Dual voltage automotive on-board electrical network system
First Claim
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1. Dual voltage automotive on-board electrical network system havinga three-phase alternator (1);
- a main battery (4);
a main three-phase bridge rectifier (2) connected to the alternator (1) and supplying charging current from the alternator to the main battery;
an auxiliary battery (5);
an auxiliary two-phase bridge rectifier (3) supplying charging current from the alternator to the auxiliary battery (5);
mean (18a, 18b, 18c) connecting the output of the alternator (1) to the input of the main rectifier (2) and to the input of the input of the auxiliary rectifier (3) to supply power from the alternator to both said rectifiers;
a main load (12);
main switch means (11) selectively connecting said main load to main battery (4);
an auxiliary load (17) having a voltage rating which is the sum of the nominal battery voltages of both said batteries (4,
5);
and auxiliary switch means (13, 14,
16) connected for energization of said auxiliary load (17);
said auxiliary switch means (13, 14,
16) including a switching connection (15) serially connecting said batteries (4,
5) upon connection of said auxiliary load (17) for energization by said batteries (4,
5) in series.
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Abstract
To simplify connection of a starter motor to a 24V supply with a normal on-board network of 12V, an auxiliary rectifier and an auxiliary battery are connected in parallel to the output of an automotive alternator. The starter relay switch contacts are so arranged that, only upon operation of the starter switch, the two batteries are connected in series and then to the starter motor. The supply connections to the batteries are left undisturbed, feedback being prevented by the rectifiers which are connected to the output of the alternator.
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Citations
12 Claims
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1. Dual voltage automotive on-board electrical network system having
a three-phase alternator (1); -
a main battery (4); a main three-phase bridge rectifier (2) connected to the alternator (1) and supplying charging current from the alternator to the main battery; an auxiliary battery (5); an auxiliary two-phase bridge rectifier (3) supplying charging current from the alternator to the auxiliary battery (5); mean (18a, 18b, 18c) connecting the output of the alternator (1) to the input of the main rectifier (2) and to the input of the input of the auxiliary rectifier (3) to supply power from the alternator to both said rectifiers; a main load (12); main switch means (11) selectively connecting said main load to main battery (4); an auxiliary load (17) having a voltage rating which is the sum of the nominal battery voltages of both said batteries (4,
5);and auxiliary switch means (13, 14,
16) connected for energization of said auxiliary load (17);said auxiliary switch means (13, 14,
16) including a switching connection (15) serially connecting said batteries (4,
5) upon connection of said auxiliary load (17) for energization by said batteries (4,
5) in series. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Dual voltage automotive on-board electrical network system having
a three-phase alternator (1); -
a main battery (4); a main three-phase bridge rectifier (2) connected to the alternator and supplying charging current from the alternator to the main battery; an auxiliary battery (5); an auxiliary rectifier (3) supplying charging current from the alternator to the auxiliary battery (5), the auxiliary rectifier having a lesser current carrying capacity, or power rating, than the current carrying capacity, or power rating, of the main rectifier (2); means (18a, 18b, 18c) connecting the output of the alternator to the input of the main rectifier (2) and to the input of the auxiliary rectifier (3) to supply power from the alternator to said rectifiers (2,3); a main load (12); main switch means (11) selectively connecting said main load to main battery (4); an auxiliary load (17) having a voltage rating which is the sum of the nominal battery voltages of both said batteries (4,
5);and auxiliary switch means (13, 14,
16) connected for energization of said auxiliary load (17);said auxiliary switch means (13, 14,
16) including a switching connection (15) serially connecting said batteries (4,
5) upon connection of said auxiliary load (17) for energization by said batteries (4,
5) in series. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification