Encapsulated bus circuit for fluid heating systems

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Solution Overview

Problem

Industrial electric heaters require high electrical current and large, expensive power components due to low voltage operation, necessitating complex grounding strategies and transformers, which are inefficient and costly.

Innovation Solution

A termination assembly with electrically nonconductive members and embedded electrical circuits, featuring apertures for power pins, connectors, and dielectric encapsulation, allowing for efficient connection and distribution of power to resistive heaters while reducing installation labor and enhancing serviceability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If low voltage operation is used for industrial electric heaters, then electrical safety is improved, but electrical current and power component size increase significantly

Engineering Contradiction:

Improveelectrical safetyVSAvoidpower component size

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent changes the voltage parameter from low voltage to medium voltage operation, which fundamentally alters the electrical characteristics of the heating system. This parameter change reduces the required electrical current for the same power output, thereby reducing the size of power components, cables, and grounding requirements while maintaining electrical safety through proper medium voltage design and insulation

Inventive Principle:

Principle #35Parameter changes

2Reliability

If low voltage operation is used for industrial electric heaters, then electrical safety is improved, but device complexity increases due to transformers and grounding strategies

Engineering Contradiction:

Improveelectrical safetyVSAvoidgrounding and transformer complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

By changing the operating voltage parameter to medium voltage, the system eliminates the need for step-down transformers and complex grounding strategies required by low voltage high-current systems. Medium voltage equipment has standardized grounding requirements that are simpler to implement while providing equivalent or superior safety

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention extracts and eliminates unnecessary components from the system, specifically removing the requirement for large transformers and complex grounding networks that are mandated by low voltage operation. The medium voltage approach allows direct connection to standard industrial power sources without additional transformation equipment

Inventive Principle:

Principle #2Taking out (Extraction)

3Quantity of substance

If medium voltage operation is implemented, then power component size is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvepower component sizeVSAvoidmanufacturing complexity

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The heating system is divided into modular heating zones with discrete power phases, each independently controllable and manufacturable. This segmentation allows for standardized manufacturing of modular units that can be assembled to meet different power requirements, reducing overall manufacturing complexity while enabling medium voltage operation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention creates universal medium voltage heating modules that can be configured for different applications and power levels. These multi-functional modules use standardized components and connections that simplify manufacturing across different product variants while maintaining the benefits of medium voltage operation

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

The solution enables efficient power distribution to resistive heaters, reduces installation complexity, and allows for custom designs with shorter lead times, while maintaining structural integrity and electrical safety.

Implementation Method 1

resistance heaters that convert electrical power to heat

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

resistive heating element surrounded by dielectric material

Methodology Applied

Scientific EffectDielectric insulation: Dielectric

Data Source

PatentUS12480686B2Encapsulated bus circuit for fluid heating systems

Publication Date: 2025.11.25 WATLOW ELECTRIC MANUFACTURING CO

AI summary

A termination assembly for a heater assembly includes a plurality of resistive heaters arranged in discrete power phases, each resistive heater comprising a resistive heating element surrounded by dielectric material and a sheath. The termination assembly includes a plurality of electrically nonconductive members. Each electrically nonconductive member includes a plurality of apertures configured to receive power pins of the plurality of resistive heaters. The termination assembly includes a plurality of connectors configured to connect the power pins to the electrically nonconductive members. Each electrically nonconductive member includes a number of the plurality of connectors corresponding to a number of power pins being terminated. The termination assembly includes an electrical circuit embedded in or disposed on at least one of the plurality of electrically nonconductive members.