Linear Motor Asymmetrical Magnet Configuration Vibration Suppression
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Solution Overview
Problem
Conventional linear motors experience vibration issues due to magnetic attraction force fluctuations when the mover's displacement position shifts from a reference position, requiring complex and costly support mechanisms to mitigate these vibrations.
Innovation Solution
The linear motor design incorporates an asymmetrical configuration between the armature and field magnet sections, ensuring that the magnetic attraction force remains constant in one direction throughout the movable range, reducing the need for complex support mechanisms by maintaining a consistent force direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a support mechanism is designed to reduce the movable range of the mover to suppress vibration, then vibration suppression is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies asymmetry by configuring the permanent magnets with different magnetic pole arrangements on opposite sides of the mover. Specifically, one side has magnets arranged to attract the mover while the other side has magnets arranged to repel the mover, creating an asymmetric magnetic field configuration that maintains unidirectional magnetic attraction force throughout the movable range, thereby suppressing vibration without requiring complex support mechanisms
2Force
If the mover displacement position shifts from the reference position, then magnetic attraction force cancellation is improved at the reference position, but vibration increases due to force direction switching
Solution Approach 1:
The asymmetric configuration of permanent magnets ensures that the magnetic attraction force acts in a consistent direction throughout the entire movable range. By having different magnetic pole arrangements on opposite sides (attractive on one side, repulsive on the other), the system prevents the force direction from switching even when the mover displaces from the reference position, thereby eliminating the vibration caused by frequent force direction changes
3Stability of the object's composition
If symmetrical arrangement of permanent magnets is used, then magnetic field balance is improved, but magnetic attraction force direction switches causing vibration
Solution Approach 1:
The patent deliberately introduces asymmetry in the magnetic field configuration to solve the vibration problem. While the physical arrangement of magnets may appear symmetrical, the magnetic pole arrangements are asymmetric (attractive poles on one side, repulsive poles on the other), creating an asymmetric magnetic force field that maintains consistent force direction and prevents vibration caused by force direction switching
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 design effectively suppresses vibration in the linear motor by maintaining a consistent magnetic attraction force direction, simplifying the support mechanism and reducing costs.
Implementation Method 1
a field magnet that includes a permanent magnet generating a magnetic field for the armature
Implementation Method 2
a magnetic attraction force remains constant in one direction throughout the movable range
Data Source
AI summary
A linear motor includes an armature that includes a coil and a core made of a soft magnetic material, and a field magnet that includes a permanent magnet generating a magnetic field for the armature. One of the armature or the field magnet is a mover and the other of the armature or the field magnet is a stator, and the stator includes a first section and a second section. The armature and the field magnet are arranged such that the mover is interposed between the first and second sections, and at least one of the armature or the field magnet is configured to have an asymmetrical property between first and second magnetic actions. The first magnetic action is caused by the permanent magnet between the mover and the first section, and the second magnetic action is caused by the permanent magnet between the mover and the second section.