Design and analysis of novel Dual-Mover Fault-Tolerant PM linear vernier generator for wave energy conversion system

Purpose The purpose of this paper is to present the design and analysis of a dual-mover fault-tolerant permanent magnet linear Vernier generator (PMLVG) for wave energy conversion systems. The paper aims to address the growing need for reliable and sustainable marine energy solutions by developing a generator capable of continuous energy generation under both ideal and faulty conditions, including single-phase and two-phase electrical faults. Design/methodology/approach The proposed PMLVG is modeled and analyzed using finite element analysis (FEA) to evaluate its electromagnetic behavior, analyze performance parameters and ensure fault-tolerant operation. Detailed simulations under normal and fault scenarios are conducted to evaluate the mechanical power, efficiency and thrust force characteristics of the proposed generator. Findings Under ideal conditions, the generator achieves 18.9 kW of mechanical power with an efficiency of 92.5% and a rated thrust force of 101, 160 N. During a single-phase fault, the generator maintains 14.68 kW power output with 96.3% efficiency, while under a two-phase fault, it delivers 3.42 kW power with 97% efficiency, demonstrating robust fault-tolerant capabilities. The improved efficiency under fault situations is primarily attributed to reduced copper losses at lower loads. Originality/value In the present research, a novel PMLVG topology with improved fault-tolerant characteristics has been presented for wave energy conversion systems. According to the research results, it is feasible for sustainable wave power generation because its design achieves high efficiency and reliable operation regardless of the presence of severe fault conditions.