Resonant Drive Circuit Phase Offset for Lower Excitation Power
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Solution Overview
Problem
Resonant systems face challenges in maintaining stability due to component characteristics that drift with time, age, and temperature, particularly in controlling resonant modes and managing excitation signals to keep systems resonating at specific frequencies.
Innovation Solution
A drive circuit with feedback loops and a phase lock loop is used to modify the excitation signal amplitude and phase, employing automatic gain control and a drive amplitude reduction circuit to maintain constant feedback signal amplitude while reducing excitation signal amplitude, utilizing a gradient descent algorithm to adaptively adjust the phase and minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If feedback control circuit is used to maintain resonant frequency, then resonant stability is improved, but power consumption increases due to high excitation signal amplitude
Solution Approach 1:
The patent changes the phase parameter of the excitation signal to optimize resonant efficiency. By adjusting the phase offset dynamically, the system achieves stable resonant operation at lower excitation amplitudes, thereby reducing power consumption while maintaining resonant stability.
Solution Approach 2:
The patent employs feedback control circuits that monitor resonant response and dynamically adjust the excitation signal phase and amplitude. This feedback mechanism enables the system to maintain optimal resonant conditions with minimized power consumption by continuously adapting to system variations.
2Measurement precision
If excitation signal amplitude is increased to maintain resonant mode, then resonant frequency tracking is improved, but power consumption increases
Solution Approach 1:
The patent optimizes the phase parameter of the excitation signal to improve frequency tracking precision. By dynamically adjusting the phase offset based on resonant response, the system achieves accurate frequency tracking with reduced excitation amplitude, thereby lowering power consumption.
3Stability of the object's composition
If component drift and temperature variations are compensated, then resonant stability is improved, but system complexity increases
Solution Approach 1:
The patent uses feedback control circuits that automatically compensate for component drift and temperature variations by monitoring resonant response and adjusting excitation parameters. This feedback mechanism maintains resonant stability without requiring complex manual compensation systems.
Solution Approach 2:
The system performs self-compensation for environmental variations and component drift through automatic phase and amplitude adjustment based on real-time resonant response monitoring, eliminating the need for external calibration or complex compensation mechanisms.
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 approach ensures stable resonant motion with reduced power consumption and increased efficiency by maintaining constant feedback signal amplitude, minimizing the impact of component drift and temperature variations, and optimizing resonant frequency tracking.
Implementation Method 1
When trying to control a resonant system at a peak of a resonant mode, a feedback control circuit is commonly employed to produce an excitation signal in an attempt to keep the system resonating at a particular frequency
Data Source
AI summary
A drive circuit for a resonant system provides an excitation signal having an amplitude and a phase. The resonant system provides a feedback signal representing an oscillation amplitude. The amplitude of the excitation signal is reduced for a substantially constant feedback signal amplitude by modifying the excitation signal phase.