Compressor Housing Rear Wall Cooling Jacket for Power Electronics
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Solution Overview
Problem
Existing charging apparatuses for combustion engines rely on insufficient air cooling, leading to a less compact construction due to the lack of effective heat management.
Innovation Solution
The power electronics circuit is strategically placed between the compressor housing rear wall and the electric motor, with a cooling jacket on the rear wall to enhance cooling, and insulating measures are used to prevent heat transfer from charge air, allowing for a compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If air cooling is used for the charging apparatus, then the construction is simpler, but the cooling effect is insufficient and the construction is less compact
Solution Approach 1:
The patent combines the cooling function with the existing compressor housing structure by integrating a cooling jacket into the housing that utilizes the compressed air from the compressor itself to cool the power electronics circuit and motor. This merging of functions achieves effective cooling without adding separate cooling systems, thus maintaining construction simplicity while improving cooling effectiveness and compactness
2Temperature
If a cooling jacket is added to the compressor housing rear wall, then cooling effect is improved, but device complexity increases
Solution Approach 1:
The compressor housing rear wall is designed to serve multiple functions: it acts as a structural component of the housing, a mounting surface for the power electronics circuit, and simultaneously serves as part of the cooling system through the integrated cooling jacket. This multi-functionality reduces the need for additional separate components, thereby improving cooling effect while minimizing the increase in device complexity
3Volume of moving object
If the power electronics circuit is arranged between the compressor housing rear wall and the electric motor, then space is saved, but heat management becomes more challenging
Solution Approach 1:
The power electronics circuit is nested within the space between the compressor housing rear wall and the electric motor, utilizing otherwise unused space. The cooling jacket is simultaneously integrated into the rear wall structure, creating a nested arrangement where the cooling system is embedded within the housing structure, achieving compactness while maintaining effective heat management through the close proximity cooling arrangement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration results in improved cooling for the electric motor, bearing, and power electronics circuit, achieving a more compact and efficient structure while maintaining effective heat management.
Implementation Method 1
the compressor housing rear wall (6) is provided with a cooling jacket (10), preferably for cooling water
Implementation Method 2
it is also advantageous to insulate the compressor housing and the rear wall from the motor and from the power electronics circuit
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a charging apparatus (20) for a combustion engine (21) comprising an electrically driven compressor (1) which has a compressor housing (2), in which a compressor wheel (3) is arranged, said compressor wheel being mounted on one end (4) of a rotor shaft (5), and which has a compressor housing rear wall (6); and comprising an electric motor (7), the shaft (8) of said electric motor being connected to the rotor shaft (5) which is mounted on the compressor housing (2), and comprising a power electronics circuit (9), wherein the power electronics circuit (9) is arranged between the compressor housing rear wall (6) and the electric motor (7).