Protection Circuit for Matrix Convertor Driving Signals
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Solution Overview
Problem
Matrix conversion devices require accurate time sequence control to prevent errors and noise-induced short-circuits, which can damage circuits and affect performance.
Innovation Solution
A protection circuit with sub-protection modules and detection systems that selectively couple driving signals to a reference voltage or ground to prevent errors and overcurrents, ensuring safe operation by interlocking multiple sub-protection circuits for rigorous control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple protection circuits are used to detect and respond to driving signal errors, then the reliability of the convertor is improved, but the device complexity increases
Solution Approach 1:
The protection circuit is divided into multiple independent sub-protection circuits (first sub-protection circuit, second sub-protection circuit, etc.), each responsible for detecting specific error conditions in driving signals. This segmentation allows the system to maintain high reliability through comprehensive error detection while managing complexity by organizing protection functions into modular, independent units that can be systematically implemented and maintained.
2Object-affected harmful factors
If driving signals are coupled to ground or reference voltage to prevent errors, then the safety of the convertor is improved, but the device complexity increases
Solution Approach 1:
The protection circuit introduces intermediate coupling elements that connect driving signals to ground or reference voltage through controlled pathways. These intermediaries (protection switches, coupling circuits) act as mediators that can safely discharge erroneous signals without directly interfering with normal signal operation, thereby preventing short-circuits while maintaining a relatively simple and controlled circuit structure.
Data Source
AI summary
A protection circuit applied to a convertor including M pieces of driving switch modules each coupled to a power source, a load and one of M sets of driving signals. The ith driving switch module is controlled by the ith set of driving signals to selectively enable current paths between the power source and the load. A first sub protection circuit in the protection circuit includes a first protection switch module and a first detection module coupled to the first protection switch module. When the ith set of driving signals indicates an error event, the first protection switch module selectively couples the ith set of driving signals to a reference voltage according to a first detection signal. M and i are positive integers, and i is not larger than M.