Reconfigurable Bus Bar Noise Filter for Variable EMC Conditions
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Solution Overview
Problem
Existing noise removal filters for electric-power control devices are inflexible and require different components for varying filter configurations, making them inefficient and costly.
Innovation Solution
A noise removal filter with an annular inductance and capacitor unit that can be attached to bus bars in variable positions, allowing for easy reconfiguration of the filter configuration to accommodate different electromagnetic compatibility (EMC) noise scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a predetermined filter configuration is used with fixed connection relationships, then the filter structure is simple and reliable, but it cannot adapt to different EMC noise scenarios requiring multiple different components
Solution Approach 1:
The patent applies the dynamics principle by making the filter configuration adjustable rather than fixed. The connection relationships between the inductance and capacitor can be dynamically changed through switching elements that allow reconfiguration of the filter circuit. This enables the same physical components to serve multiple filter configuration purposes, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent implements universality by designing a filter where the same inductance and capacitor components can be used across different filter configurations. By introducing switching mechanisms, the universal components can be reconnected in different patterns to address various EMC noise scenarios, eliminating the need for multiple dedicated component sets and thereby reducing overall system complexity while improving versatility.
2Reliability
If different components are prepared for different filter configurations, then each configuration can be optimized for specific noise types, but the quantity of components and cost increase
Solution Approach 1:
The patent reduces the quantity of components by implementing universality. Instead of having separate inductance and capacitor components for each filter configuration, a single set of components is designed to be reconfigurable. The switching elements allow the same components to be connected in different patterns, maintaining optimized noise removal effectiveness for various EMC scenarios while significantly reducing the total number of components required.
Solution Approach 2:
The patent applies parameter changes by altering the connection parameters (switching states) rather than changing the physical components themselves. By changing how the existing components are connected through the switching elements, the filter can adapt to different noise scenarios without requiring additional components. This maintains the effectiveness of each configuration while reducing component quantity.
3Adaptability or versatility
If multiple different components are used for different configurations, then each configuration can be optimized, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent improves ease of manufacture by implementing universality with a single set of reusable components. The same inductance and capacitor components can be manufactured once and then reconfigured for different applications through switching mechanisms. This eliminates the need for manufacturing multiple different component sets, significantly simplifying the manufacturing process while maintaining configuration flexibility.
Solution Approach 2:
The patent applies dynamics by using switching elements that allow post-manufacturing reconfiguration. The filter can be adjusted to different configurations after the basic components are manufactured, reducing the manufacturing complexity. The switching mechanism provides the flexibility needed for different applications without requiring complex manufacturing processes for each configuration variant.
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
Enables the use of common components across different filter configurations, providing a cost-effective and adaptable solution for noise removal in electric-power control devices.
Implementation Method 1
an inductance (32a, 32b) and a capacitor unit (34) which are attached to the plurality of bus bars (80) in variable positions
Implementation Method 2
a capacitor unit (34) including a capacitor (90, 92) having one terminal electrically connected to surfaces of the plurality of bus bars (80) and another terminal electrically connected to a reference potential
Data Source
AI summary
A noise removal filter for removing noise propagated through a plurality of bus bars to which an output of an electric-power control device is to be supplied. The noise removal filter includes: an annular inductance attached to the plurality of bus bars that are inserted through the annular inductance; and a capacitor unit including a capacitor having a terminal electrically connected to surfaces of the plurality of bus bars and another terminal electrically connected to a reference potential. The inductance and the capacitor unit are attached to the plurality of bus bars in variable positions.