Motor vehicle power supply, associated operating method and means for its implementation

一种车载电源、机动车辆的技术，应用在紧急保护电路装置、输出功率的转换装置、电气元件等方向，能够解决损伤部件、电压骤降、快速电流改变等问题

Active Publication Date: 2014-11-26
SEG AUTOMOTIVE GERMANY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, multiple clocking of the actuation signal within a half-wave has disadvantages, in particular because rapid current changes occur when the corresponding phase short-circuit is initiated and canceled.
This can cause voltage dips or voltage spikes in combination with existing power inductors
Especially the latter may damage parts

Method used

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  • Motor vehicle power supply, associated operating method and means for its implementation
  • Motor vehicle power supply, associated operating method and means for its implementation
  • Motor vehicle power supply, associated operating method and means for its implementation

Examples

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Embodiment Construction

[0037] Figures 1A to 1C A device with an active bridge rectifier and its function is shown schematically.

[0038] exist Figure 1A In , a conventional arrangement with a bridge rectifier 1 and a generator 2 is schematically shown taking a three-phase system as an example. Bridge rectifier 1 in Figure 1A is shown as a six-pulse bridge rectifier, which is set up to rectify the alternating current of the three-phase generator 2 . However, it is also possible, for example, to use a four-phase, five-phase, six-phase or seven-phase generator 2 and a correspondingly adapted bridge rectifier 1 . Figure 1B and 1C For example, an arrangement with a five-phase generator 2 and a corresponding bridge rectifier 1 is shown.

[0039] The bridge rectifier 1 has three half-bridges U, V and W, which are connected via inputs u, v and w to the corresponding output of the generator 2 and thus to the corresponding generator winding.

[0040] The half-bridges U, V and W are connected on the ...

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Abstract

Provided are a motor vehicle power supply, an associated operating method and a means for its implementation. The vehicle power supply includes: an active bridge rectifier which is connected to a generator via multiple phase terminals, and having terminals on the direct voltage side; a unit for recognizing load shedding at the active bridge rectifier and short-circuiting the phase terminals in a clocked manner, as the result of which a pulsed current is fed to the vehicle electrical system; a vehicle power supply capacitor configured for smoothing the pulsed current; and a voltage limiting unit configured for clipping a voltage between the terminals of the bridge rectifier on the direct voltage side to a predefined maximum voltage. The corresponding operating method and the means for its implementation are also subjects of the invention.

Description

technical field [0001] The invention relates to an on-board power supply for a motor vehicle with an active bridge rectifier, a device for protection against damage from overvoltage when the load drops, as well as a related operating method and a device for implementing the operating method. Background technique [0002] To feed a DC system from a three-phase current system, rectifiers of different construction types can be used. Here, the application relates to an active (controlled) bridge rectifier having active switching elements, for example in the form of known MOS field effect transistors. In the on-board power supply of motor vehicles, bridge rectifiers of six-pulse design are frequently used in order to adapt to the three-phase current generators usually installed there. However, the invention is equally suitable for bridge rectifiers for other phase numbers, for example for five-phase generators, and for use in other application scenarios. [0003] As explained f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219H02M1/32
CPCH02M1/32H02H7/1252H02M7/2173H02M7/219H02M7/2195
Inventor P.梅林格
Owner SEG AUTOMOTIVE GERMANY GMBH
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