Pure Sine Wave Output Circuit for Stable Backup Lighting Power
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Solution Overview
Problem
Conventional power systems, especially those below 60 W, suffer from poor power stability and compatibility, often providing DC or square wave outputs, which are inadequate for high lighting demands and prone to power interruptions.
Innovation Solution
A constant-power pure sine wave output circuit comprising an AC-DC module, a charging module, a DC-DC boost module, a DC-AC output module, and an MCU module, where the MCU controls energy transfer from the charging module to the DC-DC boost module during power outages to maintain AC signal output, enhancing stability and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional power systems use DC or square wave output, then the device complexity is reduced, but the adaptability and power supply stability deteriorate
Solution Approach 1:
The patent transforms the power output parameter from DC or square wave to pure sine wave AC output. This parameter change enables the power system to meet diverse lighting requirements and improve compatibility while maintaining manageable device complexity through integrated circuit design
Solution Approach 2:
The power supply system is designed to provide multiple output types (DC and AC pure sine wave) from a single system, enabling it to adapt to different load requirements and application scenarios, thereby improving versatility without significantly increasing device complexity
2Device complexity
If conventional power systems operate without backup energy storage, then the device complexity is reduced, but the reliability and power supply stability deteriorate during power outages
Solution Approach 1:
The charging module continuously charges the energy storage module during normal power supply conditions, preparing energy in advance for potential power outages. This preliminary action ensures that the system can maintain reliable operation during emergencies without requiring complex real-time decision-making circuits
Solution Approach 2:
The energy storage module acts as an intermediary between the power input and output, buffering power fluctuations and providing continuous energy supply during outages. This intermediary component improves reliability while keeping the overall system structure manageable
3Ease of manufacture
If the power system uses simple DC output, then the manufacturing cost is reduced, but the adaptability to high lighting requirements and usage scenarios deteriorates
Solution Approach 1:
The system provides parameter flexibility by offering both DC and AC pure sine wave output modes, allowing selection based on specific application requirements. This parameter variability enables the system to meet high lighting demands while maintaining ease of manufacture through a unified circuit platform
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 provides stable AC power output, improving power supply stability and compatibility, enabling use in high lighting applications by converting stored energy into AC signals during emergencies and supporting a wide range of lighting requirements.
Implementation Method 1
an AC-DC module, configured to convert the mains AC signal into a first DC signal
Implementation Method 2
configured to filter the rectified signal to generate a first DC signal
Implementation Method 3
a charging module, configured to charge the energy storage module when the first DC signal is higher than a preset DC threshold
Implementation Method 4
a DC-DC boost module, configured to boost the second DC signal into a third DC signal
Implementation Method 5
a DC-AC output module, configured to convert the third DC signal into a first AC signal
Implementation Method 6
convert the third DC signal into a first AC signal and output it to a load
Data Source
AI summary
Provided are a constant-power pure sine wave output circuit, a device, and a power supply system. The circuit includes an AC-DC module, a charging module, a DC-DC boost module, a DC-AC output module, and an MCU module. The AC-DC module is electrically connected to the DC-DC boost module through the charging module, and the DC-DC boost module is electrically connected to the DC-AC output module. The MCU module is electrically connected to both the AC-DC module and the charging module. When there is a power outage, the first DC signal output by the AC-DC module will be lower than the preset DC threshold value, and the MCU module controls the charging module to transmit the second DC signal to the DC-DC boost module. Therefore, the circuit is capable of avoiding subsequent power outages, improving power supply stability, and meeting the requirements of applications with higher lighting demands.