Multi-Output Power Converter System with Parallel Output Topology
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Solution Overview
Problem
Conventional power conversion systems face challenges in meeting multi-port requirements, achieving cost-effectiveness, and maintaining high efficiency due to issues with power balancing and power factor compliance, leading to increased power loss.
Innovation Solution
A power conversion system with N power converters, where each converter has an input terminal, a first output terminal, and a second output terminal, connected in a circular arrangement to form multiple total output terminals, allowing for regulation of input power levels to ensure consistent output and meet power factor requirements, thereby reducing power loss and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-port power conversion system with multiple power converters is used, then the system can process multiple power inputs, but it cannot meet multi-port requirements and requires additional isolated transformers increasing cost
Solution Approach 1:
The system divides the power conversion function into multiple independent power converters (first power converter, second power converter, etc.), each with its own output terminals. These segmented converters work in parallel to provide multi-port output capabilities without requiring a complex centralized structure with isolated transformers.
Solution Approach 2:
The output terminals of multiple power converters are connected in parallel to form total output terminals (first total output terminal, second total output terminal, etc.). This merging of parallel outputs achieves multi-port functionality while eliminating the need for additional isolated transformers, reducing system complexity and cost.
2Productivity
If multiple power converters output power independently in a multi-port system, then each converter can operate autonomously, but power balancing becomes difficult and requires large amounts of reactive current
Solution Approach 1:
The control device continuously monitors the output power of each power converter and adjusts their operation accordingly. By implementing feedback control, the system achieves automatic power balancing among converters without requiring large amounts of reactive current, thereby reducing power loss while maintaining high productivity.
Solution Approach 2:
The system dynamically adjusts the operating parameters of each power converter based on real-time power distribution requirements. This dynamic control enables flexible power balancing across multiple converters, optimizing energy efficiency while maintaining high output capability under varying load conditions.
3Adaptability or versatility
If power converters are connected in parallel with independent outputs, then the system can provide multiple output ports, but voltage sharing cannot be achieved without injecting large reactive current
Solution Approach 1:
The control device implements feedback control to monitor and adjust the output voltage of each power converter. This ensures automatic voltage sharing among parallel-connected converters without requiring injection of large reactive currents, thereby maintaining ease of operation and power factor compliance while providing multi-port output capability.
Solution Approach 2:
The system maintains equipotential conditions at the total output terminals by coordinating the output voltages of multiple power converters. This equipotential control achieves voltage sharing among parallel converters without requiring reactive current injection, simplifying operation and ensuring power factor compliance across all output ports.
Data Source
AI summary
A power conversion system includes N power converters. Each power converter includes an input terminal, a first output terminal and a second output terminal. Each of the N power converters receives a DC power through the corresponding input terminal. The first output terminal of a first power converter of the N power converters and the second output terminal of an N-th power converter of the N power converters are connected in parallel to form an N-th total output terminal to output an N-th total output power. The first output terminal of an i-th power converter of the N power converters and the second output terminal of an (i−1)-th power converter of the N power converters are connected in parallel to form an (i−1)-th total output terminal to output an (i−1)-th total output power.