Reduction of quadrature armature reaction in salient-pole synchronous generator by rotor flux barrier

The article delves into the critical role of synchronous generators in power generation and examines the importance of reducing armature reaction in salient-pole synchronous generators. It explores two main approaches to reduce armature reaction reactance: altering magnetic reluctance and reducing reactive magnetization. The use of flux barriers to the excitation is highlighted as a typical method to achieve this. The study focuses on the theoretical analysis and experimental verification of the impact of flux barriers on synchronous reactances and armature reaction fields in a 50 kVA, 4-pole salient-pole synchronous generator without damper windings. The results show a significant reduction in quadrature axis synchronous reactance (Xq) and a minor change in direct axis synchronous reactance (Xd), demonstrating the potential to enhance the operating performance and torque relationship of electric machines. The work concludes with a discussion on the mechanical considerations and future research directions for optimizing the design and operation of such generators.