Compact Short-Stroke Linear Motor for Active Vibration Damping
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Solution Overview
Problem
Conventional linear motors for active vibration damping are often bulky, which can increase the vibrational tendency of inverse pendulum systems, and existing designs do not efficiently accommodate a high power output in a compact form without compromising performance.
Innovation Solution
A compact short-stroke linear motor design featuring a primary section with a planar coil brace and movable secondary section with magnet holders separated by spacers guided through openings in the primary section, allowing for a compact configuration without reducing performance, and incorporating non-ferromagnetic materials and carbon-fiber plates to manage heat and eddy currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional linear motors are used for active vibration damping, then vibration damping performance is achieved, but the device size becomes bulky
Solution Approach 1:
The motor is divided into a primary section with coil brace and a secondary section with magnet holders, separated by spacers. This segmentation allows for a more compact arrangement where the coil brace moves between the magnet holders rather than requiring the secondary section to wrap around the primary section, reducing overall device volume while maintaining vibration damping performance.
Solution Approach 2:
The patent transitions from a conventional wrapped configuration to a linear arrangement where the coil brace moves between magnet holders in a shortened stroke configuration. This dimensional reorganization reduces the device footprint while maintaining the necessary magnetic field interaction for vibration damping.
2Stability of the object's composition
If the secondary section wraps around the primary section, then structural stability is achieved, but device compactness is reduced
Solution Approach 1:
The secondary section is segmented into separate magnet holders that are positioned on opposite sides of the coil brace's movement path. These magnet holders are connected through spacers that are guided through openings in the primary section, providing structural stability without requiring the secondary section to wrap around the primary section, thus achieving compactness.
Solution Approach 2:
Spacers serve as intermediary elements that connect the magnet holders and are guided through openings in the primary section. This intermediary structure provides the necessary structural stability and guidance for the coil brace while maintaining a compact linear configuration instead of a wrapped arrangement.
3Power
If high motor power output is accommodated in limited volume, then power density is improved, but thermal management becomes more challenging
Solution Approach 1:
The motor components are segmented into distinct primary and secondary sections with spacers, creating a compact linear arrangement that accommodates high power output in limited volume. This segmentation allows for optimized placement of heat-generating coils and heat-dissipating structures in close proximity, improving power density while enabling effective thermal management through the compact design.
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
The design achieves a compact size without performance loss, effectively damping vibrations and reducing the vibrational tendency of inverse pendulum systems by accommodating high motor power output in a limited volume, while maintaining precise alignment and thermal management.
Implementation Method 1
a primary section having a planar coil brace and flat coils disposed in it, as well as a secondary section that is movable relative to the primary section and has magnet holders with magnets placed on both sides of the coil brace
Implementation Method 2
the spacers are guided through openings in the primary section
Data Source
AI summary
A linear motor for short strokes includes a primary section including a coil brace and coils disposed in it, as well as a secondary section that is movable relative to the primary section and has magnet holders with magnets placed on both sides of the coil brace. Spacers separate the magnet holders from each other such that the coil brace is movable between the two magnet holders. The spacers are guided through openings in the primary section.