Power Source Semiconductor Noise Reduction via Dynamic Bandwidth Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power source semiconductors for vehicles experience interference due to electromagnetic wave noise from elements operating at fixed switching frequencies, leading to potential malfunctions.
Innovation Solution
A method and apparatus that supply preset reference switching frequencies to elements, sense interference, and increase bandwidths using a spread spectrum method to reduce noise interference, specifically by adjusting bandwidths proportional to the magnitude of the reference switching frequencies through a control unit and bandwidth adjusting unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If elements operate at fixed switching frequencies, then power conversion efficiency is improved, but electromagnetic wave noise interference increases
Solution Approach 1:
The patent applies parameter changes by varying the switching frequencies of power conversion elements dynamically instead of using fixed frequencies. The control unit adjusts frequency parameters based on operational conditions, which maintains power conversion efficiency while reducing electromagnetic interference through frequency modulation.
Solution Approach 2:
The system transitions from static fixed-frequency operation to dynamic frequency-adjustable operation. The switching frequencies are made variable and adaptable based on real-time sensing of electromagnetic interference levels, allowing the system to optimize both efficiency and interference reduction.
2Reliability
If bandwidth of reference switching frequencies is increased, then noise interference resistance is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback control where the control unit senses electromagnetic interference levels and automatically adjusts the bandwidth of reference switching frequencies accordingly. This closed-loop feedback mechanism improves noise resistance while keeping the adjustment process automated and integrated within existing control architecture.
Solution Approach 2:
The control unit performs multiple functions including frequency generation, interference sensing, bandwidth adjustment, and element control within a single integrated device. This multi-functionality reduces overall system complexity despite the added bandwidth adjustment capability.
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 reduces the influence of electromagnetic wave noise, preventing malfunctions by distributing frequency signals at a wider bandwidth, making them less susceptible to noise interference.
Implementation Method 1
the bandwidth adjusting unit increases the bandwidth of the reference switching frequencies through a spread spectrum method
Data Source
AI summary
A method for controlling a power source semiconductor may include: supplying, by a switching frequency supply unit, preset respective reference switching frequencies to a plurality of elements which are operated according to a respective switching frequency; sensing, by a control unit, sensing interference in the plurality of elements, based on operations of the elements according to the respective reference switching frequencies; setting, by the control unit, bandwidths for the respective reference switching frequencies when the interference in the plurality of elements is sensed; and increasing, by a bandwidth adjusting unit, bandwidth of the respective reference switching frequencies supplied through the switching frequency supply unit, based on the bandwidths for the respective reference switching frequencies.