초록 ▼

A vehicular AC generator comprises a resistor for ground one-phase output terminal in an armature coil, a switch for connecting and disconnecting at least one-phase output terminal out of the other phases of the armature coil to and from the ground, and a control unit for controlling the switch. The

A vehicular AC generator comprises a resistor for ground one-phase output terminal in an armature coil, a switch for connecting and disconnecting at least one-phase output terminal out of the other phases of the armature coil to and from the ground, and a control unit for controlling the switch. The switch is controlled ON and OFF in accordance with a voltage generated across the resistor. According to this configuration, in the event of occurrence of leakage current in the armature coil, the occurrence of the leakage current is detected based on the voltage generated across the resistor and the switch is closed, whereby the leakage current is allowed to escape to ground and an actual signal from the resistor is detected easily.

대표청구항 ▼

1. A vehicular AC generator comprising:a rotor including a plurality of field poles; a field coil for magnetizing said field poles; a diode connected in parallel with said field coil for returning an exciting current; an armature having an armature core provided with a multi-phase coil, said multi-p

1. A vehicular AC generator comprising:a rotor including a plurality of field poles; a field coil for magnetizing said field poles; a diode connected in parallel with said field coil for returning an exciting current; an armature having an armature core provided with a multi-phase coil, said multi-phase coil inducing an AC voltage by receiving a rotating magnetic field generated by said rotor; an output voltage control unit controlling an electric current flowing through said field coil to control an output voltage of said vehicular AC generator; a resistor connected between one-phase output terminal of said multi-phase coil and a negative pole potential of a vehicular battery; and switch means for connecting and disconnecting at least one of remaining-phase output terminal of said multi-phase coil to and from the negative pole potential of said vehicular battery, wherein said output voltage control unit includes means for detecting a voltage generated across said resistor, and intermittently controls said switch means in accordance with the voltage generated across said resistor, and said output voltage control unit opens said switch means when a number of rotations of said rotor exceeds a predetermined number of rotations.