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US 7,679,219 B2Granted
Power supply device
AssigneeRobert Bosch GmbH
InventorsHerbert Labitzke, Andre Micko
Life of this patent
Estimating the term…
Abstract
Power supply devices for vehicle electrical systems in particular, including two voltage systems, i.e., vehicle electrical systems, each having its own generator. The first generator and the battery belong to the same voltage system, and the second generator belongs to the second voltage system. If the two voltage systems were decoupled, the second generator would not have the excitation current required for starting, so means are consequently provided here to connect the second generator to a charge storage device after actuation of the ignition switch, thereby generating an excitation current; this charge storage device may also be the battery of the first voltage system and the connection is kept conductive until the second generator starts and is generating an output voltage.
Claims16
A power supply device comprising:
- a first voltage system including at least one first generator, to which a first voltage regulator is assigned;
- a charge storage device connected to the first generator and consumers switchable to the charge storage device via an ignition switch;
- a second voltage system including at least one second generator, to which a second voltage regulator is assigned as well as switchable consumers the second voltage regulator regulating an excitation current flowing through an excitation winding of the second generator;
- and
- at least one connecting device situated between the excitation winding of the second generator and the charge storage device for connecting the excitation winding of the second generator to the charge storage device for generating the excitation current in the excitation winding of the second generator, wherein the connecting device includes a bidirectional d.c./d.c. voltage transformer.
2 more elements
A power supply device comprising:
- a first voltage system including at least one first generator, to which a first voltage regulator is assigned;
- a charge storage device connected to the first generator and consumers switchable to the charge storage device via an ignition switch;
- a second voltage system including at least one second generator, to which a second voltage regulator is assigned as well as switchable consumers the second voltage regulator regulating an excitation current flowing through an excitation winding of the second generator;
- and
- at least one connecting device situated between the excitation winding of the second generator and the charge storage device for connecting the excitation winding of the second generator to the charge storage device for generating the excitation current in the excitation winding of the second generator, wherein the connecting device includes at least one diode and a resistor, an anode of the diode being connected to the charge storage device and a cathode being connected to the excitation winding of the second generator.
2 more elements
A power supply device comprising:
- a first voltage system including at least one first generator, to which a first voltage regulator is assigned;
- a first charge storage device connected to the first generator and consumers switchable to the battery via an ignition switch;
- a second voltage system including at least one second generator, to which a second voltage regulator is assigned, as well as switchable consumers, the second voltage regulator regulating an excitation current flowing through an excitation winding of the second generator;
- a second charge storage device connectable to the excitation winding of the second generator, the second charge storage device being one of a battery, a capacitor and a SuperCap;
- and
- at least one connecting arrangement for connecting the excitation winding of the second generator to the second charge storage device for generating the excitation current in the excitation winding of the second generator, the connection being established after actuation of the ignition switch and maintained until the second generator has started and is supplying an output voltage.
3 more elements
A method for power supply in a power supply device, the power supply device including:
- a first voltage system including at least one first voltage generator, to which a first voltage regulator is assigned;
- a charge storage device connected to the first generator, consumers switchable to the charge storage device via an ignition switch;
- a second voltage system including at least one second generator, to which a second voltage generator is assigned, as well as switchable consumers, the second voltage regulator regulating an excitation current flowing through an excitation winding of the second generator;
- and at least one connecting device situated between the excitation winding of the second generator and the charge storage device for connecting the excitation winding of the second generator to the charge storage device, the at least one connecting device including at least one diode and a resistor, an anode of the diode being connected to the charge storage device and a cathode being connected to the excitation winding of the second generator, the method comprising:
- establishing a connection of the second voltage system to the first voltage system via the diode and resistor;
- and
- terminating the connection when a voltage of the second generator exceeds a voltage of the first generator.
4 more elements
A method for power supply in a power supply device, the power supply device including:
- a first voltage system including at least one first voltage generator, to which a first voltage regulator is assigned;
- a charge storage device connected to the first generator, consumers switchable to the charge storage device via an ignition switch;
- a second voltage system including at least one second generator, to which a second voltage generator is assigned, as well as switchable consumers, the second voltage regulator regulating an excitation current flowing through an excitation winding of the second generator;
- and at least one connecting device situated between the excitation winding of the second generator and the charge storage device for connecting the excitation winding of the second generator to the charge storage device, the at least one connecting device including a bidirectional d.c./d.c. voltage transformer, the method comprising:
- supplying an excitation current to the second generator from the charge storage device via the connecting device.
2 more elements
Dependencies are inferred from the claim text.