Electrodynamic Apparatus Wireless Power and Gravity Alignment
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Solution Overview
Problem
Conventional electrodynamic apparatuses, such as robot hands, face limitations due to cables restricting the range of motion and causing interference, deterioration, and maintenance issues, particularly in rotating mechanisms and arm movements.
Innovation Solution
The implementation of a wireless power transmission system using power transmission and reception antennas between arms and supports, allowing for cable-free operation and reduced torque requirements by moving the center of gravity closer to the axis of rotation before rotating, thereby easing motion restrictions and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cables are used to supply electric power to rotating mechanisms and end effectors, then electric power can be transmitted reliably, but the range of motion of the end effector is restricted and cable interference occurs
Solution Approach 1:
The patent removes cables from the rotating mechanism and end effector, extracting the power transmission function to a fixed base station. This eliminates the physical constraint that limited the end effector's range of motion while maintaining reliable power supply through wireless transmission.
Solution Approach 2:
The patent replaces the mechanical cable-based power transmission system with a wireless power transmission system using electromagnetic fields. This substitution eliminates the mechanical constraints imposed by cables on the rotating mechanism and end effector movements.
2Duration of action of moving object
If cables are present in movable parts of arms, then electric power can be supplied continuously, but cable deterioration and maintenance issues occur
Solution Approach 1:
The patent extracts cables from movable parts of the arms, eliminating the source of cable deterioration and maintenance issues. Power is now supplied wirelessly from a fixed base station, removing the need for cable maintenance in moving components.
Solution Approach 2:
The patent substitutes the mechanical cable system with a wireless power transmission system, eliminating the physical wear and deterioration that occurs with cable movement while maintaining continuous power supply capability.
3Speed
If the second arm is rotated without moving the center of gravity to the axis of rotation first, then rotation can be performed directly, but the torque required increases
Solution Approach 1:
The patent applies preliminary action by moving the center of gravity of the second arm to the axis of rotation before performing rotation. This preparatory step reduces the moment arm and consequently the torque required for rotation, enabling faster and more efficient rotational movement.
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 solution enhances the range of motion, reduces the load on rotating mechanisms, and minimizes cable-related issues, such as interference and deterioration, while lowering maintenance frequencies.
Implementation Method 1
the power transmission antenna supplies electric power to the power reception antenna wirelessly
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3A~3B
AI summary
An electrodynamic apparatus includes a first arm extending in a first direction, a second arm supported by the first arm, a linear actuator that moves the second arm along the first direction with respect to the first arm, a support extending in a second direction that is different from the first direction and supporting the first arm, and a rotating mechanism that rotates the support about an axis of rotation parallel to the second direction. The first arm includes a power transmission antenna. The second arm includes a power reception antenna. The power transmission antenna supplies electric power to the power reception antenna wirelessly. In rotating the support, the linear actuator moves the center of gravity of the second arm to the axis of rotation first, and then the rotating mechanism rotates the support.