Magnetic Transmission Linear Positioning Platform
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Solution Overview
Problem
Existing linear positioning platforms, primarily using rotating motors and ball screws, suffer from poor accuracy, slow speed, large volume, and poor stability, limiting their application in high-speed and high-precision manufacturing and testing.
Innovation Solution
A linear positioning platform and system based on magnetic transmission, utilizing a moving magnetic linear motor module and magnetic transmission linear positioning module with alternately distributed motor and mover poles, and a magnetic scale for displacement measurement, to achieve high-speed and high-precision positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rotating motor and ball screw method is used, then positioning platform can be implemented, but response speed is slow and accuracy is poor
Solution Approach 1:
The patent replaces the traditional mechanical ball screw transmission system with a magnetic transmission system using permanent magnets and magnetic poles. This substitution eliminates mechanical contact and friction, enabling direct magnetic field-driven motion that achieves both high response speed and high positioning accuracy without the limitations of mechanical creep and inertia.
Solution Approach 2:
The patent extracts and removes the ball screw mechanical transmission component from the system, replacing it with a pure magnetic field transmission mechanism. This extraction eliminates the inherent limitations of ball screw systems (creep, mechanical backlash) while maintaining the positioning function through magnetic field interaction between permanent magnets and magnetic poles.
2Volume of moving object
If rotating motor and ball screw method is used, then positioning function is achieved, but volume is large
Solution Approach 1:
The patent replaces the bulky mechanical ball screw transmission system with a compact magnetic transmission system. The magnetic field transmission requires no mechanical gears, screws, or linkages, significantly reducing the moving volume while enabling higher positioning speeds through direct magnetic actuation of the platform.
3Stability of the object's composition
If rotating motor and ball screw method is used, then positioning is achieved, but stability is poor
Solution Approach 1:
The patent replaces the mechanical ball screw system with a magnetic transmission system that eliminates mechanical contact points prone to wear, backlash, and creep. The magnetic field-based transmission provides stable and repeatable positioning by relying on consistent magnetic field interactions rather than mechanical tolerances, thereby improving both stability and accuracy.
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 magnetic transmission platform offers low cost, compact structure, high permanent magnet utilization, high speed, and high precision, significantly enhancing the performance of related fields.
Implementation Method 1
a stator coil fixedly installed on the base, a first yoke slidably installed on the base and located above the stator coil, and motor poles installed below the first yoke, and there is a gap between the stator coil and the motor pole
Implementation Method 2
a magnetic transmission linear positioning module includes first mover poles installed above the first yoke, a magnetizing skeleton with a plurality of gaps fixedly installed on the base and located above the first yoke, a plurality of magnetizing blocks embedded in the gaps on the magnetizing skeleton
Implementation Method 3
there is a gap between the first mover pole and the magnetizing block and also between the magnetizing block and the second mover pole
Data Source
AI summary
A linear positioning platform and a linear positioning system based on magnetic transmission are disclosed. The linear positioning platform includes a moving magnetic linear motor module and a magnetic transmission linear positioning module. The moving magnet linear motor module includes a base, a stator coil, a first yoke, and motor poles. There is a gap between the stator coil and motor pole. The magnetic transmission linear positioning module includes first mover poles, a magnetizing skeleton, a plurality of magnetizing blocks, a second yoke, and second mover poles. There is a gap between the first mover pole and magnetizing block and also between the magnetizing block and second mover pole. The linear positioning platform and linear positioning system have the characteristics of low cost, compact structure, high utilization rate of permanent magnets, high speed, high precision, high dynamic response, etc., which greatly promotes the development of related fields.