in the next step of the cycle, the compressed and preheated air is fed to a combustor where it is mixed with the fuel and hence burned. this combustion process releases energy in the form of heat. the heated combustion exhaust gases are expanded through a gas turbine to drive the rotation of the central shaft and its attached compressor and permanent magnet generator. since the turbine, compressor and generator are mounted on a single rotating shaft, they rotate at the same speed to produce electrical power while continuously drawing in air to maintain the overall process. the faster the shaft spins in the magnetic field, the more electrical output is achieved by the generator. output power conditioning is obtained using inverter based power electronics.