Abstract: A rectifier assembly is installed in an alternating current generator for providing D.C. current. The rectifier assembly includes a positive and negative cooling fin on which positive and negative diodes are respectively fixed, and interconnecting leads for respectively connecting each of the positive diodes with each of the negative diodes, wherein at least one of the interconnecting leads is disposed in slots of the stator core of the generator, whereby the interconnecting leads become resistant to line-failure or the like due to violent vibration.

Abstract: There is provided a vehicle engine-driven alternator wherein an internal combustion engine is coarsely adjusted to a preset speed by an engine governor, the turning driving force of the engine is transmitted to an alternator through a magnetic slip coupling, and the excitation current to the magnetic slip coupling is controlled by an excitation control circuit which compares the number of revolutions of the alternator with a preset value to generate an output depending on the result of the comparison, thereby providing a source of alternating current having an extremely accurate preset frequency.