Capacitor Connection Layout for Straight Low-Inductance Busbars

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Capacitor systems with multiple capacitors experience significant induction losses and material inefficiencies due to the need for bent busbars, which cause electrical interferences and require excessive material for connectors.

Innovation Solution

The capacitors with alternating polarity are arranged in an offset manner, allowing their outputs to be routed rectilinearly, minimizing induction losses and reducing material requirements by maintaining a consistent spacing between non-homopolar connectors, which are either parallel or twisted.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If bent busbars are used to connect capacitors in parallel, then the capacitors can be electrically coupled with corresponding polarity connections, but induction effects and material requirements increase significantly

Engineering Contradiction:

Improveelectrical coupling reliabilityVSAvoidinduction losses

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

Instead of bending the busbars to achieve the desired connection geometry, the patent inverts the approach by alternating the polarity directions of adjacent capacitors. This allows the busbars to remain straight while achieving the same electrical coupling effect, thereby eliminating induction losses caused by bent connectors.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces asymmetry in the arrangement of capacitors by alternating their polarity directions in adjacent positions. This asymmetric configuration allows non-homopolar connectors to lead out at consistent spacing without requiring bent busbars, thus reducing material requirements and induction effects.

Inventive Principle:

Principle #4Asymmetry

2Ease of manufacture

If bent busbars are used to route connectors within the capacitor system, then electrical connections can be established, but the amount of material required increases

Engineering Contradiction:

Improveconnector routing feasibilityVSAvoidcopper material consumption

Core Design Contradiction:

Ease of manufactureVSLoss of substance

Solution Approach 1:

Rather than bending connectors to achieve proper routing, the patent inverts the approach by alternating capacitor polarity directions. This enables straight busbar connections that reduce copper material consumption while maintaining manufacturing feasibility through consistent connector spacing.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the spatial arrangement parameter of capacitors by alternating their polarity directions. This parameter change allows connectors to be routed in straight lines with consistent spacing, thereby reducing the total length and material requirement of busbars while maintaining ease of manufacture.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If connectors change direction to lead out of the capacitor system, then electrical connections can be established, but induction losses increase

Engineering Contradiction:

Improveelectrical connection stabilityVSAvoidinduction losses from directional changes

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

Instead of changing connector direction to achieve proper lead-out geometry, the patent inverts the approach by alternating capacitor polarity directions. This allows connectors to maintain a consistent orientation and spacing as they lead out of the system, eliminating induction losses from directional changes while preserving connection stability.

Inventive Principle:

Principle #13The other way round (Inversion)

4Adaptability or versatility

If multiple positive and negative connectors are provided in the capacitor system, then multiple electrical subsystems can be connected, but the complexity of connector arrangement increases

Engineering Contradiction:

Improvesubsystem connection capabilityVSAvoidconnector arrangement complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses asymmetric arrangement of capacitors with alternating polarity directions to simplify the connector arrangement. This asymmetric configuration allows multiple positive and negative connectors to be distributed evenly with consistent spacing, reducing arrangement complexity while maintaining the capability to connect multiple electrical subsystems.

Inventive Principle:

Principle #4Asymmetry

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 arrangement minimizes electrical interferences and reduces material usage by eliminating directional changes in the connectors, thereby enhancing the efficiency and cost-effectiveness of the capacitor system.

Implementation Method 1

The bent busbars disadvantageously lead to induction effects

Methodology Applied

Scientific EffectInduction effects: Electromagnetic Induction

Data Source

PatentUS20240161982A1Capacitor System with Improved Connections, and Production Method

Publication Date: 2024.05.16 BAYERISCHE MOTOREN WERKE AG

AI summary

A capacitor system is disclosed that includes a first capacitor with a connection for a first pole and a connection for a second pole and a second capacitor with a connection for a first pole and a connection for a second pole. The first poles are like poles in relation to one another and the second poles are like poles in relation to one another and the first poles are of a polarity different from the second poles. Two different-polarity connections of two capacitors are connected to the capacitors on one side of the capacitor system and lead out from the capacitor system at a substantially constant distance from one another, in parallel and/or in a twisted state.