Emergency Power Supply Circuit With Boost Feedback for Stable Lighting
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Solution Overview
Problem
Emergency power supplies in existing systems suffer from poor adaptability and stability of output voltage, particularly in scenarios with high lighting requirements, leading to flickering or low brightness of lamps during prolonged power outages.
Innovation Solution
An emergency power supply circuit with a charging circuit, energy storage unit, main control unit, auxiliary power supply, boost circuit, and feedback mechanism to stabilize output voltage by boosting and regulating it in real time using a boost unit, feedback unit, and drive control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the energy storage device outputs a standard supply voltage, then the circuit structure is simple, but the output voltage cannot meet high lighting requirements and becomes unstable during prolonged power outages
Solution Approach 1:
The patent introduces a boost circuit with controllable switching elements (MOS tubes Q1-Q4) that dynamically adjust the output voltage based on real-time feedback from voltage sampling resistors (R1-R4). This dynamic adjustment mechanism allows the output voltage to adapt to different lighting requirements and maintain stability during prolonged power outages, resolving the contradiction between simple circuit structure and voltage stability.
Solution Approach 2:
The patent implements a feedback mechanism where voltage sampling resistors (R1-R4) continuously monitor the output voltage and feed this information back to the control circuit. The control circuit adjusts the switching duty cycle of the boost circuit based on this feedback to maintain stable output voltage, directly addressing the voltage stability issue while managing circuit complexity.
2Device complexity
If the energy storage device uses standard supply voltage, then the device complexity is low, but the adaptability to different lighting requirements is poor
Solution Approach 1:
The boost circuit with adjustable duty cycle enables the power supply to adapt to different lighting requirements by dynamically changing the output voltage level. The switching elements and control circuit work together to provide variable voltage output, enhancing adaptability without requiring multiple fixed-voltage power supply circuits.
Solution Approach 2:
The patent changes the output voltage parameter of the power supply circuit through the boost circuit's adjustable duty cycle. By varying the duty cycle, the output voltage can be adjusted to match different lighting requirements, providing versatility while maintaining a single power supply circuit structure.
3Duration of action of moving object
If the storage battery supplies power during prolonged grid faults, then the power supply duration is extended, but the output voltage becomes unstable causing flicker or low brightness
Solution Approach 1:
As the storage battery discharges during prolonged power outages, its voltage naturally drops. The boost circuit compensates for this by dynamically increasing its duty cycle to maintain stable output voltage. This dynamic compensation allows the system to extend power supply duration while preventing voltage instability, flicker, and brightness variations.
Solution Approach 2:
The feedback mechanism continuously monitors the output voltage during battery discharge and adjusts the boost circuit's switching duty cycle accordingly. This ensures that even as the battery voltage drops over time, the output voltage remains stable, preventing flicker and maintaining consistent lighting brightness throughout the extended power supply duration.
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
Ensures stable and reliable power supply to loads by maintaining output voltage stability through continuous charging and real-time regulation, preventing flickering and ensuring consistent brightness of emergency lighting devices.
Implementation Method 1
a charging circuit (100), an energy storage unit (200)... the energy storage unit is charged by the charging circuit
Implementation Method 2
the energy storage unit is connected to the boost unit through the boost control circuit to boost the output voltage of the energy storage unit
Implementation Method 3
the feedback unit comprises a first voltage sampling circuit and a first current sampling circuit... to regulate the output voltage in real time
Data Source
AI summary
The application provides an emergency power supply circuit and a lighting device. A main control unit monitors an output voltage of a charging circuit; when the charging circuit is abnormal, an auxiliary power supply is connected to an energy storage unit by means of an auxiliary power supply control circuit to charge the energy storage unit to ensure the power supply stability of the energy storage unit; a boost unit is controlled to be turned on by means of a boost control circuit to boost an output voltage of the energy storage unit to ensure that the output voltage can satisfy the operating voltage requirement of a load; and the boost circuit is electrically connected to a drive control unit by means of a feedback unit to regulate the output volage in real time so as to provide a stable boosted voltage for the load.