Series-Connected Flywheel Interconnections for Low-Load Inertia Amplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems require high inrush current and input driving force to initiate rotation of massive flywheels, which can be inefficient due to the need for substantial initial force, and there is a need to increase rotational kinetic energy while minimizing the increase in input load.
Innovation Solution
The configuration of multiple flywheels connected in series via chains or belts, where each flywheel's moment of inertia is amplified through a lever arm mechanism, allowing for increased mass and energy storage with minimal impact on the input load, by leveraging the mechanical advantage of the R/r ratio and the parallel axis theorem.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a massive flywheel is used to increase rotational kinetic energy, then energy storage capacity increases, but high inrush current and input driving force are required to initiate rotation
Solution Approach 1:
The system divides the flywheel into multiple segments (first flywheel, second flywheel, third flywheel) connected in series. Each segment contributes to the total moment of inertia but can be accelerated sequentially rather than requiring all mass to be accelerated simultaneously, reducing the peak input driving force requirement.
Solution Approach 2:
The second flywheel acts as an intermediary between the first and third flywheels. It receives rotational energy from the first flywheel via rim-to-rim connection and transfers it to the third flywheel via axle-to-axle connection, enabling gradual energy transfer and reducing the force burden on the input driver.
2Use of energy by moving object
If multiple flywheels are connected in series to amplify moment of inertia, then rotational kinetic energy increases, but system complexity increases
Solution Approach 1:
Each flywheel in the series connection serves multiple functions: the first flywheel stores energy and drives the second; the second flywheel stores energy, acts as a speed reducer via IMA, and drives the third flywheel; the third flywheel provides the final amplified moment of inertia. This multi-functionality reduces the need for separate components.
Solution Approach 2:
The patent combines multiple flywheels into a single integrated system where their moments of inertia are additive (I_total = I1 + I2 + I3). By merging these components through series connection, the system achieves amplified rotational kinetic energy storage capacity while sharing common structural and control infrastructure.
3Use of energy by moving object
If flywheel mass is increased to amplify moment of inertia, then energy storage increases, but load on input driver increases
Solution Approach 1:
The system uses dynamic connections between flywheels where the second flywheel's dual connection method (rim-to-rim from first, axle-to-axle to third) creates different mechanical advantage ratios at different stages. This dynamic transmission allows the system to achieve high moment of inertia without proportionally increasing the input load, as the IMA=R/r relationship modulates the force transmission.
Solution Approach 2:
The patent changes the connection parameters between flywheels - using rim-to-rim connection for the first to second flywheel and axle-to-axle connection for the second to third flywheel. This parameter change enables the system to achieve moment of inertia amplification while controlling the input load through the mechanical advantage provided by the different connection geometries.
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 significantly increases the rotational kinetic energy output while maintaining a relatively unchanged input driving force, allowing for the efficient transfer of energy to drive generators or heavier loads, with the mass of subsequent flywheels increasing proportionally to the moment of inertia.
Implementation Method 1
The second flywheel provides a wheel-and-axle driven by chain or belt offering ideal mechanical advantage (IMA)=R/r, where R is radius of this second flywheel, and r is radius of axle (drive shaft)
Implementation Method 2
Since moment of inertia has just mass (kg) of an area of radius R{circumflex over ( )}2 (meter squared), once it is in motion, it stays in motion
Implementation Method 3
combined moment of inertia increases based on parallel axis theorem of point mass by M(R+R){circumflex over ( )}2, where R+R represents two flywheels in series
Implementation Method 4
This means the third flywheel mass can be increased to 50 times of the first or second flywheel. If R=0.5, M=1, and R/r=10, then it becomes 5MR{circumflex over ( )}2*(R/r)=12.5
Data Source
AI summary
Balanced and round mass of an object, herein called as a flywheel, has moment of inertia at the center of mass that is Icom=½ MR{circumflex over ( )}2, where M=mass R=radius. At the rim of mass the moment of inertia is, Irim=Icom+MR{circumflex over ( )}2= 3/2MR{circumflex over ( )}2. This shows three times more in moment of inertia at the end of R. Transferring this increased moment of inertia to the next flywheels for further increase and applying wheel-and-axle moment arm is the core of this invention.