Composite Piston Magnet Layout for Higher Generator Flux
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing engine-generator designs with integrated linear electric generators suffer from inefficient magnetic flux generation due to the placement of permanent magnets on the sides of piston rods, limiting the electromotive force produced, and require complex assembly processes.
Innovation Solution
A composite piston design with symmetrically placed permanent magnets on piston rods, oriented along the common longitudinal axis, allowing easy assembly and maximizing magnetic flux through generator windings, featuring a slider groove and piston pins for alignment and stress reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If permanent magnets are placed on the sides of piston rods, then the structure is simpler, but the magnetic flux generation efficiency is limited
Solution Approach 1:
The patent transitions from placing magnets on the lateral sides of piston rods to positioning them at the end faces along the longitudinal axis. This dimensional change allows the magnetic field to be generated in the direction of piston movement, maximizing flux through the generator windings while maintaining assembly simplicity through the stepped structure and retaining nut.
2Device complexity
If the opening in generator windings is made smaller to fit piston rods, then the assembly sequence is constrained, but the magnetic flux efficiency is reduced
Solution Approach 1:
The patent enables preliminary assembly of the composite piston with magnets and piston rods before installing into the engine. The stepped structure on the piston rod allows the magnet to be pre-positioned and secured with a retaining nut, creating a modular unit that can be assembled independently and then integrated into the larger engine system, eliminating the need for complex in-situ assembly.
3Power
If magnets are oriented with poles along the longitudinal axis, then magnetic flux is maximized, but the assembly precision requirements increase
Solution Approach 1:
The patent applies local quality by creating a stepped structure specifically on the piston rod where the magnet is positioned. This localized geometric feature provides a dedicated mounting surface with defined orientation, ensuring that the magnet's polar axis aligns precisely with the longitudinal axis of the piston rod and cylinder, thereby maximizing magnetic flux generation while concentrating the precision requirement at a specific location rather than throughout the entire assembly.
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
Enhances magnetic flux generation efficiency and simplifies the assembly process by enabling magnets to be mounted before installation, improving electrical energy production and reducing mechanical stresses.
Implementation Method 1
the magnets integrated into the piston rods move through the windings of the generator and generate a variable magnetic flux in said windings, which in turn generates an electric current
Implementation Method 2
the permanent magnets integrated into the piston rods are on the sides of the piston rods and therefore the magnetic field generated by them when moving through the stationary windings to generate electromotive force
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a composite piston for an engine-generator with slotted link mechanism. The composite piston comprises each symmetrically on the opposite sides of a middle section (1) with a slider slot (4) on a common longitudinal axis two piston rods (2), pistons (3) and at least one permanent magnet (10). On the side of the middle section (1) each piston rod (2) has a step (6) on which the permanents are placed having their south and north poles laying in the direction of the said common longitudinal axis and which are fixed to the piston rod (2) by a retaining nut (9) on the piston rod (2) so that the permanent magnets (10) are positioned between said retaining nut (9) and the middle section (1) of the piston rod (2).