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Power electronics for electric machine, power train, motor vehicle

A technology for power trains and motor vehicles, applied in electric solid state devices, electrical components, semiconductor devices, etc., can solve the problems of overheating of power semiconductors, low efficiency, and long thermal path of cooling power semiconductors, so as to shorten the thermal path and improve cooling. Effect

Pending Publication Date: 2021-11-30
DR ING H C F PORSCHE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem with the shown use of the stack is that the thermal paths for cooling the power semiconductors are long and thus inefficient
When cooled, this inefficiency can cause the power semiconductors to overheat at sustained high power and this power must be reduced

Method used

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  • Power electronics for electric machine, power train, motor vehicle
  • Power electronics for electric machine, power train, motor vehicle

Examples

Experimental program
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Effect test

Embodiment Construction

[0022] exist figure 1 shows a method for operating an electric machine according to an exemplary embodiment of the present invention (see figure 2 ) of inverter 1. The inverter 1 has power semiconductors 2 , which are embodied here as SiC semiconductors. A gate contact 3 and a source contact 4 are arranged on the top side of the power semiconductor 2 . The gate contact 3 and the source contact 4 are here embodied as busbars made of copper. Alternatively, the gate contact 3 and / or the source contact 4 may be made of aluminum.

[0023] A drain contact 5 is arranged on the bottom side of the power semiconductor 2 opposite the top side. The drain contact 5 is here also embodied as a busbar made of copper, and it can alternatively be made of aluminum. The drain contact 5 is arranged in the coolant channel 6 of the inverter 1 . A non-conductive coolant, preferably a dielectric, is pumped through the coolant channel 6 . For this purpose, the cooling device 7 of the inverter 1...

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PUM

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Abstract

The invention relates to an inverter (1) for operating an electric machine (10), comprising at least one power semiconductor (2) and a drain contact (5) arranged on the bottom side of the power semiconductor (2), the drain contact (5) being arranged in a coolant channel (6) for applying a coolant. The invention further relates to a drive train (20) and to a motor vehicle (100).

Description

technical field [0001] The invention relates to a power electronics device for an electric machine for feeding the electric machine with voltage or current. The invention also relates to a drive train with power electronics and an electric machine and to a motor vehicle. Background technique [0002] In order to operate an electric machine, it is necessary to supply this electric machine with a polyphase alternating voltage. Typically, and especially in electric machines used to tow motor vehicles, an inverter converts a DC voltage to an AC voltage. In this case, the inverter converts the torque demand of the control unit of the motor vehicle into voltages, which in turn generate current. [0003] An inverter typically has three components: a power section, a gate driver, and a controller. Power components typically include power semiconductors for inverting voltage. In addition, power components usually have intermediate circuit capacitors for energy coupling and sensor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/44H01L23/467H01L23/473H01L23/367H01L23/373H01L23/49H02M1/00H02M7/00
CPCH01L23/44H01L23/467H01L23/473H01L23/3677H01L23/3736H01L23/49H02M1/00H02M7/003H01L23/4735H05K7/20936
Inventor M·巴科夫P·福克斯S·沃切特
Owner DR ING H C F PORSCHE AG