Electric Oil Pump Ground Path Layout for EMI Suppression
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Solution Overview
Problem
Electronic oil pumps generate electromagnetic radiation that interferes with electronic components and external devices, affecting their performance.
Innovation Solution
An electronic oil pump design that includes a conductive member connecting the electric control board assembly's reference ground plane with the pump housing, utilizing a partition member and a shielding member to create a low impedance path for interference voltage, thereby reducing electromagnetic radiation and static interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an electric control board assembly is used to control the electronic oil pump, then the pump can be precisely controlled, but electromagnetic radiation is generated that interferes with electronic components and external devices
Solution Approach 1:
A conductive member is introduced as an intermediary element to provide an electrical connection path between the electric control board assembly and the pump housing. This mediator allows controlled electrical interaction while maintaining physical separation and providing electromagnetic shielding, thus resolving the contradiction between precise control capability and electromagnetic interference generation.
Solution Approach 2:
The harmful electromagnetic radiation is extracted and directed through a designated path by using the conductive member and pump housing as a shielding structure. The electromagnetic interference is channeled and contained rather than being allowed to radiate freely, separating the harmful effect from the surrounding electronic components and external devices.
2Object-affected harmful factors
If electromagnetic radiation shielding is implemented to protect electronic components, then interference is reduced, but the device structure becomes more complex
Solution Approach 1:
The pump housing is designed to serve multiple functions: it acts as both the structural enclosure for the pump mechanism and as an electromagnetic shielding element. By making the housing conductive and providing electrical connection through the conductive member, the same structure provides both mechanical support and electromagnetic protection, avoiding the need for separate shielding components and thus reducing overall device complexity.
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
The design effectively minimizes electromagnetic interference and static electricity impact on electronic components and external devices by providing a low impedance path and grounding mechanism.
Implementation Method 1
the conductive member electrically connects a reference ground plane of the electric control board assembly with the pump housing
Implementation Method 2
the electric control board assembly may generate electromagnetic radiation, these electromagnetic radiation may cause interference to electronic components and/or other external devices
Data Source
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AI summary
An electric oil pump comprises a stator assembly and an electronic control panel assembly which are electrically connected. The electronic control panel assembly comprises an electronic component. The electric oil pump further comprises a conductive pump housing and a conductive member that electrically connects a reference ground layer of the electronic control panel assembly and the pump housing. The above arrangement facilitates reducing electromagnetic radiation of the electronic control panel assembly, thereby reducing interference of the electromagnetic radiation of the electronic control panel assembly on the electronic component and/or other external devices.