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Current detection device and method for detecting current

A current detection and current measurement technology, which is applied in the direction of measuring current/voltage, measuring device, and only measuring current, can solve the problem of large current in the sensing path, and achieve the effect of small structure size and low cost

Active Publication Date: 2020-09-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, relatively high currents can also occur in the sensing path, especially in the event of a fault

Method used

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  • Current detection device and method for detecting current
  • Current detection device and method for detecting current
  • Current detection device and method for detecting current

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A schematic example circuit of a circuit arrangement for controlling a current in a power path is shown. In this case, the circuit arrangement 1 comprises a current control device 20 . The current control device 20 may be, for example, a bipolar transistor (IGBT) with an insulated gate. Here, the IGBT includes an input terminal C, an output terminal E, and a control terminal G. Here, the current between the input terminal C and the output terminal E can be controlled by applying a control signal at the control terminal G. In addition, the IGBT further includes a sensing terminal S. Here, the measuring current I is supplied via the IGBT at the sense terminal S Sense . Here, the measured current I Sense with the current I in the power path of the circuit arrangement shown E Corresponding. In the case of a known IGBT, it is possible to measure the current I from the sensing path Sense Infer the power path current I E . Here, the measured current I of th...

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PUM

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Abstract

The invention relates to the evaluation of a variable of an electric current in a power path by evaluating another electric current in a measuring path. To avoid excessively large electric currents in the measuring path, the current in said path is limited to a predetermined maximum limit value.

Description

technical field [0001] The present invention relates to a current detection device and method for detecting current. In particular, the invention relates to a current detection device and a method for detecting a current in a measurement path which conducts a current corresponding to the current in a power path. [0002] Although the invention has been described in connection with an IGBT with a sense terminal, the invention can also be used for any other application in which a current in another current path corresponding to the current in the power path should be detected. analyze. Background technique [0003] Publication US 5,877,617 A discloses a circuit arrangement in which a load is fed current in a current path. Furthermore, the circuit arrangement includes a further transistor which supplies a current corresponding to this current for the load. The current supplied via the further transistor is used for monitoring and evaluating the flow current for the load. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/573G01R19/00
CPCG01R19/0092G05F1/573G01R15/146
Inventor H.西弗特S.布茨曼
Owner ROBERT BOSCH GMBH