ISOP Hybrid Power Converter Current Sharing Under Component Mismatch
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Solution Overview
Problem
Multi-phase converters in high-power applications face challenges due to imbalances caused by component tolerances, leading to inefficiencies and current imbalances, especially when using semi-resonant hybrid converters in parallel configurations, which are sensitive to variations in resonant tank components.
Innovation Solution
The implementation of an 'input-series, output-parallel' (ISOP) configuration for regulated hybrid converters, combined with passive or active balancing mechanisms, ensures equalization of load currents and input capacitor voltages, using a controller to manage phase shifts and sharing, thereby compensating for component mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If semi-resonant hybrid converters are used in parallel configurations, then power conversion efficiency is improved, but current imbalances occur due to component tolerances
Solution Approach 1:
The patent implements feedback control mechanisms that monitor the operating conditions of each converter and adjust control parameters dynamically. This feedback system detects current imbalances caused by component tolerances and compensates by modifying switching frequencies or duty cycles, thereby maintaining current balance while preserving the efficiency benefits of parallel semi-resonant hybrid converter configurations.
Solution Approach 2:
The patent employs parameter adjustment strategies where control parameters such as switching frequency, duty cycle, or resonant frequency are dynamically modified based on detected operating conditions. By changing these parameters in response to component tolerance variations, the system maintains optimal efficiency while compensating for current imbalances between parallel converters.
2Loss of energy
If multi-phase converters are used to distribute power conversion, then efficiency and thermal management are improved, but complexity of control increases
Solution Approach 1:
The patent merges the control functions of multiple phases into a unified control architecture that manages all phases through shared control logic and common sensing resources. This consolidation approach reduces the overall control complexity while maintaining the efficiency and thermal management benefits of multi-phase power conversion by coordinating phases through integrated control rather than independent control circuits.
3Reliability
If component tolerances are reduced to eliminate imbalances, then current balance is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements self-balancing mechanisms where the control system automatically detects and compensates for current imbalances without requiring manual calibration or precision matching of components. The system uses sensed operating conditions to autonomously adjust control parameters, eliminating the need for tight component tolerance specifications while maintaining current balance, thereby reducing manufacturing costs.
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 approach reduces current imbalances and enhances efficiency by automatically sharing load currents among parallel converters, maintaining stable operation even with component tolerances, and providing fast response to dynamic load changes.
Implementation Method 1
configured to transfer energy from the first input to the first output through at least one magnetic component
Implementation Method 2
configured to transfer energy from the first input to the first output through at least one magnetic component and at least one capacitive component
Data Source
AI summary
A power converter circuit is disclosed. The power converter circuit includes: a first regulated power converter having a first input and a first output; and a second regulated power converter having a second input and a second output. The inputs are configured to be coupled to a source, and the outputs are configured to be coupled to a load. The inputs are coupled in series; the outputs are coupled in parallel. The first regulated power converter is a regulated hybrid converter configured to transfer energy from the first input to the first output through at least one magnetic component and at least one capacitive component.