Annular Reactor for Parallel Chopper Load Sharing
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Solution Overview
Problem
Conventional power supply systems require multiple reactors for each chopper, leading to increased size and cost due to the need for a reactor for each chopper, even when choppers are connected in parallel to handle greater load capacities.
Innovation Solution
A reactor design featuring an annular iron core with multiple coils separately wound around it, where the coils' electrodes are connected to both power supply terminals and the load, allowing for a single reactor to support multiple power supplies connected in parallel, thereby reducing the overall size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reactor is provided for each chopper, then the load current can be equally shared among choppers and switching influences can be suppressed, but the device size and cost increase
Solution Approach 1:
Multiple reactors that were previously provided separately for each chopper are merged into a single shared reactor. The reactor has a common magnetic core with multiple coils wound around it, where each coil corresponds to one chopper. This consolidation reduces the total number of reactors from N (one per chopper) to 1 (shared by all N choppers), thereby reducing device size and cost while maintaining the necessary current sharing function through the coupled magnetic circuits.
Solution Approach 2:
The shared reactor performs multiple functions simultaneously: it provides inductance for each chopper branch, enables current sharing among all choppers, suppresses switching influences, and couples the magnetic circuits of all choppers. This multi-functionality is achieved through the common magnetic core that links all coils, allowing one reactor structure to replace what would traditionally require N separate reactor structures.
2Reliability
If a reactor is provided for each chopper, then the load current can be equally shared among choppers and switching influences can be suppressed, but the device cost increases
Solution Approach 1:
Multiple reactors that were previously provided separately for each chopper are merged into a single shared reactor. The reactor has a common magnetic core with multiple coils wound around it, where each coil corresponds to one chopper. This consolidation reduces the total number of reactors from N (one per chopper) to 1 (shared by all N choppers), thereby reducing device size and cost while maintaining the necessary current sharing function through the coupled magnetic circuits.
3Adaptability or versatility
If multiple reactors are provided for multiple choppers, then each chopper can be independently controlled, but the device size increases
Solution Approach 1:
Multiple reactors that were previously provided separately for each chopper are merged into a single shared reactor. The reactor has a common magnetic core with multiple coils wound around it, where each coil corresponds to one chopper. This consolidation reduces the total number of reactors from N (one per chopper) to 1 (shared by all N choppers), thereby reducing device size and cost while maintaining the necessary current sharing function through the coupled magnetic circuits.
Solution Approach 2:
The shared reactor is segmented into multiple independent coils wound around a common magnetic core. Each coil can be independently controlled by its corresponding chopper, allowing independent control of each power supply branch. The magnetic core provides coupling between the coils, enabling current sharing while the segmented coil structure maintains independent controllability.
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 design enables a single reactor to efficiently manage load current across multiple power supplies, reducing the device's size and cost while maintaining effective load sharing and electromagnetic coupling control.
Implementation Method 1
N coils separately wound around the iron core... The N coils have first electrodes connected to output terminals of the N power supplies, respectively, and second electrodes each connected to the load
Data Source
AI summary
A reactor includes an annular iron core and four coils separately wound around the iron core. The four coils have first electrodes connected to output terminals of four choppers, respectively, and second electrodes each connected to a load. Therefore, the four choppers can be connected in parallel to the load by one reactor.