Abstract: A control apparatus for a charging generator capable of detecting a non-generating state, an uncontrolled state, and a state in which there is a break in connection at the primary output terminal of the generator. A bridge rectifier coupled to the outputs of the armature winding of the charging generator provides the output voltage on first and second output terminals. A voltage regulator controls the amount of current flow in the field coil of the generator in response to the voltage produced on the first output terminal. A diagnostic circuit detects conditions of the non-generating state, the uncontrolled state, and a break in connection at the first output terminal, while a start-up detecting circuit detects the start-up condition of the generator.

Abstract: A switching element is connected between the connection point of an indicator lamp and a diode and ground and is turned on to allow battery current to pass through the lamp to light the same when it is detected that a rectifier output terminal has fallen to a voltage indicative of the lack of generator output, to thereby indicate a failure or open circuit in a coil energization circuit.

Abstract: A vehicular generator with at least one cooling fan, wherein a plurality of blades of the cooling fan are made of a shape memorizing alloy, whereby, especially in medium and high revolution speed operations and low electric loads in which cooling air is not required, the blades are flattened, thereby preventing the rotational efficiency of the generator from falling and reducing noise ascribable to the cooling fan.