuscript published on August 30, 2019. | PP: 1549-1556 | Volume-8 Issue-6, August 2019. | Retrieval Number: F8158088619/2019©BEIESP | DOI: 10.35940/ijeat.F8158.088619
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The performance of Conventional sensorless back-emf detection techniques for BLDC Motor is poor at low speeds, since at zero and low speeds the magnitude of back-emf is very less. This causes failure of zero crossing instant detection. This paper presents a new Sensorless Control Technique for BLDC motor drive to estimate the rotor position accurately even at zero and low speeds. A new algorithm has been developed to estimate the rotor position based on the prediction of stator flux linkages. The main advantage of the proposed technique is that the flux linkages are independent of the speed. For starting of the motor an open loop starting method was adopted. By implementing this technique the Meta heuristic digital signal control systems like PWM/ADC, PLL are avoided in order to make motor control easy and economical. To verify the accuracy of the proposed technique it is compared with existing hall sensors controlled BLDC drive operation. The validity of proposed scheme is verified through Simulation.
Keywords: Sensorless Technique – BLDC Motor – Hall Effect Sensors – Shaft Encoders – Fluxlinkage Algorithem.