Linear Motor Protective Member for Winding Misalignment
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Solution Overview
Problem
Existing linear motors face issues with the winding holding component deformation and lack of y-direction restraint, leading to potential damage from external forces and misalignment, which can result in reduced drive force due to magnetic pole tooth misalignment.
Innovation Solution
A linear motor design featuring a movable element with permanent magnets and armature magnetic pole teeth, a winding around the pole teeth, and an arm part extending in the right/left direction, with a protective member between the arm part and the movable element to prevent misalignment and deformation, ensuring the winding remains within the magnetic pole teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a winding holding component is used to support the winding, then the winding can be held in position, but the component may deform under external force or over time, causing the winding to come off
Solution Approach 1:
A protective member is introduced as an intermediary component between the arm part and the movable element. This protective member has a movable element facing surface that faces the movable element and is positioned inside the outer end of the winding, preventing direct contact and impact while maintaining winding support.
2Device complexity
If the movable element is allowed to move freely, then the motor structure is simple, but the movable element may touch the core due to vibration or external force, causing damage or reduced drive force
Solution Approach 1:
The protective member serves as a mediator between the movable element and the arm part/core. It prevents direct contact and impact while allowing the motor structure to remain relatively simple without requiring complex restraint mechanisms in all directions.
3Ease of operation
If the movable element is restrained by a roller bearing in the z direction, then movement in that direction is controlled, but there is no restraint in the y direction, allowing the movable element to touch the core during vibration
Solution Approach 1:
The protective function is segmented into different directional components: the roller bearing handles z-direction restraint while the protective member provides y-direction protection. This division allows each component to specialize in specific directional control without requiring a single complex restraint system.
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 solution effectively suppresses winding misalignment and deformation, maintaining drive efficiency by preventing the movable element from touching the arm part or core, thus enhancing the motor's stability and performance.
Implementation Method 1
A linear motor with a thrust generating mechanism has a shape like a cut-open rotary machine, in which a large magnetic attractive force is exerted between a movable element including a row of permanent magnets, and an armature
Data Source
AI summary
To provide a linear motor and device which suppress contact of a movable element with a core. The linear motor includes: a movable element having a permanent magnet; and an armature having magnetic pole teeth located in an up/down direction of the movable element, a winding wound around the magnetic pole teeth, and an arm part extending in a right/left direction of the movable element. The movable element and the armature make relative movement in a front/back direction. The linear motor includes a protective member which is located between the arm part and the movable element and in which a movable element facing surface facing the movable element is located inside an outer end of the winding.