Audio Amplifier Power Switching for Instantaneous Peak Load
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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 and switch mechanism that controls charging of a secondary battery and switches the power source between an external power supply and the secondary battery based on power consumption levels, ensuring continuous operation by using the secondary battery when external 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 short-term power demands, but it cannot handle high-frequency instantaneous power demands due to limited storage capacity
Solution Approach 1:
The secondary battery is charged in advance during periods of low power consumption to store energy, so that it can provide power during instantaneous high consumption periods. This preliminary energy storage action enables the system to handle high-frequency power demands that a capacitor alone cannot satisfy.
Solution Approach 2:
The external power supply serves dual functions: it provides power during normal operation and simultaneously charges the secondary battery during low consumption periods. This multi-functionality allows the system to use the same power source for both immediate power needs and energy storage, eliminating the need for a separate power source.
2Power
If the rated output of the external power supply is determined according to instantaneous high output, then the device can handle peak power demands, but the average power consumption capability is underutilized
Solution Approach 1:
The system operates in periodic cycles, alternating between charging the secondary battery during low power consumption periods and discharging during high power consumption periods. This periodic charge-discharge action enables efficient energy utilization by matching power supply capacity with actual demand patterns over time.
3Reliability
If a secondary battery is added to switch between power sources, then continuous operation during high power consumption is achieved, but device complexity increases
Solution Approach 1:
The control unit automatically monitors power consumption levels and autonomously switches between power sources without user intervention. The system self-manages the complexity of the switching mechanism by implementing automatic detection and control, reducing the need for complex manual control interfaces while maintaining reliable continuous operation.
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 device ensures continuous sound signal amplification by switching to the secondary battery power source when external power supply limits are reached, preventing interruptions and maintaining output even during high power consumption scenarios.
Implementation Method 1
a secondary battery unit configured to store power
Data Source
Figure 1
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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.