Busbar Noise Filter with Integrated Magnetic Core Fixing

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Solution Overview

Problem

Existing power conversion apparatuses face challenges in effectively reducing noise emissions from busbars due to the inefficient positioning and securing of magnetic cores, which affects the overall noise filtering performance.

Innovation Solution

A power conversion apparatus is designed with a magnetic core surrounding the busbar and a fixing member that supports and secures the magnetic core to the busbar, utilizing openings or protrusions for precise positioning and stabilization, allowing for effective noise reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a magnetic core is used to reduce noise from busbars, then noise filtering performance is improved, but the positioning and securing of the magnetic core becomes complex

Engineering Contradiction:

Improvenoise emissionsVSAvoidpositioning and securing structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The fixing member integrates multiple functions: it secures the magnetic core to the busbar while providing positioning features (protrusions or openings) that align with corresponding features on the busbar. This merging of securing and positioning functions into a single component reduces overall structural complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixing member acts as an intermediary component between the magnetic core and the busbar, providing a simplified interface that eliminates the need for complex direct attachment mechanisms. The fixing member translates the securing requirement into a simple fastening operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If multiple components are used to secure the magnetic core, then stability is improved, but the number of components increases

Engineering Contradiction:

Improvemagnetic core stabilityVSAvoidnumber of components

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

Multiple functions (securing, positioning, and stabilizing the magnetic core) are merged into a single fixing member component. This eliminates the need for separate positioning elements and securing elements, reducing the total component count while maintaining stability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixing member is designed as a multi-functional component that simultaneously provides mechanical support, positional alignment, and stabilization of the magnetic core. This universal design approach allows one component to fulfill multiple roles that would traditionally require several separate parts.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 configuration enhances noise reduction by stabilizing the magnetic core's position, simplifies the assembly process, and reduces the number of components, resulting in improved filtering performance and ease of assembly.

Implementation Method 1

a magnetic core disposed to surround the busbar

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Data Source

PatentUS10658939B2Power conversion apparatus and noise filter

Publication Date: 2020.05.19 YASKAWA DENKI KK

AI summary

A power conversion apparatus includes: a busbar; a magnetic core disposed to surround the busbar; and a fixing member that supports the magnetic core and is secured to the busbar. A noise filter includes: a magnetic core disposed to surround a busbar of a power conversion apparatus, and a fixing member that supports the magnetic core and is secured to the busbar.