Electronic module for electric drive of vehicle

Abstract

The invention relates to an electronic module (10) for an electric drive in a vehicle, comprising an input-side electrical connection (12) for inputting an input current generated by an energy source (20); an intermediate circuit (14) with a capacitor; a semiconductor bridge circuit, connected in parallel to the intermediate circuit (14), wherein the bridge circuit comprises a high-side switch (162aa), and a low-side switch (164aa) connected in series to the high-side switch (162aa), wherein the high-side switch (162aa) is connected to the input-side electrical connection (12) via a first current path, wherein the low-side switch (164aa) is connected to the input-side electrical connection (12) via a second current path, wherein the first current path and the second current path are the same length; and an output-side electrical connection (18a,18b,18c) for outputting an output current generated by the bridge circuit from the input current.

Description

technical field [0001] The present invention relates to the field of electric vehicles, in particular to the field of electronic modules for electric drives. Background technique [0002] The use of electronic modules, such as power electronic modules, in motor vehicles has increased dramatically over the past few decades. This is due on the one hand to the need to improve fuel savings and increase vehicle efficiency, and on the other hand to advances in semiconductor technology. Prominent examples of such electronic modules are DC / AC inverters, which are used to energize electrical machines, such as motors or generators, with polyphase alternating current. Here, the direct current generated by means of a DC energy source, such as a battery, is converted into a polyphase alternating current. For this purpose, the electronic module comprises a plurality of electronic components, eg semiconductor power switches, by means of which a bridge circuit (eg a half bridge) is realiz...

AI Technical Summary

Problems solved by technology

This asymmetrical arrangement results in a bulky rectifier unit with increased leakage inductance and in which the switching behavior of the power semiconductors deteriorates

Furthermore, this series configuration of power switches requires complex schemes to couple DC current from the energy source and to couple AC current out to the electric machine (such as a motor)

For example, multi-dimensional busbar solutions may be required, resulting in increased requirements for busbar cross-sections to carry the required current

This also makes the entire power electronics system more difficult to cool, which affects the functionality of the electronic modules

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