Standby Power Control for Lighting Systems
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Solution Overview
Problem
The existing power factor correction circuits in lighting systems face challenges in shutting down during standby states, leading to excessive standby power consumption due to continuous real-time power loss from resistors in the rectifier circuit, which fails to meet ERP standards.
Innovation Solution
A control device with switching tubes and a comparator is used to synchronize the operation of the power factor correction module and functional modules, turning them on or off based on the system's working state, thereby reducing power consumption by shutting them down during standby.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power factor correction circuits are used to improve power factor, then power factor is improved, but standby power consumption increases
Solution Approach 1:
The patent applies dynamics by making the power factor correction circuit switchable between active and standby states. The control module dynamically controls the switching tubes to turn the power factor correction module on during lighting operation and off during standby, transforming a static always-on circuit into a dynamic conditional operation circuit that adapts to system state.
Solution Approach 2:
The patent implements periodic action through intermittent operation of the power factor correction circuit. Instead of continuous operation, the circuit is activated periodically when lighting is needed and deactivated during standby periods, achieving energy savings while maintaining power factor correction functionality when required.
2Reliability
If resistors are continuously connected in rectifier circuit to achieve high power factor, then power factor is improved, but real-time power loss occurs regardless of working state
Solution Approach 1:
The patent makes the resistor connection dynamic by controlling switching tubes to connect or disconnect resistors based on system state. During standby, switching tubes are turned off, disconnecting resistors from the circuit. During operation, switching tubes are turned on, connecting resistors to achieve power factor correction. This dynamic connection eliminates continuous power loss.
Solution Approach 2:
The patent extracts the power factor correction function from continuous operation and applies it only when needed. By using switching tubes to selectively connect or disconnect resistors, the power factor correction components are taken out of continuous operation and activated only during lighting operation, removing unnecessary energy consumption during standby.
Data Source
Figure 1
AI summary
The present invention relates to a standby power consumption control device for lighting system, the standby power consumption control device comprising power factor correction module; first functional module for assisting in improving a power factor, the first functional module being located at an output end of the rectifier module of the lighting system and electrically connected to the power factor correction module; second functional module for assisting in improving a power factor, the second functional module being electrically connected to an output end of the power factor correction module; the standby power consumption control device further comprising control module electrically connected to the first functional module, the second functional module, and the power factor correction module; the control module can control the first functional module, the second functional module, and the power factor correction module to be synchronously turned on or off according to the working state of the lighting system. Compared with the prior art, the device provided by the invention can reduce standby power consumption and save energy.