The direct-drive sensorless generation system for wave energy utilization

• A direct wave energy extraction power generation system based on the linear switched reluctance generator.
• A sensorless position estimation scheme integrated the LSRG based generation system.
• Performance analysis and parameters optimization for the LSRG based, sensorless power generation system.

A direct-drive generator based on linear switched reluctance principle is investigated for wave energy utilization. Integrated with the sensorless technique, the direct-drive generator has the characteristics of low cost and robustness, and the power generation control system is especially suitable for the operation under hostile working environments since restrictions of physical sensors are eliminated. Simulation analysis based on the finite element methods (FEM) and joint simulation are carried out for performance analysis of the power generation control system, including position estimation, open loop turn-on and turn-off position optimization and closed loop current regulation. Experimental results validate the effectiveness of the position estimation scheme for the sensorless, linear switched reluctance generator based power generation control system.