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The paper deals with oscillating rotary electrical machines, that is with periodical angular movement of their movable part. Expedient application of all oscillating electrical machines consists in possible avoidance of mechanical transformer in the drive, according to the direct drive principle. That is why oscillating electrical machines are suitable to use with positive displacement thermal machines. In the paper, principles of development of the Stirling cycle heat pump with oscillating rotary electrical motors according to the project EFFiHEAT are presented. Partners from Spain, Bulgaria and Lithuania are implementing the project. Tentative test of the oscillating rotary motor prototype confirms its working capacity and advantages. Principles of presented structure can be used in various other devices of renewable energy (e. g. solar power stations, geothermal power plants, heat and power cogenerators, generators with multi-fuel Stirling engine etc.).

Oscillating rotary electrical machine for Stirling cycle heat pump and other devices of renewable energy