Control device for battery charging AC generator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorMitsuharu Morishita
Life of this patent
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Abstract
An AC generator charges a storage battery through a full-wave rectifier. The battery energizes a field generator coil through an indication lamp and two Darlington-connected transistors in their conducting state due to a flow of base current through them via a base resistor connected to the battery until a voltage across the generator reaches a predetermined magnitude. At that time, a Zener diode conducts to turn the two transistors off. The field coil is also connected to an intermediate voltage rectifier output terminal to be energized with a voltage from that terminal even if the filament of the charge indicating lamp is broken.
Claims4
A device for charging a battery comprising, in combination:
- an AC generator having a field coil;
- a full-wave rectifier means connected to the AC output of said AC generator and including a first, a second and a third rectified output terminal, said full-wave rectifier means producing DC outputs between said first and third rectified output terminals and between said second and third rectified output terminals respectively;
- means for connecting a storage battery across said first and third rectified output terminals and including a lead connecting said first rectified output terminal to said storage battery;
- voltage regulator means operatively coupled to said AC generator for controlling the output voltage therefrom to a predetermined magnitude by sensing said output voltage and controlling the field current flowing through said field coil in response to the sensed voltage, said voltage regulator means having an output transistor means series connected to said field coil between said second and third rectified output terminals;
- a starting key switch and a charge indication lamp connected in series between said second rectified output terminal and said storage battery;
- and
- a base current-supply circuit for supplying a base current to said output transistor means and having a base resistor connected directly to said first rectified output terminal.
Dependencies are inferred from the claim text.