Electric Machine Pole Housing Protective Wall
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Solution Overview
Problem
The existing arrangement of mechanical and electronic components in a common housing interior in electrical machines can lead to electrical short circuits due to dirt particles or condensation water connecting soldering points or pins, causing malfunctions.
Innovation Solution
A separately manufactured protective wall is used to shield the circuit board from mechanical components within the pole housing, preventing loose small parts from reaching the circuit board while allowing for quick connection of the circuit board to the stator coils, and the protective wall is adapted to fit the shape of the components for optimal sealing and space savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If mechanical and electronic components are arranged in a common housing interior, then space utilization is improved, but electrical short circuits occur due to dirt particles or condensation
Solution Approach 1:
The housing interior is segmented into a mechanical component region and an electronic component region by the protective wall. The protective wall is arranged between the circuit board and the mechanical components, dividing the common housing space into functionally separated zones that prevent contamination while maintaining compact overall dimensions.
Solution Approach 2:
The protective wall acts as an intermediary barrier between the mechanical components (shaft, rotor, stator, bearings) and the electronic circuit board. It physically blocks dirt particles, metal fragments, and condensation from reaching the circuit board, while still allowing the system to maintain a compact common housing structure.
2Reliability
If a protective wall is added to separate circuit board from mechanical components, then electrical short circuit risk is reduced, but device complexity increases
Solution Approach 1:
The protective wall is implemented as a thin-walled structure that provides effective separation between mechanical and electronic components. This thin-film approach achieves the required protection function while minimizing the added structural complexity and space occupation within the housing.
Solution Approach 2:
The protective wall serves multiple functions simultaneously: it acts as a physical barrier against contaminants, provides structural support within the housing, and helps define the spatial arrangement of components. This multi-functionality reduces the need for additional separate protective elements.
3Productivity
If circuit board is arranged on flange side for shortest connection path, then connection efficiency is improved, but exposure to loose small parts increases
Solution Approach 1:
The protective wall is positioned to prevent loose small parts and conductive fragments from reaching the circuit board before they can cause short circuits. This preliminary protective action allows the circuit board to be optimally positioned on the flange side for short connection paths without compromising electrical safety.
Data Source
Figure 1
AI summary
Disclosed is an electric machine (10) comprising a pole housing (12) and a printed circuit board (14) for controlling the electric machine (10). The circuit board (14) is arranged on a flanged side (16) of the pole housing (12), and a protective wall (18) which protects the circuit board (14) from loose small parts is arranged between the circuit board (14) and the pole housing (12).