Variable Inductance Oscillating Circuit for Vehicle Power Amplification
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Solution Overview
Problem
The existing electrical distribution network in motor vehicles faces challenges such as significant voltage drops during high-power component activation, leading to insufficient voltage supply for control electronics and reduced battery service life due to high current demands, and the compromise between energy and power density in battery design, resulting in suboptimal performance.
Innovation Solution
A dual electrical energy storage system comprising a battery for low-intensity, long-duration power and a supercapacitor for high-intensity, short-duration power, with an amplifier using an oscillating circuit to amplify current from the battery to the supercapacitor, eliminating substantial current demand from the battery and optimizing energy and power density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single battery is designed to supply both low current for several hours and high current for short periods, then the battery must compromise between energy density and power density, but this results in suboptimal performance and large mass
Solution Approach 1:
The electrical energy storage system is segmented into two separate units: a first battery optimized for energy density (low current, long duration) and a second battery optimized for power density (high current, short duration). Each battery is designed independently for its specific function, eliminating the need for compromise in a single battery design.
Solution Approach 2:
The system dynamically switches between different energy storage units based on power demand requirements. The control unit determines whether to draw from the first battery, second battery, or both simultaneously, optimizing performance for varying load conditions.
2Power
If high current is drawn from the battery during transitory phases, then the high-power component can be activated, but this causes significant voltage drop affecting other components and reducing battery service life
Solution Approach 1:
A DC-DC converter is introduced as an intermediary device between the two batteries. This converter manages power transfer and current distribution, allowing the first battery to supply current while the DC-DC converter amplifies or conditions it for the high-power component, preventing direct high current draws from the first battery that would cause voltage drops.
Solution Approach 2:
The system segments the power supply paths so that the first battery serves low-power components while the second battery (or combined system via DC-DC converter) serves high-power components. This separation prevents high current demands from affecting the voltage stability of the first battery and connected components.
3Productivity
If the inductance value is varied at a frequency equal to the own frequency of the oscillating circuit, then the current amplitude increases exponentially, but this requires precise frequency control
Solution Approach 1:
The system varies the inductance value of the inductive assembly as a dynamic parameter to achieve current amplification. By controlling the inductance variation frequency to match the oscillating circuit's own frequency, the system achieves exponential current increase without requiring complex external frequency control mechanisms.
Solution Approach 2:
The oscillating circuit generates its own oscillation frequency based on its L and C values. The control system detects this inherent frequency and synchronizes the inductance variation to match it, allowing the system to self-regulate without requiring external frequency references or complex control algorithms.
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 solution prevents voltage drops and extends battery life by isolating high-demand currents from the battery, allowing for improved voltage supply to other components and optimizing energy and power density without the limitations of traditional battery design.
Implementation Method 1
the oscillating circuit having its own pulsation ω such that ω=1/√(L′×C′) and its own frequency f such that f=ω/(2Π), and in that the value of the inductance is variable in a predetermined manner, in particular such as to increase an electric current supplied by the first electrical energy storage unit to the oscillating circuit into an amplified current supplied by the oscillating circuit to the second electrical energy storage unit
Implementation Method 2
An alternator transforms part of the mechanical energy of the thermal engine into electrical energy in order to recharge the battery
Data Source
AI summary
The present invention relates to a device (10) for powering a rotating electrical machine (13) of a motor vehicle, comprising: —an amplifier (15) capable of being electrically powered by the first electrical energy storage unit (11) and capable of electrically powering the second electrical energy storage unit (12), characterised in that the amplifier (15) comprises an oscillating circuit (16), the oscillating circuit (16) comprising a capacitance (C) of value C′ and an inductive assembly comprising an inductance (L) of value L′ and a resistance (R) of value R′, —the oscillating circuit (16) having a specific angular frequency ω such that ω=I/√(L′×C′) and a natural frequency f such that f=ω(2π), and in that the value of the inductance (L) is variable in a predetermined manner, in particular so as to increase an electric current, supplied by the first electrical energy storage unit (11) to the oscillating circuit (16), into an amplified current supplied by the oscillating circuit (16) to the second electrical energy storage unit (12).