Backup Power Current Sensing With a Semi-Closed Rogowski Coil
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Solution Overview
Problem
Existing backup power devices face challenges with large component counts, high costs, and significant board area occupation due to the use of sampling resistors and current transformers for current detection, limiting their widespread application.
Innovation Solution
A backup power device utilizing a semi-closed Rogowski coil and regulation circuit, perpendicular to the power board, for current detection, coupled with a controller to manage switching components based on detection signals, reducing board area and cost while ensuring safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sampling resistor or current transformer is used for current detection, then current detection function is achieved, but board area occupation and device complexity increase
Solution Approach 1:
The patent combines the current detection function with the existing conductive wire structure by using the conductive wire itself as the Rogowski coil, merging the detection function with the power transmission structure. This eliminates the need for separate detection components and reduces board area occupation.
Solution Approach 2:
The conductive wire serves dual purposes: it acts as both the power transmission conductor and the Rogowski coil for current detection. This multi-functionality reduces the number of components needed and simplifies the overall device structure.
2Measurement precision
If a sampling resistor or current transformer is used for current detection, then current detection function is achieved, but device cost increases
Solution Approach 1:
The conductive wire structure serves itself by functioning as both the power transmission medium and the detection sensor. This self-service approach eliminates the need for additional detection components, thereby reducing device cost and manufacturing complexity.
Solution Approach 2:
The conductive wire performs multiple functions including power transmission and current detection, reducing the need for separate components and lowering overall device cost.
3Measurement precision
If traditional current detection components are used, then detection accuracy is maintained, but device miniaturization is limited
Solution Approach 1:
The detection function is merged into the existing conductive wire structure, eliminating the need for additional detection components and enabling device miniaturization while maintaining detection accuracy.
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
The solution provides effective current detection with reduced board space, enabling miniaturization and lower costs, facilitating wider application in space-constrained scenarios.
Implementation Method 1
the semi-closed Rogowski coil crosses the conductive wire, and is configured to: induce a current in the conductive wire and generate an induction signal
Data Source
AI summary
A backup power device includes a power board and a regulation board. The regulation board is perpendicularly disposed on a surface of the power board. The power board includes a conductive wire and a switching component. The regulation board includes a semi-closed Rogowski coil and a regulation circuit. The semi-closed Rogowski coil crosses the conductive wire, and is configured to: induce a current in the conductive wire and generate an induction signal. The regulation circuit is configured to performing operation processing on the induction signal for output. The power board assembly further includes a controller, where the controller is connected to the regulation circuit and the switching component, and is configured to control on or off of the switching component based on an output signal of the regulation circuit.