Magnetic Field Circuit With Bidirectional Current Paths
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Solution Overview
Problem
Existing devices for generating alternating magnetic fields for application to body tissue lack flexibility in terms of frequency and current direction, which limits their therapeutic and physiological effects.
Innovation Solution
The apparatus includes an electric storage device, a first inductor, and connecting circuitry with a switching device and a second inductor, allowing electrical current to flow through either branch depending on the direction, enabling variable frequency and duration of magnetic field generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single inductor and fixed circuit configuration are used, then the device structure is simple, but the flexibility in frequency and current direction is limited
Solution Approach 1:
The circuit is divided into two separate branches: a first branch with a thyristor for controlling current in one direction, and a second branch with a diode for controlling current in the opposite direction. Each branch has its own inductor (first inductor L1 and second inductor L2), allowing independent control of current direction and frequency characteristics. This segmentation enables flexible adjustment of magnetic field parameters while maintaining manageable circuit complexity through modular design.
2Reliability
If the inductor is placed close to body tissue, then the magnetic field application is effective, but the circuit components become difficult to arrange
Solution Approach 1:
The circuit components (capacitor, thyristor, diode, and inductors) are arranged in a planar configuration that extends in multiple directions. The first branch extends in one direction from the capacitor while the second branch extends in another direction, allowing the inductors to be positioned close to body tissue without requiring three-dimensional stacking of components. This dimensional arrangement solves the spatial conflict between effective magnetic field application and circuit component layout.
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 configuration provides greater flexibility in generating magnetic fields, allowing for targeted therapeutic and physiological effects by varying the frequency and magnitude of the magnetic field applied to body tissue.
Implementation Method 1
a first inductor for generating a magnetic field for application to body tissue
Implementation Method 2
an electric storage device for storing electrical energy
Data Source
AI summary
A magnetic field for application to body tissue is generated via a first inductor. Connecting circuitry, including at least first and second branches, is provided between a capacitor arrangement comprising at least a first capacitor, and the first inductor. A switch forming part of the first branch electrically connects the capacitor arrangement to the first inductor enabling electrical current to flow through the first branch and the first inductor, thereby causing the first inductor to generate the field. The current flowing through the first branch represents a first direction of flow between the capacitor arrangement and the first inductor. An electric component conducts current primarily in a forward direction. That component forms part of the second branch, enabling current to flow between the capacitor arrangement and the first inductor through the second branch. The flow in the forward direction represents a second direction opposite the first. The capacitor of the capacitor arrangement has a variable capacitance.