Semiconductor Transformer Submodule Shielding for Insulation and Heat

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Solution Overview

Problem

Semiconductor transformers face insulation issues and induction heating problems due to the proximity of high and low voltage units, which are not effectively addressed by existing technologies, leading to increased weight, volume, and temperature rise.

Innovation Solution

A submodule for semiconductor transformers with a transforming unit placed between high and low voltage units, featuring a shield with specified conductivity to prevent induction heating and improved insulation through increased separation distance and epoxy glass enclosures, along with vent holes for heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If high voltage and low voltage units are placed close together in a semiconductor transformer, then weight and volume are reduced, but insulation performance deteriorates and induction heating occurs

Engineering Contradiction:

Improvevolume of semiconductor transformerVSAvoidinsulation performance

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

A shield structure with specified conductivity is introduced as an intermediary element between the high voltage unit and low voltage unit. This shield acts as a mediator that blocks magnetic field penetration, preventing induction heating in the capacitor while maintaining compact packaging. The shield is positioned at a specific distance from the coil and has controlled conductivity to effectively attenuate the magnetic field without causing excessive losses.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shield structure is designed with non-uniform properties - it has specified conductivity in certain regions and specific geometric characteristics (such as being positioned at predetermined distances from the coil). This local differentiation allows the shield to effectively block magnetic fields in critical areas while maintaining overall system compactness and managing heat distribution.

Inventive Principle:

Principle #3Local quality

2Weight of stationary object

If high voltage and low voltage units are placed close together in a semiconductor transformer, then weight and volume are reduced, but temperature rise due to induction heating increases

Engineering Contradiction:

Improveweight of semiconductor transformerVSAvoidtemperature rise

Core Design Contradiction:

Weight of stationary objectVSTemperature

Solution Approach 1:

The shield serves as a thermal and magnetic intermediary that protects the capacitor from induction heating. By positioning the shield between the coil and capacitor with appropriate spacing and conductivity, it blocks the magnetic field that would otherwise induce currents and generate heat in the capacitor, thus controlling temperature rise while maintaining compact design.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shield structure converts the potentially harmful magnetic field into a controlled phenomenon. By using a conductive shield, the magnetic field induces currents in the shield itself (which is designed to handle this), thereby protecting other components from induction heating. The shield effectively sacrifices itself to protect the capacitor from thermal damage.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Enhances insulation performance and prevents induction heating by securing a separation distance between high and low voltage units, reducing weight and volume while maintaining optimal size and preventing temperature rise.

Implementation Method 1

a shield which surrounds the inductor by placing apart from the inductor in at least a specific distance... made of a conductor with at least specified conductivity

Methodology Applied

Scientific EffectMagnetic field shielding: Faraday Cage

Implementation Method 2

a transforming unit for converting the high-voltage AC power into low-voltage AC power

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20240282500A1Submodule for semiconductor transformer in single packaging with excellent performance of insulation and prevention against insulation heating

Publication Date: 2024.08.22 HYOSUNG HEAVY IND CORP

AI summary

The present invention relates to a submodule for a semiconductor transformer in single packaging with excellent performance of insulation and prevention against induction heating that is capable of preventing induction heating caused by a magnetic field generated from coils by being equipped with a shield with at least specified conductivity in the semiconductor transformer while improving insulation performance by securing separation distance between a high voltage unit and a low voltage unit in the semiconductor transformer. The submodule for the semiconductor transformer in single packaging with excellent performance of insulation and prevention against induction heating in accordance with the present invention comprises: a high voltage unit for converting high-voltage low-frequency AC power into high-voltage AC power; a transforming unit for converting the high-voltage AC power into low-voltage AC power; and a low voltage unit for converting the low-voltage AC power into low-voltage DC power.