Converter Module Synchronization via Current Signal Intermediary
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Solution Overview
Problem
In switched-mode converter systems with multiple modules, synchronizing switching operations across modules is challenging, especially when connected in series, as synchronization voltage signals are divided, leading to non-optimal signal-to-noise ratios and compromised detection accuracy.
Innovation Solution
A synchronization current signal is used to synchronize the switching of converter modules, which is added to the converter system current and sensed by individual modules, allowing them to adjust their switch control signals' frequency and phase, thereby coordinating switching operations without the disadvantages of synchronization voltage signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization voltage signals are used to synchronize converter modules connected in series, then the modules can coordinate their switching operations, but the voltage signals are divided across the modules leading to non-optimal signal-to-noise ratios and compromised detection accuracy
Solution Approach 1:
The patent introduces a current signal as an intermediary carrier for synchronization information. Instead of directly transmitting voltage synchronization signals that get divided in series connections, the system modulates synchronization data onto a current signal that flows through all series-connected modules. This current-based intermediary preserves signal integrity while enabling coordination across all modules.
Solution Approach 2:
The patent replaces the voltage-based synchronization mechanism with a current-based mechanism. By substituting voltage signals with current signals for synchronization purposes, the system avoids the signal division problem inherent in series voltage connections while maintaining the ability to coordinate switching operations across modules.
2Stability of the object's composition
If synchronization voltage signals are used in series-connected converter modules, then module coordination is achieved, but the signal-to-noise ratio deteriorates due to voltage division
Solution Approach 1:
The patent introduces a current signal as an intermediary carrier for synchronization information. Instead of directly transmitting voltage synchronization signals that get divided in series connections, the system modulates synchronization data onto a current signal that flows through all series-connected modules. This current-based intermediary preserves signal integrity while enabling coordination across all modules.
Solution Approach 2:
The patent changes the fundamental parameter used for synchronization from voltage to current. By switching from voltage-based synchronization to current-based synchronization, the system fundamentally alters the signal transmission mechanism to avoid voltage division effects in series connections, thereby maintaining optimal signal-to-noise ratios.
Data Source
AI summary
Various examples are directed to a converter system comprising first and second series-connected converter modules and a synchronization circuit. The synchronization circuit may modulate a reference signal onto a carrier signal to generate a synchronization current signal and the synchronization current signal to an output current of the converter system to generate an aggregated output current. A first converter module may receive the aggregated output current from a first current sensor and generate a first reproduced synchronization signal at least in part from the aggregated output current. A first switch control signal for switching at least one switch at the first converter may be generated based at least in part on the first reproduced synchronization signal.