Position Sensorless Control of Switched Reluctance Generator Using State Observer

This study focuses on the position sensorless control method for Switched Reluctance Generators (SRG) using a state observer. SRG is being considered as a cost-effective alternative to permanent magnet synchronous generators, particularly in renewable energy applications such as hydroelectric power generation. Accurate rotor position control is required for SRG, and traditionally, position sensors have been used to achieve this. However, the use of sensors increases costs and reduces durability in outdoor environments. This study proposes a sensorless control method that estimates the rotor position based on electrical signals using a state observer, eliminating the need for physical sensors. A linear state observer model for SRG was constructed, and its performance was verified through simulations under both low-speed and high-speed operating conditions. The simulation results demonstrated that the proposed method could accurately estimate the rotor position with minimal error. This study contributes to cost reduction and improved reliability of SRG in the field of renewable energy.