Vehicular direct-current three-wire electric system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMitsuharu Morishita, Mitsuyoshi Yokota, Akio Matsumoto
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Abstract
A vehicular charging and starting system is improved by providing first and second a.c. generators, rectifiers and voltage regulators, the negative terminal of the first rectifier and the positive terminal of the second rectifier being connected to a neutral or body grounded conductor. A pair of batteries are respectively positively and negatively connected to said neutral or grounded conductor. Protection circuits may be provided for overcurrent protection of the rectifiers or electrical loads, and for preventing the starter motor from rotating at an excessive speed once the engine is started.
Claims15
A direct-current three-wire electrical system for a vehicle, comprising:
- an alternating-current generator including first and second field coils magnetically separated from each other, a first armature coil facing said first field coil, a second armature coil facing a second field coil;
- a first rectifier for rectifying the a.c. output of the first armature coil;
- a second rectifier for rectifying the a.c. output of said second armature coil;
- a first storage battery connected between the plus and minus output terminals of said first rectifier;
- a second storage battery connected between the plus and minus output terminals of said second rectifier;
- a starting motor connected between the plus output terminal of said first rectifier and the minus output terminal of said second rectifier;
- a first voltage regulator for controlling the output voltage of said first armature coil to a first predetermined value by detecting the rectified output voltage between the plus and minus output terminals of said first rectifier to control the field current flowing in said first field coil;
- a second voltage regulator for controlling the output voltage of said second armature coil to a second predetermined value by detecting the rectified output voltage between the plus and minus output terminals of said second rectifier to control the field current flowing through said second field coil;
- a neutral conductor or a body grounded conductor connecting in common the minus output terminal of said first rectifier and the plus terminal of said second rectifier, and the minus terminal of said first storage battery and the plus terminal of said second storage battery;
- and switching means associated with said first and second storage batteries for connecting said first voltage regulator and said second voltage regulator in circuit with said first battery and said second battery, respectively.
Dependencies are inferred from the claim text.