Power Electronics Device Master Slave Control
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Solution Overview
Problem
Existing power electronics systems face complexity in manual management as the scale increases, particularly in determining the master/slave relationships among multiple devices for power source phasing, leading to inflexible installation and maintenance challenges.
Innovation Solution
A power electronics device with a control unit that selects a master device based on power conversion characteristic information, enabling autonomous cooperative control and flexible installation locations while maintaining capacity through hierarchical master/slave determination and communication between units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple power electronics devices are activated in parallel to increase output capacity, then the power output increases, but the complexity of manual management increases
Solution Approach 1:
The power electronics devices automatically determine their own master/slave relationships through autonomous negotiation based on power conversion characteristic information, eliminating the need for manual configuration and management. Each device independently participates in the master determination process, making the system self-organizing and scalable.
Solution Approach 2:
The master/slave relationship is not fixed but dynamically determined based on real-time power conversion characteristics. The system can adaptively reconfigure master/slave relationships when devices are added or removed, allowing flexible expansion without manual intervention.
2Device complexity
If a fixed supposition is applied for master/slave determination, then the control structure is simplified, but the adaptability to different uses decreases
Solution Approach 1:
The system uses power conversion characteristic information as a variable parameter to dynamically determine master/slave relationships. Instead of fixed roles, devices are assigned roles based on their real-time operational characteristics, enabling adaptation to different uses while maintaining a consistent control framework.
3Reliability
If manual determination of master/slave relationships is used, then the control precision is maintained, but the productivity decreases
Solution Approach 1:
Devices exchange power conversion characteristic information and use this feedback to autonomously determine master/slave relationships. The feedback mechanism ensures that the determination is based on actual operational capabilities, maintaining control precision while enabling automatic scalability.
Data Source
AI summary
There is provided a power electronics device including: a first connection unit, a second connection unit, a power conversion unit and a control unit. The first connection unit and the second connection unit are connected to a first power line and a second power line of plural power lines. The power conversion unit converts power from one of the first and second connection units outputs converted power from the other of the first and second connection units. The control unit selects a master device from power electronics devices connected to a third power line that is one of the power lines including the first power line and the second power line, based on power conversion characteristic information of the power electronics devices. The master device controls other power electronics devices except the master device out of the power electronics devices, regarding output of power to the third power line.