Multi-Axis Eddy Current Brake for Smooth Torque Regulation
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Solution Overview
Problem
Eddy current brake configurations with single degrees of freedom lack the necessary tuning capabilities to manage a range of torque forces and often result in on/off braking, which is undesirable in applications requiring smooth and controlled braking.
Innovation Solution
The implementation of eddy current brake configurations with at least two rotational degrees of freedom, where a primary axis of rotation is angularly translated relative to a secondary axis, allowing for modulation of the braking action and improved kinematic control, enabling controlled braking responses across varying input conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single degree of freedom eddy current brake configurations are used, then the device complexity is reduced, but the torque regulation capability and braking smoothness deteriorate
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a static single-degree-of-freedom brake configuration to a dynamic multi-degree-of-freedom configuration. The electrical conductor is allowed to move independently in multiple directions (radial and axial movements) relative to the magnetic array, enabling the brake to dynamically adjust its braking characteristics and provide smooth torque regulation across varying operating conditions.
Solution Approach 2:
The patent implements another dimension by adding a second degree of freedom to the brake system. While the first degree of freedom provides rotational braking, the second degree of freedom (axial movement of the electrical conductor) enables modulation of the braking action, transforming the brake from a single-function device to a multi-functional system capable of continuous torque regulation.
2Ease of operation
If single degree of freedom eddy current brake configurations are used, then the ease of operation is improved, but the braking smoothness and control precision deteriorate
Solution Approach 1:
The dynamic configuration allows the electrical conductor to automatically adjust its position in response to varying torque demands. The conductor's independent movements enable it to optimally position itself within the magnetic field, providing precise braking control without requiring complex external control mechanisms, thus maintaining ease of operation while achieving high control precision.
Solution Approach 2:
The multi-degree-of-freedom configuration enables the brake to self-regulate its braking torque through the natural movements of the electrical conductor. The conductor automatically adjusts its radial and axial positions in response to load variations, providing self-service torque regulation that maintains precise braking control without requiring external control systems.
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 a broader range of torque regulation and prevents on/off braking, enabling controlled and near-constant braking rates across different input conditions, enhancing the stability and smoothness of the braking process.
Implementation Method 1
Eddy current brake configurations work on the principle that an electrically conductive element moving relative to a magnetic field induces eddy current forces that act to resist relative movement between the magnetic field and electrical conductor
Implementation Method 2
an electrically conductive element moving relative to a magnetic field induces eddy current forces
Data Source
AI summary
Described herein are eddy current brakes and associated methods of their use, particularly configurations that have a kinematic relationship with at least two rotational degrees of freedom used to tune operation of the brake or apparatus in which the brake is located.