Identify defects in the function of at least one active switching element of an active bridge rectifier

A technology of bridge rectifier and active switch, which is applied in the direction of electrical components, output power conversion devices, AC power input conversion to DC power output, etc., which can solve problems such as high temperature and reduced efficiency, and achieve load reduction, Avoid the effect of the vehicle operating point

Active Publication Date: 2019-12-03
SEG AUTOMOTIVE GERMANY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, higher temperatures occur in the bridge rectifier due to the increased forward voltage at the switching elements
In addition, the efficiency decreases

Method used

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  • Identify defects in the function of at least one active switching element of an active bridge rectifier
  • Identify defects in the function of at least one active switching element of an active bridge rectifier
  • Identify defects in the function of at least one active switching element of an active bridge rectifier

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Experimental program
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Embodiment Construction

[0037] exist figure 1 A device with generators 20 , 30 , bridge rectifier 40 and control device 50 is schematically shown in FIG. 3 using the example of a three-phase system. The described arrangement is part of the on-board electrical system 10 of the motor vehicle, which is only partially shown here.

[0038]The generator 20, 30 comprises a generator regulator 20 with terminals 21a, 21b and 21c, a field coil 22 and a communication line COM and a stator with three stator windings 32 interconnected in a delta circuit at switching points 31a, 31b and 31c 30.

[0039] bridge rectifier 40 in figure 1 is shown as a six-pulse bridge rectifier 40 which is provided for rectifying the rotating current of the three-phase generator 20 , 30 . In the same way, however, it is also possible, for example, to use four-phase, five-phase, six-phase or seven-phase generators 20 , 30 and to use correspondingly adapted eight-pulse, twelve-pulse or fourteen-pulse bridge generators. Rectifier 40...

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Abstract

A defect in the function of at least one active switching element of an active bridge rectifier is identified. The invention relates to a method for detecting defects in the function of at least one active switching element (41a-41f) of an active bridge rectifier (40) of a motor vehicle electrical system (10), said active bridge rectifier A rectifier converts a certain amount of AC voltage (u(v)) into a DC voltage (u(b+)). A voltage profile of at least one of the alternating voltage (u(v)) and the direct voltage (u(b+)) is detected. On the basis of a comparison of one or more maximum and / or minimum values ​​of the voltage curves with each other and / or with predetermined values, it is determined that there is a presence in the function of at least one active switching element (41a-41f) defect. A device for carrying out the corresponding method is likewise the subject of the invention.

Description

technical field [0001] The invention relates to a method for detecting defects in the function of at least one active switching element of an active bridge rectifier of an on-board electrical system of a motor vehicle and a device for carrying out such a method according to the preambles of the independent claims. Background technique [0002] In order to feed a DC system from a rotating current system, for example to feed a motor vehicle's electrical system via a multi-current generator, rectifiers of different designs can be used. In motor vehicle electrical systems, bridge rectifiers of six-pulse, eight-pulse or ten-pulse design are usually used, corresponding to the three-phase, four-phase or five-phase rotating current generators which are usually designed here. However, the invention is also applicable to bridge rectifiers with other phase numbers. [0003] If generators are then briefly referred to, electrical machines that can be operated as generators and as electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02M7/219
CPCH02M1/32H02M7/219H02M1/325H02M7/2195
Inventor R.赫比希P.N.科恩
Owner SEG AUTOMOTIVE GERMANY GMBH
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