Shared Charging Loop Circuit for DC Micro-Grid Converters
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Solution Overview
Problem
Existing bidirectional DC/DC converters in DC micro-grid systems waste resources due to the presence of charging loops on both high-voltage and low-voltage sides, leading to inefficiencies and increased component count.
Innovation Solution
A charging loop circuit that selectively connects to either the high-voltage or low-voltage side loop via switches, reducing the number of components and optimizing PCB layout by integrating charging loops, and incorporating fault-tolerant structures to replace faulty current-limiting resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If charging loops are provided on both high-voltage and low-voltage sides of the bidirectional DC/DC converter, then charging functionality is ensured for both sides, but resource waste increases and component count rises
Solution Approach 1:
The patent merges the charging loops of the high-voltage and low-voltage sides into a single shared charging loop. The charging loop is configured to be selectively connectable to either the high-voltage side or the low-voltage side through switching devices, eliminating the need for separate charging loops on both sides while ensuring charging functionality is available for both sides when needed.
Solution Approach 2:
The single charging loop is designed to serve multiple functions by being selectively connectable to different sides of the converter. It can function as the high-voltage side charging loop or the low-voltage side charging loop depending on the switching state, making it a universal charging solution that replaces multiple dedicated charging loops.
2Reliability
If charging loops are provided on both high-voltage and low-voltage sides, then charging capability is maintained, but device complexity and PCB layout space increase
Solution Approach 1:
The patent combines multiple charging loop components into a single shared infrastructure. By merging the high-voltage and low-voltage charging loops into one unified charging loop with selective connectivity, the total number of components is reduced while maintaining the capability to charge both sides of the converter.
Solution Approach 2:
The charging loop incorporates dynamic switching capability through switching devices that can dynamically connect the charging loop to either the high-voltage side or the low-voltage side. This dynamic reconfiguration allows a single static charging loop structure to serve multiple functional roles, reducing overall device complexity.
3Reliability
If separate charging loops are used for high-voltage and low-voltage sides, then independent charging is ensured, but cost and manufacturing complexity increase
Solution Approach 1:
The patent creates a universal charging loop that can independently charge either the high-voltage side or the low-voltage side through controlled switching. This single multi-functional charging loop replaces two separate charging loops, simplifying manufacturing processes and reducing assembly complexity while maintaining independent charging capability for both sides.
Data Source
AI summary
Provided by the present application are a Direct Current (DC) micro-grid system, a charging loop circuit and a control method thereof. The charging loop circuit selectively connects a charging loop to a first side loop or a second side loop through a set of switches.