Amplifier Power Source Switching for Peak Audio Load Stability
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Solution Overview
Problem
Existing sound signal output devices face challenges in managing instantaneous high power consumption that exceeds the capacity of external power supplies, leading to potential power output failures due to limited capacitor storage.
Innovation Solution
A sound signal output device with a charger to control secondary battery charging and a switch to alternate the power source between an external power supply and a secondary battery, ensuring continuous operation by switching to the secondary battery when input power exceeds a predetermined threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a capacitor is used to store power for instantaneous high output, then the device can cope with brief power demands, but it cannot handle cases where the frequency of high power consumption is high
Solution Approach 1:
The secondary battery is charged in advance during periods of low power consumption to store energy that can be quickly discharged when high power is needed. This preliminary energy storage action enables the system to handle frequent high power demands without requiring a large-capacity capacitor.
Solution Approach 2:
The secondary battery acts as an intermediary power source between the external power supply and the amplifier. It absorbs excess power when available and supplies power during high demand periods, mediating the power flow to ensure continuous reliable operation.
2Power
If the rated output of the external power supply is determined according to the instantaneous high output, then the device can handle peak power demands, but the average power consumption is much smaller leading to inefficiency
Solution Approach 1:
The power supply system dynamically adapts its output by switching between the external power supply and the secondary battery based on real-time power demands. The external power supply operates at optimal efficiency during average conditions, while the secondary battery supplements during peaks, eliminating the need for the external supply to be oversized.
Solution Approach 2:
The system changes the effective power supply parameters by switching between two different power sources. The external power supply provides power at its optimal operating point for average conditions, while the secondary battery provides variable power during high demand, optimizing overall energy efficiency.
3Weight of moving object
If a small and lightweight external power supply is used, then the device is more convenient to carry, but it cannot provide sufficient power during instantaneous high output
Solution Approach 1:
The secondary battery is charged in advance during low power periods to prepare energy reserves. This allows the use of a lightweight external power supply while still having sufficient total power availability when needed, as the battery provides the supplemental power during high output demands.
Solution Approach 2:
The secondary battery serves multiple functions: it acts as a supplemental power source during high output demands, provides energy during external power supply failures, and enables the use of a lighter external power supply by offsetting its reduced capacity.
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 solution allows for continuous sound signal amplification by switching to the secondary battery when external power supply capacity is exceeded, preventing power failures and ensuring uninterrupted operation.
Implementation Method 1
a charger configured to control charging of a secondary battery using an input power from an external power supply
Data Source
AI summary
A sound signal output device includes: a charger configured to control charging of a secondary battery using an input power from an external power supply; and a switch configured to switch a power source of an amplifier, the amplifier being configured to amplify a sound signal, to select either the external power supply or the secondary battery. The switch is configured to switch the power source from the external power supply to the secondary battery in response to the input power exceeding a predetermined power due to an increase in power consumption of the amplifier in a state in which the external power supply is selected as the power source.