Linear Compressor Inner Stator Flux and Lead-Out Guide
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Solution Overview
Problem
Existing linear compressors face inefficiencies due to limited flux generation and complex power line lead-out structures, which hinder the effective operation of the linear motor and refrigerant compression process.
Innovation Solution
The design incorporates an improved lead-out guide device for power lines using a magnetic body made from pure iron powder, integrated with a nonconductive material and insulation coating, allowing for efficient flux flow and simplified assembly, and positions the inner stator outside the cylinder with a center and side core configuration to enhance flux generation and power line exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the distance from the center of the linear motor to the permanent magnet is increased to increase flux generation, then the flux amount increases, but the motor structure becomes more complex and the power line lead-out becomes more difficult
Solution Approach 1:
The patent transitions from a conventional radial flux configuration to an axial flux configuration by arranging the permanent magnets and stator cores in a planar arrangement with flux flowing axially through the air gap. This dimensional change allows increased flux path length without proportionally increasing motor radius, resolving the contradiction between flux generation and structural complexity.
Solution Approach 2:
The motor is divided into modular components including multiple U-shaped stator cores, permanent magnets arranged in alternating polarity patterns, and segmented yokes. This segmentation allows independent optimization of each component and simplifies the lead-out of power lines through the modular structure, while maintaining high flux generation capability.
2Ease of manufacture
If a conventional power line lead-out structure is used, then the power line can be connected, but the structure becomes complex and insulation is compromised
Solution Approach 1:
The patent introduces an insulating plate as an intermediary component between the conductive parts (stator cores and permanent magnets) and the power line lead-out path. This insulating plate provides both mechanical support and electrical insulation, allowing simple power line connection while maintaining insulation reliability.
Solution Approach 2:
The patent uses thin insulating coatings and flexible insulating materials to wrap and protect power lines where they pass through or near conductive components. This thin film approach provides effective insulation without adding significant structural complexity or interfering with the compact motor 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
This configuration enhances flux efficiency, simplifies the lead-out process, and improves insulation, resulting in increased motor efficiency and reduced mechanical losses, while maintaining a compact and efficient refrigerant compression system.
Implementation Method 1
The permanent magnet may be linearly reciprocated by an electromagnetic force between the permanent magnet and the inner (or outer) stator
Implementation Method 2
The guide device may comprise a magnetic body manufactured by using power metallurgy or powder sintering
Data Source
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AI summary
Provided is a linear compressor. The linear compressor includes a cylinder defining a compression space for a refrigerant, a piston reciprocated in an axis direction within the cylinder, and a linear motor providing power to the piston. The linear motor includes an inner stator disposed outside the cylinder, the inner stator including a center core and a side core disposed on at least one side of the center core, an outer stator disposed to be spaced outward from the inner stator in a radius direction, and a permanent magnet movably disposed in an airgap defined between the inner stator and the outer stator. The side core includes a core body and a lead-out guide device coupled to the core body to expose or lead out a power line to the outside of the side core.