Electric Pump Grounding Contact for Compact EMC and ESD Paths
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Solution Overview
Problem
Existing electric pumps in automobiles face challenges in creating compact electrical grounding connections for Electro Magnetic Compatibility (EMC) and Electro Static Discharge (ESD) paths, leading to complex assemblies that increase time and cost.
Innovation Solution
An electric pump design incorporating a contact element made of one conductor that integrates EMC and ESD paths by electrically connecting the stator, grounding lead of the control substrate, and the conductive housing, using a contact element with bases extending in parallel planes for mechanical support and vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate grounding connections are provided for EMC and ESD paths, then electrical grounding reliability is improved, but device complexity and assembly time increase
Solution Approach 1:
The patent combines separate EMC grounding connection and ESD grounding connection into a single integrated grounding connection. The housing serves as a common grounding path that provides both EMC shielding (connecting to stator) and ESD protection (connecting to control substrate) functions simultaneously, eliminating the need for separate grounding structures and reducing assembly complexity.
Solution Approach 2:
The housing is designed to perform multiple grounding functions: it acts as both an EMC shield by connecting to the stator and an ESD protection path by connecting to the control substrate. This multi-functional design allows a single component to fulfill multiple grounding requirements, reducing the overall number of parts and simplifying the grounding system.
2Reliability
If multiple separate grounding connections are made, then electrical grounding reliability is improved, but assembly time increases
Solution Approach 1:
The patent merges multiple grounding operations into a single integrated structure. The housing simultaneously provides EMC grounding to the stator and ESD grounding to the control substrate through its inherent conductive properties, eliminating the need for multiple separate assembly steps and reducing total assembly time.
Solution Approach 2:
The conductive housing automatically serves as both the EMC shield and ESD protection path without requiring additional grounding components or complex assembly procedures. The housing's own conductive material and structural design enable it to fulfill multiple grounding functions inherently, reducing assembly complexity and time.
3Volume of moving object
If compact arrangement is implemented, then space efficiency is improved, but grounding connection complexity increases
Solution Approach 1:
In the compact pump design, the housing is utilized as a multi-functional component that simultaneously provides structural support, EMC shielding, and ESD protection. By making the housing itself conductive and integrating it into the grounding system, the patent eliminates the need for separate grounding wires or connectors, thereby maintaining compact dimensions while avoiding grounding connection complexity.
Solution Approach 2:
The patent combines structural and grounding functions into the housing. The same conductive housing that provides mechanical support also serves as the grounding path for both EMC and ESD requirements, eliminating the need for additional grounding components and maintaining space efficiency in the compact pump design.
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 design reduces space, manufacturing, and assembly costs while simplifying the assembly process by providing an integrated grounding path for static electric current flow and electromagnetic interference protection.
Implementation Method 1
the contact element electrically connects the stator, the grounding lead of the control substrate and the conductive material of the housing
Implementation Method 2
suppress the static electric current generated by connecting the control substrate to the low electrical resistance path, so that the static electric current is discharged to the grounding potential
Data Source
AI summary
An electric pump for automobile including a driving device, a pump device, a control substrate, a housing and a contact element. The driving device having a rotor rotatable about an axis X and a stator. The pump device is driven by the driving device. The housing is accommodating at least the driving device, the control substrate and the pump device, the housing being formed at least of a conductive material. The control substrate with a drive circuit for controlling the driving device and a grounding lead. Further, the contact element made of one conductor electrically connects the stator, the grounding lead of the control substrate and the conductive material of the housing.