Electromagnetic Transducer Slot and Overlapping Loop Design
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Solution Overview
Problem
Existing electromagnetic transducers face challenges in placing conductive material in close proximity to the activity being sensed or driven, while also requiring uncomplicated production processes for various applications such as musical instrument pickups, microphone elements, and metal detectors.
Innovation Solution
The design involves a primary loop formed by an electrically conductive strip with oppositely-disposed ends and a slot, bent to create overlapping sections with a gap, allowing sensing or driving elements to be placed in the slot and a transformer to be connected, enabling efficient transformation of electrical power and proximity to the activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional multi-turn solenoid coils are used, then the transducer can be manufactured with standard processes, but the conductive material cannot be positioned in close proximity to the activity being sensed or driven
Solution Approach 1:
The conductive strip is segmented into multiple sections (first section, second section, third section) that are bent to form a primary loop with overlapping sections. This segmentation allows the conductive material to be positioned in close proximity to the activity being sensed while maintaining ease of manufacture through standardized bending and assembly processes.
Solution Approach 2:
The conductive strip is bent from a linear configuration into a three-dimensional primary loop structure where the first section overlies the second section. This dimensional transformation enables the conductive material to achieve close proximity to the activity being sensed while preserving manufacturing simplicity through controlled bending operations.
2Power
If a single turn of conductive material is used, then the transducer can transform electrical power with high current to voltage ratio, but the conductive material mass near the activity is limited
Solution Approach 1:
The first section and second section of the primary loop are merged in space by bending the strip so that the first section overlies the second section with a gap therebetween. This merging creates a folded configuration that effectively doubles the conductive material mass near the activity while maintaining single-turn transformation efficiency for high current to voltage ratio conversion.
Solution Approach 2:
The primary loop structure nests the first section over the second section, creating a compact configuration where multiple sections of conductive material are positioned in close proximity to the activity being sensed. This nested arrangement increases the effective conductive material mass without compromising the single-turn transformation capability.
3Adaptability or versatility
If the strip is bent to create overlapping sections, then sensing elements can be received in the slot, but the manufacturing process becomes more complex
Solution Approach 1:
The strip is segmented with a slot extending between oppositely-disposed ends, creating defined regions (first section, second section, third section) that can be independently bent and configured. This segmentation enables sensing elements to be received in the slot while maintaining a systematic bending process that limits overall device complexity.
Solution Approach 2:
The slot is positioned at a specific location between the oppositely-disposed ends of the strip, creating a localized region for receiving sensing elements. This local quality approach allows sensing elements to be integrated without requiring complex bending configurations throughout the entire strip, thereby maintaining manufacturing feasibility.
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 allows for effective transformation of high current to voltage ratios, cancels ambient electromagnetic fields, and positions a large mass of conductive material close to the activity, improving sensing capabilities compared to conventional multi-turn solenoid coils.
Implementation Method 1
A single turn of conductive material can be simultaneously used as a sensing or driving element and the primary turn of a current transformer. Such devices can be configured to transform electrical power with a relatively high current to voltage ratio (low impedance) in their primary circuit into a similar power level in their secondary circuit, albeit with a high voltage to current ratio (high impedance.)
Implementation Method 2
This configuration allows for effective transformation of high current to voltage ratios, cancels ambient electromagnetic fields, and positions a large mass of conductive material close to the activity
Data Source
AI summary
Electromagnetic transducers suitable for a variety of uses, including but not limited to musical instrument pickups. Such a transducer has a primary loop formed by an electrically conductive strip having oppositely-disposed ends and a slot extending therebetween that defines electrically conductive runners. The strip is bent to define a first section of the primary loop that overlies a second section of the primary loop and a gap therebetween. The transducer further comprises sensing or driving elements that are at least partially received in the slot in the first section of the primary loop and a transformer electrically connected to the strip at one of the ends thereof opposite the first section of the primary loop.