Linear Motor Flux Sharing via Inverted Pole Magnetization
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Solution Overview
Problem
Existing linear motors face challenges in miniaturization and effective magnetic flux sharing between adjacent magnetic poles, leading to increased size and magnetic attractive force due to identical polarity magnetic fluxes.
Innovation Solution
A linear motor design featuring alternating magnetization direction of permanent magnets and the use of dual magnetic pole teeth with linked magnetic materials and staggered winding orientations to create multiple flux paths, reducing magnetic saturation and attractive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If magnetic fluxes generated by windings are identical in polarity at plural pieces of magnetic poles, then leakage fluxes between magnetic poles are reduced, but device size increases and effective magnetic fluxes cannot be shared between adjacent magnetic poles
Solution Approach 1:
The patent applies local quality by creating different magnetic flux paths for different regions. Specifically, even-order magnetic poles generate magnetic flux that passes through odd-order magnetic poles via magnetic materials, while odd-order magnetic poles generate magnetic flux that passes through even-order magnetic poles. This localized differentiation allows effective flux sharing between adjacent poles while maintaining reduced leakage flux, resolving the contradiction between energy loss reduction and device size minimization.
2Loss of energy
If interval between magnetic poles increases to reduce leakage flux, then device size increases, but effective magnetic flux sharing between adjacent poles deteriorates
Solution Approach 1:
The patent introduces magnetic materials as intermediary components between adjacent magnetic poles. These magnetic materials serve as mediators that guide and transfer magnetic flux from one pole to adjacent poles, enabling effective flux sharing even when pole intervals are increased. This intermediary mechanism allows the system to maintain productivity while reducing leakage flux, as the magnetic materials facilitate controlled flux paths between poles.
3Loss of energy
If identical polarity magnetic fluxes are used at adjacent magnetic poles, then leakage flux is reduced, but magnetic attractive force between armature and mover increases
Solution Approach 1:
The patent inverts the conventional approach by making adjacent magnetic poles have opposite effects on magnetic flux generation. Even-order magnetic poles generate flux that passes through odd-order poles, while odd-order poles generate flux that passes through even-order poles. This inverted relationship creates alternating flux patterns that reduce magnetic attractive force between armature and mover while simultaneously reducing leakage flux, resolving the contradiction between force reduction and energy loss reduction.
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 enables miniaturization of the linear motor while sharing effective magnetic fluxes between poles, reducing magnetic attractive force and enhancing thrust efficiency.
Implementation Method 1
windings disposed on the first magnetic pole tooth and the second magnetic pole tooth, respectively... magnetic flux from each of the windings to pass therethrough... produces thrust for causing the mover and the armatures to make a relative horizontal movement
Implementation Method 2
a magnetic material for linking the first magnetic pole tooth to the second magnetic pole tooth, thereby forming a path for a magnetic flux
Data Source
AI summary
A linear motor is capable of miniaturization of a device, sharing of effective magnetic fluxes between the magnetic poles adjacent to each other, and decreasing a magnetic attractive force acting between a mover and an armature, and a linear motor drive system. The linear motor includes a mover, formed by lining up a plurality of pieces of permanent magnets or magnetic materials while inversing a magnetization direction thereof, and an armature. First and second magnetic pole teeth are disposed in such a way as to vertically tuck the permanent magnet or the magnetic material. A magnetic material links the first magnetic pole tooth to the second magnetic pole tooth, thereby forming a path for a magnetic flux, and windings are disposed on the first magnetic pole tooth and the second magnetic pole tooth, respectively. At least two units of the armatures are lined to be linked to each other.