Slide 62 of 89
The Cray 1 had two of these motor-generators to generate the 3 phase 400 cycle power that was fed to the power supplies located around the base of the computer. Seymour claimed it was the world’s most expensive “love bench”.
The other unit was a large refrigeration unit that pumped Freon into the computer cold plates. Heat was transferred to chilled water that could be used to heat the building.