Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
  • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
  • H02J7/1469—Regulation of the charging current or voltage otherwise than by variation of field
  • H02J7/1492—Regulation of the charging current or voltage otherwise than by variation of field by means of controlling devices between the generator output and the battery
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
  • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Definitions

• the invention relates to a device for power supply for a motor vehicle electrical system according to the preamble of the main claim.
• devices for voltage supply which contain a permanent magnet-excited generator as a generator
• the voltage regulation can take place in different ways.
• One possibility is to provide a series regulator with a main current switch in the series branch, a further possibility is cross-regulation with a main current switch in the cross branch.
• the combination of both control types is also possible.
• voltage peaks can lead to the destruction of sensitive components, in particular in the case in which the system is operated without a battery.
• a battery charging system with a permanently excited generator is known, with a voltage regulator, which comprises a zener diode for voltage limitation, which is connected between the generator output and ground, and the voltage peaks, which can occur in particular in operation without a battery , leads away.
• a voltage regulator which comprises a zener diode for voltage limitation, which is connected between the generator output and ground, and the voltage peaks, which can occur in particular in operation without a battery , leads away.
• the known battery charging system has the disadvantage that the rectifier elements of the three-phase bridge are not controlled.
• Such controlled three-phase bridges are also known in connection with a permanent magnet-excited generator and a voltage regulator, for example from DE-OS 30 09 278, but this known circuit arrangement has no zener diode for overvoltage protection and is therefore not suitable for operation without a bat ⁇ suitable.
• the regulator is not supplied with voltage by the generator when the rectifier elements of the controlled three-phase current bridges are blocked, so that the voltage regulator would no longer be supplied with voltage when operating without battery.
• the device according to the invention for the voltage supply for a motor vehicle electrical system with the characterizing features of the main claim and the subsidiary claims has the advantage over the known that the voltage regulator is supplied with voltage directly from the generator even with blocked power semiconductors of the rectifier bridge by means of an auxiliary diode trio, and thus remains supplied with voltage even after the battery connection has been opened (intentionally or as a result of a line break). Operation of the controller and thus control of the three-phase current bridge and the supply of the vehicle electrical system is therefore also possible without a battery.
• the figure shows a permanently excited three-phase generator 11, which is followed by a semi-controlled rectifier bridge 12.
• the output power is available at generator output 13 for the subsequent electrical system.
• a voltage regulator 15 is connected, which is connected to the controllable rectifier elements, for example semiconductor elements 16, 17 and 18 of the rectifier bridge 12, which also includes the rectifier elements 19, 20, 21 and also via three Additional diodes 22, 23 and 24 are connected to the rectifier bridge and one of the three phase windings of the generator 11.
• a parallel circuit consisting of a zener diode 25, usually a power zener diode, possibly a battery 26 and various consumers 27, 28, is connected between the generator output 13 and ground 14.
• Switches 29, 30 and 31 are connected in series to the battery 26 and the consumers 27 and 28, respectively.
• An additional choke 33 can be connected between the connection point 32 of the Zener diode 25 with the generator output 13 and the switches 29, 30, 31.
• the rectifier elements 16, 17 and 18 of the rectifier bridge 12 are designed as thyristors in the exemplary embodiment, the rectifier elements 19, 20, 21 are diodes in the exemplary embodiment. However, it is also possible to also design the rectifier elements 19, 20 and 21 as thyristors and to connect them to the voltage regulator in accordance with thyristors 16, 17 and 18 and thus to obtain a fully controlled rectifier bridge.
• the auxiliary diodes 22, 23 and 24 can also be designed as Zener diodes.
• Zener diode 25 instead of the Zener diode 25, another device for overvoltage protection can also be provided.
• the current supplied by the permanent field generator is rectified via the semi-controlled rectifier bridge 12 and released into the network.
• the voltage regulator 15 ensures that the output voltage of the generator is kept constant regardless of the operating conditions of the generator.
• the thyristors 16, 17 and 18 are blocked when the voltage at terminal 13 rises above a predetermined value and made conductive when the voltage at DC output 13 falls below a predetermined value.
• the thyristors are controlled by the voltage regulator according to a phase control control known per se or according to the likewise known pulse packet method.
• the three auxiliary diodes 22, 23 and 24 and the power zener diode 25 enable battery-free operation of the motor vehicle.
• the power zener diode 25 protects the vehicle electrical system against brief voltage peaks until the controller intervenes and blocks the power semiconductors.
• the power zener diode 25 acts as a freewheeling diode for the on-board electrical system in the case of battery-free operation.
• the voltage regulator 15 receives the voltage directly from the generator via the three auxiliary diodes 22, 23 and 24. This enables battery-free operation of the device for the voltage supply, since even after the power semiconductors 16, 17 and 18 have been blocked, the rectifier bridge can be controlled via the voltage regulator, and thus the supply of the on-board electrical system can be made possible.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Control Of Eletrric Generators (AREA)
• Control Of Charge By Means Of Generators (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6368861

Family Applications (1)

Country Status (4)

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Family Cites Families (3)

• 1988
  • 1988-12-10 DE DE3841610A patent/DE3841610A1/de not_active Withdrawn
• 1989
  • 1989-09-20 EP EP19890910067 patent/EP0416043A1/de not_active Ceased
  • 1989-09-20 WO PCT/DE1989/000597 patent/WO1990006616A1/de not_active Application Discontinuation
  • 1989-09-20 JP JP1509298A patent/JPH03502516A/ja active Pending

Non-Patent Citations (1)

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