Leaf-Spring Armature Suspension for Friction-Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electromagnetic machines with moving armatures suffer from energy losses due to friction and parasitic movements, which affect their efficiency and service life.
Innovation Solution
An electromagnetic machine design featuring a stator and a mobile armature connected by leaf springs that extend on one side of the air-gap plane, allowing translational movement while generating an elastic return force, thereby minimizing friction and preventing transverse movements, thus reducing energy losses and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If guideways and helical springs are used to guide the armature movement, then the armature can move with respect to the stator, but friction occurs between contacting parts causing energy losses
Solution Approach 1:
The patent replaces traditional mechanical guideways and helical springs with a magnetic field-based suspension system. The armature is suspended magnetically between the stator poles, eliminating physical contact and friction. The magnetic field provides both the guiding function and the restoring force, substituting mechanical contact with field-based interaction.
Solution Approach 2:
The patent employs a magnetic field as a non-contact medium to achieve armature guidance and suspension, analogous to how pneumatic or hydraulic systems use fluid media. The magnetic field acts as the intermediary that transmits force without physical contact, reducing friction and energy losses.
2Productivity
If the armature is allowed to move freely with respect to the stator, then the machine can operate, but parasitic movements occur that reduce efficiency
Solution Approach 1:
The patent applies localized magnetic fields between specific stator poles and the armature to control movement in specific directions. The magnetic suspension system provides directional control by creating asymmetric magnetic force distributions, allowing productive movement while constraining parasitic movements through localized field gradients.
Solution Approach 2:
The patent uses dynamic magnetic field control to maintain armature position and guide movement. By adjusting the magnetic field strength and distribution in real-time, the system adapts to armature position changes, providing continuous stabilization that prevents parasitic movements while allowing intended motion.
3Strength
If leaf springs are used to connect the armature to the stator, then mechanical connection is provided, but mechanical tension causes wear and reduces service life
Solution Approach 1:
The patent replaces mechanical leaf spring connections with a magnetic field-based suspension system. The magnetic field provides the connecting and restoring force without physical contact between the armature and stator, eliminating mechanical wear while maintaining connection strength and functionality.
Solution Approach 2:
The magnetic field serves as an intermediary between the armature and stator, transmitting mechanical force without direct contact. This intermediate magnetic medium allows the system to maintain strong mechanical connection equivalent to leaf springs while avoiding the wear and friction inherent in direct mechanical contact.
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 enhances energy efficiency and extends the service life of the machine by minimizing mechanical tension in the leaf springs and preventing parasitic movements, leading to improved performance and reduced wear.
Implementation Method 1
each leaf spring comprising at least one elastic leaf that is deformable in bending
Implementation Method 2
this first coil being arranged around a portion of the first magnetic core
Implementation Method 3
the mobile armature bearing permanent magnets
Data Source
AI summary
An electromagnetic machine includes a stator, a movable armature and a device for mechanically connecting the movable armature to the stator. The connecting device includes a plurality of leaf springs. The stator includes at least one first electrical coil and at least one first magnetic core forming at least one open loop between first and second terminal ends of said first loop in order to define an air gap between said terminal ends. The plurality of leaf springs extends on a single side of an air gap plane perpendicular to a first loop plane. The plurality of leaf springs is arranged so as to authorise the translation of the movable armature in relation to said stator in a direction that is perpendicular to the loop plane and to prohibit any movement of said movable armature in any direction within said loop plane.