Abstract
This paper provides an overview of methods for the calculation and design of linear electric generators with permanent magnets for a single-stage thermoacoustic engine operating on the Stirling heat cycle. The proposed methodologies are grouped based on the type of approach used for the calculation. A detailed analysis of the proposed methods and assumptions is conducted, and conclusions are made regarding their feasibility for the design of electric generators with permanent magnets and solid magnetic core elements. The primary assumptions are related to the representation of parameters in the equivalent circuit of the magnetic systems. It is established that the majority of the methodologies do not account for the influence of eddy currents in the solid elements of the magnetic core. It is demonstrated that many approaches aimed at designing electric machines with permanent magnets can be adapted to linear electric generators. The designed linear generator is intended for use in a thermoacoustic device (TAD). The development of the TAD utilized well-established theoretical and practical advancements in the field of thermoacoustics. Several laboratory prototypes were also developed to refine the energy source, which will serve as the foundation for a cogeneration thermal power plant of ultra-low capacity. This power plant will comprehensively produce both electrical and thermal energy for autonomous consumers. Keywords: linear generator, reciprocating motion, Stirling, permanent magnet generator, magnetic core, coil