Matrix Converter Parallel Switch Modules
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Solution Overview
Problem
Current matrix converters face limitations in increasing capacity due to rated current restrictions and surge voltage issues, which hinder the efficient conversion of AC power to arbitrary voltage and frequency.
Innovation Solution
The implementation of a matrix converter design with multiple bidirectional switches connected in parallel to input and output phases, along with adjacent arrangements of switches and capacitors, reduces current flow and surge voltage, allowing for increased capacity and efficient power conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the capacity of the matrix converter is increased, then the power conversion capability is improved, but the rated current restriction and surge voltage issues worsen
Solution Approach 1:
The matrix converter is segmented into multiple independent bidirectional switch modules (first bidirectional switch module and second bidirectional switch module) that operate in parallel. Each module handles a portion of the total current, thereby reducing the rated current restriction on individual switches and enabling higher overall power capacity without exceeding component current ratings.
Solution Approach 2:
Snubber circuits are pre-configured for each bidirectional switch module to provide beforehand cushioning against surge voltages. This prior protection mechanism allows the system to handle higher power levels by preventing surge voltage damage that would otherwise limit the converter's capacity increase.
2Reliability
If multiple bidirectional switches are connected in parallel, then the current flow through each switch is reduced, but the device complexity increases
Solution Approach 1:
The parallel switch configuration is segmented into two distinct modules (first and second bidirectional switch modules), each with its own dedicated snubber circuit. This segmentation manages complexity by organizing parallel components into structured modules rather than a monolithic configuration, making the system more manageable while maintaining current distribution benefits.
Solution Approach 2:
Multiple bidirectional switches are merged into parallel modules that share common input and output phases. This merging approach reduces individual switch current flow while the modular structure keeps device complexity manageable through functional grouping and shared components.
3Temperature
If the switches and capacitors are arranged adjacently, then the cooling efficiency is improved, but the manufacturing complexity increases
Solution Approach 1:
Bidirectional switches and capacitors are merged into adjacent arrangements within integrated modules. This spatial merging improves cooling efficiency by placing heat-generating switches near heat-dissipating capacitors and enables unified thermal management. The modular adjacent arrangement simplifies manufacturing through standardized module assembly rather than complex individual component placement.
Data Source
AI summary
A matrix converter includes a plurality of first bidirectional switches electrically connected to each of input phases of an AC power supply and each of output phases of a load, respectively, and a plurality of second bidirectional switches electrically connected to each of the input phases and each of the output phases, respectively. The first bidirectional switch and the second bidirectional switch are electrically connected in parallel to one of the input phases and one of the output phases.