Rectified a-c systems are better, more reliable automotive power supply systems than the traditional d-c generators. Requirements today are for sealed bearings, slip ring and brush assemblies in sealed or dust-proof compartments, mounting interchangeability, and control units that prevent thermal runaway and high transient voltages. Three systems are discussed: a 40, 60, and a 100 amp system. Selection of a system should be based on an engineered analysis.
