PFC Flyback Converter for Low-Voltage Daisy-Chain Power Factor
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Solution Overview
Problem
Low-voltage power supplies in daisy-chained configurations for environment controllers typically suffer from a low electrical power factor, which negatively impacts equipment performance when multiple controllers are connected in series.
Innovation Solution
A low-voltage daisy-chainable power supply utilizing a Power Factor Correction (PFC) flyback converter to achieve a high power factor, ensuring efficient energy distribution and minimizing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If low-voltage power supplies are used in daisy-chained configurations for environment controllers, then safety and ease of installation are improved, but electrical power factor deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the electrical characteristics of the power supply through Power Factor Correction (PFC) circuitry. The PFC circuit actively adjusts the phase relationship between voltage and current, changing the power factor parameter from low to high, thereby resolving the contradiction between ease of installation and electrical power factor performance
Solution Approach 2:
The patent introduces an intermediary Power Factor Correction circuit between the low-voltage power supply and the daisy-chained environment controllers. This intermediary component mediates the electrical power factor issue without requiring changes to the low-voltage safety architecture, allowing daisy-chained configurations to maintain both safety and high power factor
2Productivity
If multiple environment controllers are connected in daisy-chained configuration, then system coverage and productivity are improved, but low power factor causes harmful effects on equipment performance
Solution Approach 1:
The PFC circuit serves as an intermediary that eliminates the harmful effects of low power factor on daisy-chained equipment while preserving the productivity benefits of expanded system coverage. The circuit compensates for reactive power without limiting the number of controllers that can be connected
3Use of energy by moving object
If Power Factor Correction is implemented in low-voltage power supply, then electrical power factor is improved, but device complexity increases
Solution Approach 1:
The patent merges the Power Factor Correction functionality with the existing low-voltage power supply circuitry. By integrating the PFC circuit into the power supply unit rather than adding it as a separate external component, the design improves power factor while minimizing the increase in overall device complexity
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 implementation of a PFC flyback converter in the low-voltage daisy-chainable power supply significantly improves the electrical power factor, enabling more environment controllers to be connected safely and efficiently on a single power line while maintaining compliance with safety standards.
Implementation Method 1
a Power Factor Correction (PFC) flyback converter. The low-voltage daisy-chainable power supply receives a low-voltage power and the PFC flyback converter has a high power factor for supplying a high power factor low-voltage power
Data Source
AI summary
The present environment controller is adapted for being powered in low-voltage daisy-chained power configuration. The environment controller comprises a low-voltage daisy-chainable power supply comprising a Power Factor Conversion (PFC) flyback converter. The low-voltage daisy-chainable power supply receives a low-voltage power and outputs a high PFC low-voltage power for powering the environment controller.