Voltage Conversion Apparatus Noise Reduction via Magnetic Field Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional voltage conversion apparatuses with first and second loop circuits generate noise due to alternating magnetic fields caused by high-speed ON/OFF operations of switching elements, leading to magnetic field variations.
Innovation Solution
The apparatus redesigns the arrangement of parts such that the direction of the magnetic field in the first loop circuit during the ON operation of a switching element is the same as the direction of the magnetic field in the second loop circuit during its OFF operation, effectively opposing and reducing the noise generated by magnetic field variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the first and second loop circuits are arranged on a common surface or separate surfaces of a printed circuit board with conventional layout, then the circuit implementation is simple and compact, but magnetic fields in opposite directions are generated alternately during switching operations, resulting in noise generation due to magnetic field variation
Solution Approach 1:
The patent applies asymmetry by arranging the first and second loop circuits in a specific asymmetric configuration where the first loop circuit is positioned above the second loop circuit. This asymmetric arrangement ensures that the magnetic field directions from both circuits align in the same direction during switching operations, preventing magnetic field cancellation and reducing noise generation while maintaining compact design
2Productivity
If high-speed ON/OFF operation of switching elements is performed to achieve efficient voltage conversion, then the voltage conversion efficiency is improved, but magnetic field variation occurs due to alternating current directions in the loop circuits, generating noise
Solution Approach 1:
The patent merges the magnetic field effects of the first and second loop circuits by positioning them such that their magnetic field directions align. This combining approach ensures that during high-speed switching operations, the magnetic fields from both circuits reinforce each other rather than canceling out, thereby reducing magnetic field variation and associated noise while maintaining efficient voltage conversion
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 significantly reduces noise due to magnetic field variations, improving the noise reduction effectiveness in voltage conversion apparatuses with shared inductance components.
Implementation Method 1
a current passes through the first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first circuit, wherein a direction of a magnetic field through the first loop circuit generated at the ON operation of the first switching element in the first circuit is the same as a direction of a magnetic field through the second loop circuit generated at the OFF operation of the first switching element in the first circuit
Data Source
AI summary
The present invention is related to a voltage conversion apparatus having a first loop circuit and a second loop circuit which share an inductance component, in which a current passes through the first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first loop circuit, characterized in that a direction of a magnetic field through the first loop circuit generated at the ON operation of the first switching element in the first loop circuit is the same as a direction of a magnetic field through the second loop circuit generated at the OFF operation of the first switching element in the first loop circuit subsequent to the ON operation.