MIXED GENERATOR-RECTIFIER POWER FOR JET (A Manufacturers View)

JET needs Peak Power approaching 700 MW d.c. probably from a mixture of Flywheel-Generators and a Power System. Generators can be High-Speed type with separate flywheels or Low Speed, vertical shaft, water-wheel type. The Toroidal Field requires a Generator, and diode rectifiers, in series with a diode-thyristor unit supplied from the a.c. System. The Poloidal Field can be supplied from a Generator via Thyristor rectifiers with current reversal by circuit-breakers or anti-parallel thyristors. Low Speed Generators are preferable. They operate below any critical speed, and can be shut down quickly. Main Power Rectifiers are liquid-cooled, similar to those used by industry.