Portable AC Generator Spring Alternator Grid Independence
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Solution Overview
Problem
There is a need for a portable and efficient apparatus that can supply alternating current (AC) in the absence or disruption of commercially available AC from the public power grid, capable of powering various electrical devices such as air conditioners, computers, and televisions.
Innovation Solution
A portable apparatus that utilizes a combination of a spring and shaft mechanism to energize an alternator, generating AC, which is then converted to DC using a semiconductor and stored in batteries, with an inverter providing AC output, and includes a control module to manage energy flow and supplemental energy sources like the public grid, solar, or manual input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a portable apparatus uses a spring and shaft mechanism to energize an alternator for generating AC, then the apparatus can supply power in absence of grid electricity, but the device complexity increases due to multiple energy conversion components
Solution Approach 1:
The patent combines multiple energy conversion functions (mechanical to electrical via alternator, AC to DC via semiconductor, DC to AC via inverter) into a single integrated portable apparatus. The spring mechanism, alternator, semiconductor converter, batteries, and inverter are merged into one cohesive system that can operate independently of the grid, resolving the contradiction by accepting controlled complexity to achieve grid independence.
Solution Approach 2:
The apparatus is designed to perform multiple functions: generating AC power through the alternator, converting to DC for battery storage, and inverting back to AC for various loads. This multi-functionality allows a single device to handle different power requirements and operating conditions, improving adaptability while managing complexity through integrated design.
2Duration of action of stationary object
If the apparatus includes batteries for energy storage and multiple conversion components, then continuous power supply is achieved, but the weight and portability are compromised
Solution Approach 1:
The patent specifies using LiFePO4 (lithium iron phosphate) batteries, which offer a favorable energy density and weight characteristics compared to traditional lead-acid batteries. This parameter change in battery chemistry allows for extended operation duration while minimizing the weight penalty, directly addressing the contradiction between storage duration and portability.
3Productivity
If the apparatus uses AC motor to wind the spring and semiconductor to convert AC to DC, then energy management is improved, but the loss of energy increases during multiple conversion processes
Solution Approach 1:
The control module continuously monitors the system state and provides feedback to optimize energy management. It determines when to charge batteries from the alternator, when to discharge to power loads, and when to engage the AC motor to wind the spring. This feedback control maximizes productivity by making intelligent decisions about energy flow, while minimizing losses by avoiding unnecessary conversions and optimizing operational timing.
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
The apparatus effectively powers a range of electrical devices, providing reliable AC supply even in the absence of grid power, with LiFePO4 batteries offering durability and long energy storage, and supplemental energy sources ensuring continuous operation.
Implementation Method 1
a spring adapted for storing and delivering mechanical energy to the first shaft that rotates the first gear combination to energize an alternator
Implementation Method 2
first shaft that rotates the first gear combination to energize an alternator, thereby generating AC
Implementation Method 3
a semiconductor converting AC to direct current (DC)
Implementation Method 4
one or more batteries connected with the semiconductor
Implementation Method 5
an inverter connected with: i) the one or more batteries; ii) an AC outlet supplying AC
Implementation Method 6
an AC motor adapted to energize a second gear combination
Data Source
AI summary
An apparatus supplying alternating current to a load.