Device for supplying voltage in a motor vehicle including two batteries and having improved reliability
First Claim
1. A device for supplying voltage in a motor vehicle, said device comprisingat least one generator (10,11) having a generator speed and including means for producing at least one generator-speed dependent output voltage;
- at least two batteries (25,27);
a plurality of electrical consumers (32a,32b,33,34);
an electrically powered starter (29);
a power control unit (14) for operating said at least one generator (10,11) without voltage regulation to produce the at least one-generator-speed dependent output voltage including controlled rectifier bridge means (16,17) connected to said at least one generator (10,11), a following intermediate voltage circuit (18,19) connected to said controlled rectifier bridge means (16,17), means (15) for controlling said at least one generator, said controlled rectifier bridge means and said intermediate voltage circuit and a plurality terminals by means of which the at least two batteries (25,27) are connected with the electrical consumers to supply the electrical consumers with electrical power and at least one of said at least two batteries is connected to the electrically powered starter to supply the starter (29) with electrical power during a starting process.
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Accused Products
Abstract
A device for supplying voltage in a motor vehicle is described in which there is at least one generator that can furnish an generator-speed-dependent output voltage without voltage regulation. The at least one generator is preferably a three-phase alternator with a plurality of stator windings whose electrical connections are switchable at predetermined generator speeds by a control unit to provide the generator-speed dependent output voltage. In a following power control unit, this generator speed-dependent voltage is rectified by means of at least one controlled rectifier bridge and via assigned voltage converters is converted into a plurality of directly voltages of different magnitude. These direct voltages are supplied to the individual on-board electrical system components via electronic vehicle body power control system units. By optimal-efficiency triggering of the controlled rectifier bridges and additional safety and/or emergency provisions, the functional capability and power capability of the voltage supply unit are assured.
46 Citations
8 Claims
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1. A device for supplying voltage in a motor vehicle, said device comprising
at least one generator (10,11) having a generator speed and including means for producing at least one generator-speed dependent output voltage; -
at least two batteries (25,27); a plurality of electrical consumers (32a,32b,33,34); an electrically powered starter (29); a power control unit (14) for operating said at least one generator (10,11) without voltage regulation to produce the at least one-generator-speed dependent output voltage including controlled rectifier bridge means (16,17) connected to said at least one generator (10,11), a following intermediate voltage circuit (18,19) connected to said controlled rectifier bridge means (16,17), means (15) for controlling said at least one generator, said controlled rectifier bridge means and said intermediate voltage circuit and a plurality terminals by means of which the at least two batteries (25,27) are connected with the electrical consumers to supply the electrical consumers with electrical power and at least one of said at least two batteries is connected to the electrically powered starter to supply the starter (29) with electrical power during a starting process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification