Ladder Bridge Defibrillator Circuit for Stable High-Voltage Switching
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Solution Overview
Problem
H bridge circuits are inadequate for safely handling high voltages, requiring more stable output circuits for applications like defibrillators.
Innovation Solution
A defibrillator utilizing a ladder bridge circuit with a control unit to manage switching elements, ensuring stable high voltage output by providing alternative current paths and dispersing surge voltages across multiple paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an H bridge circuit is used for high voltage output, then the circuit structure is simple, but the stability and reliability at high voltage deteriorates
Solution Approach 1:
The H bridge circuit is segmented into multiple independent circuit units (first, second, third, and fourth circuit units), each containing switching elements that can operate independently. This segmentation allows the system to maintain stability at high voltages by distributing the voltage stress across multiple units rather than concentrating it in a single H bridge structure.
Solution Approach 2:
The circuit transitions from a two-dimensional H bridge configuration to a three-dimensional ladder bridge structure by adding series and parallel connections of multiple circuit units. This dimensional expansion creates additional current paths and voltage distribution routes, improving high voltage stability while managing complexity through structured organization.
2Reliability
If a ladder bridge circuit is used to improve high voltage stability, then the reliability improves, but the device complexity increases
Solution Approach 1:
Multiple circuit units are merged into a unified ladder bridge structure where the first and second circuit units are connected in parallel, and the third and fourth circuit units are connected in series. This merging creates a cohesive system that achieves high voltage stability through coordinated operation of all units, balancing the increased complexity with unified structural organization.
Solution Approach 2:
Each circuit unit within the ladder bridge structure is designed to perform multiple functions: voltage switching, current path management, and surge voltage distribution. This multi-functionality reduces the need for separate dedicated components, thereby managing overall device complexity while maintaining enhanced reliability.
3Adaptability or versatility
If multiple switching elements are used in the ladder bridge circuit, then the versatility and current path options improve, but the probability of failure increases
Solution Approach 1:
The ladder bridge circuit incorporates redundant switching elements and multiple current paths in advance, so that if one switching element fails, alternative paths are already available to maintain circuit operation. This beforehand cushioning against failure maintains reliability while preserving versatility.
Solution Approach 2:
The control unit dynamically changes the operational parameters of different switching elements based on circuit conditions and failure states. By adjusting which switching elements are active and how current is distributed, the system maintains versatility in current path switching while compensating for individual element failures to preserve overall reliability.
Data Source
AI summary
A defibrillator disclosed in the present application including at least: a high voltage capacitor charged through a battery power source; a ladder bridge circuit connected to one end of the high voltage capacitor; a control unit for controlling an on/off operation of switching elements constituting the ladder bridge circuit, wherein the ladder bridge circuit comprises: a first circuit unit and a second circuit unit, one ends of which are connected to one end of the high voltage capacitor and which are connected in parallel to each other; and a third circuit unit connected in series to the other ends of the first circuit unit and the second circuit unit.