Final Drive Inverter Housing With Busbar EMC Filtering
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Solution Overview
Problem
Existing electric final drive trains for motor vehicles face challenges in protecting electrical interfaces from electromagnetic radiation, requiring a compact, cost-effective, and easy-to-assemble solution that prevents interference between electronic devices.
Innovation Solution
An electrically operable final drive train with an EMC filter element integrated into the inverter housing, where busbars pass through the filter to conductively couple the power electronics unit and electric machine, providing effective electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If electronic devices are arranged in close proximity to one another, then the installation space is utilized efficiently and the design is compact, but electromagnetic radiation from one device interferes with the electronic functions of other devices
Solution Approach 1:
An EMC filter element is introduced as an intermediary component between the power electronics unit and the electric machine. This filter element is arranged in the inverter housing and is passed through by busbars, creating an electromagnetic shielding barrier that allows the devices to remain in close proximity while protecting against electromagnetic radiation interference.
Solution Approach 2:
The EMC filter element is integrated within the inverter housing structure, and the busbars pass through the filter element itself. This nested arrangement allows multiple components (housing, filter, busbars) to occupy the same spatial envelope without increasing overall volume, maintaining compact design while providing EMC protection.
2Object-affected harmful factors
If EMC protection measures are added to protect the electrical interface, then electromagnetic shielding is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The inverter housing serves multiple functions: it provides structural containment for the power electronics unit, acts as a mounting structure for the EMC filter element, and provides a pathway for the busbars. By making the housing multi-functional, additional EMC protection capability is added without requiring a separate dedicated housing structure.
Solution Approach 2:
The EMC filter element is combined with the busbar structure, where the busbars pass directly through the filter element. This merging of functions allows the electrical connection and EMC shielding to be achieved simultaneously with a single integrated component arrangement, reducing overall system 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 solution achieves a compact design with effective EMC shielding, allowing electronic devices to operate in close proximity without electromagnetic interference, while being cost-effective and easy to assemble.
Implementation Method 1
the first busbar passes through an EMC filter element (9) arranged inside the inverter housing (8)
Data Source
AI summary
An electrically operable final drive train for a motor vehicle including an electric machine that can be energized by a power electronics unit and a transmission arrangement which is coupled to the electric machine in a torque-transmitting manner. An electrical high-voltage interface is formed between the power electronics unit and the electric machine, and the power electronics unit is received in an inverter housing. The inverter housing is passed through by at least one first busbar, and which is electrically conductively coupled to the electric machine. The first busbar passes through an EMC filter element arranged inside the inverter housing.