Precision Magnetic Coil Winding System with Real-Time Feedback Control

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Solution Overview

Problem

The manufacturing of high-intensity, uniform magnetic coils for MRI requires precise control over winding geometry to avoid defects like gaps and anomalies, which is challenging due to human error in manual correction and the difficulty in achieving consistent epoxy distribution, especially in epoxy-supported coils.

Innovation Solution

An automated system for precision magnetic coil winding that includes a wire disposing assembly with a support, axial traverser, and radial positioning device, coupled with a controller unit for real-time feedback and correction, ensuring precise wire placement and resin application to minimize defects and enhance efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual correction is used for wire placement adjustments, then operators can detect and correct errors, but human errors occur and the process slows down

Engineering Contradiction:
Improvewire placement precisionVSAvoidcoil winding speed
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The system uses automatic control systems with sensors and feedback mechanisms to monitor wire placement in real-time and make corrections without human intervention. The controller receives feedback from position sensors and automatically adjusts the wire feeding and placement mechanisms, enabling the system to self-correct placement errors while maintaining high speed winding operations.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent implements closed-loop feedback control where sensors continuously monitor wire position and placement accuracy, and the controller uses this feedback information to make real-time adjustments to the winding process. This feedback mechanism ensures precise wire placement while maintaining automated high-speed operation without requiring manual intervention.

Inventive Principle:
Principle #23Feedback

2Quantity of substance

If wet winding method is used to maximize epoxy coverage, then coverage is improved, but wire placement becomes difficult due to slipping

Engineering Contradiction:
Improveepoxy coverageVSAvoidwire placement accuracy
Core Design Contradiction:
Quantity of substanceVSManufacturing precision

Solution Approach 1:

The system applies epoxy coating to the wire in a controlled manner before the winding process begins, or applies it in precise amounts during winding. The controller regulates the epoxy dispensing to ensure adequate coverage while preventing excessive epoxy that would cause wire slippage. This preliminary or controlled application ensures both coverage and placement accuracy.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent controls the viscosity, application amount, and timing of epoxy application as adjustable parameters. By optimizing these parameters, the system achieves sufficient epoxy coverage for thermal and mechanical stability while preventing excessive epoxy that would cause wire placement errors. The controller dynamically adjusts epoxy application parameters based on winding conditions.

Inventive Principle:
Principle #35Parameter changes

3Manufacturing precision

If precise control over winding geometry is implemented, then defects are reduced, but manufacturing complexity increases

Engineering Contradiction:
Improvewinding geometry precisionVSAvoidmanufacturing system complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent integrates multiple functions into a single automated winding system that combines wire feeding, epoxy application, position monitoring, and error correction capabilities. This multi-functional system achieves precise winding geometry control without requiring separate manual operations for each function, thereby reducing overall manufacturing complexity while maintaining high precision.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system replaces manual mechanical wire placement and error correction operations with automated control systems that use sensors, feedback loops, and computer-controlled mechanisms. This substitution reduces the complexity of manual operations while achieving superior and more consistent winding geometry precision through automated control.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Manufacturing precision

If automated control is implemented for wire placement, then precision is improved and speed is increased, but system complexity increases

Engineering Contradiction:
Improvewire placement precisionVSAvoidcontrol system complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The automated control system uses feedback from position sensors and monitoring devices to continuously track wire placement accuracy. The controller processes this feedback information and makes real-time adjustments to maintain precise placement. This feedback mechanism enables high precision and speed while managing system complexity through intelligent control algorithms.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The control system is designed to autonomously monitor, detect, and correct wire placement errors without external intervention. The system self-regulates the winding process by comparing actual placement with target positions and automatically making corrections, thereby achieving high precision and speed while minimizing the need for complex external control mechanisms.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS9201128B2Systems for producing precision magnetic coil windings
Publication Date: 2015.12.01 GE PRECISION HEALTHCARE LLC
  • US9201128B2 patent drawing
  • US9201128B2 patent drawing
  • US9201128B2 patent drawing

AI summary

A system for producing precision magnetic coil windings is provided. The system includes a wire disposing assembly having a support, an axial traverser sub-assembly, and a support arm. The support is configured to receive a plurality of turns of a wire. The axial traverser sub-assembly is operatively coupled to the support. The support arm includes a wire disposing device. The system further includes a linear stage, a monitoring unit, a feedback unit, and a controller unit. The linear stage is operatively coupled to the support arm. Moreover, the controller unit is configured to axially position an incoming portion of the wire and provide reference trajectories for tracking.