Phase-Specific Arc Suppression for High-Speed Contactor Switching

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Solution Overview

Problem

Electrical current contact arcing in relays and switches leads to premature component failure, electromagnetic interference, and frequent maintenance needs, as existing solutions are not effective in managing the complex voltage transitions and rapid arc formation in high-speed applications.

Innovation Solution

A high-speed arc suppressor system utilizing phase-specific arc suppressors and high-speed switches that quickly switch between them, incorporating arc ignition detectors, trigger lock circuits, and high-speed arc extinguishing elements to suppress arcs between positive and negative AC domains, allowing for efficient bypassing of contacts during transition periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional arc suppressors are used, then arc suppression is provided, but they are not effective in high-speed applications with rapid arc formation and complex voltage transitions

Engineering Contradiction:

Improvearc suppression effectivenessVSAvoidswitching speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent implements dynamic switching between different arc suppressor configurations using high-speed switches that respond to real-time voltage transitions. The system dynamically adjusts the arc suppression circuitry based on the detected voltage state, enabling effective suppression in high-speed applications where static suppressors fail.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of the arc suppressor by switching between different circuit configurations based on voltage transitions. This includes changing the connectivity state of capacitors and switches to adapt the suppression mechanism to the current operating conditions, thereby maintaining effectiveness across varying speeds.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If phase-specific arc suppressors with high-speed switches are used, then arc suppression effectiveness improves, but device complexity increases

Engineering Contradiction:

Improvearc suppression effectivenessVSAvoidcircuit complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the arc suppression function into phase-specific suppressors, with each handler managing a particular phase or voltage state. This segmentation allows independent optimization of each suppressor unit and simplifies the control logic for each segment, making the overall complex system manageable through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The high-speed switches and driver circuitry serve multiple functions: they detect voltage transitions, activate appropriate suppressor configurations, and coordinate between different phases. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing complexity while maintaining effectiveness.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If rapid switching between phase-specific suppressors is implemented, then arclet suppression improves, but switching losses increase

Engineering Contradiction:

Improvearclet suppressionVSAvoidswitching losses

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent prepares the switching circuitry in advance by pre-charging capacitors and positioning switches in optimal states before voltage transitions occur. This preliminary action reduces the energy required during actual switching operations and minimizes arclet formation, thereby reducing both switching losses and improving suppression effectiveness.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The high-speed switches are designed to complete transitions rapidly, skipping through the high-loss intermediate states. By minimizing the time spent in transitional states where energy loss occurs, the system achieves effective arclet suppression while keeping switching losses acceptable.

Inventive Principle:

Principle #21Skipping (Rushing through)

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

Effectively suppresses arcs and arclets in high-speed applications, reducing contact damage and electromagnetic interference, while enabling rapid switching to manage frequent arc generation, thereby extending component life and reducing maintenance requirements.

Implementation Method 1

a first high speed switch configured to enable or disable operation of the first phase-specific arc suppressor

Methodology Applied

Scientific EffectElectrical switching:

Implementation Method 2

arc ignition detectors

Methodology Applied

Scientific EffectArc detection: Electric Arc

Data Source

PatentUS11756747B2High speed arc suppressor

Publication Date: 2023.09.12 ARC SUPPRESSION TECHNOLOGIES LLC

AI summary

A high speed arc suppressor and method include a first phase-specific arc suppressor configured to suppress arcing across contacts of the power contactor in a positive domain and a second phase-specific arc suppressor configured to suppress arcing across the contacts in a negative domain. First and second high speed switches are configured to enable and disable operation of an associated one of the first and second phase-specific arc suppressors. First and second drivers are configured to drive the first and second high speed switches.