Power Delivery Device Dynamic Power Factor Correction
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Solution Overview
Problem
Existing power delivery devices face inefficiencies and increased energy consumption due to unnecessary activation of power factor correction circuits when output power is low, which contradicts energy-saving goals while complying with regulations.
Innovation Solution
The power delivery device selectively activates or deactivates the power factor correction circuit based on the output voltage level, deactivating it when the output power is below a certain threshold to reduce unnecessary energy consumption and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power factor correction circuit is always activated to comply with power factor regulations, then the power factor compliance is improved, but the energy consumption increases and efficiency deteriorates at low output power levels
Solution Approach 1:
The power factor correction circuit is designed to dynamically switch between active and inactive states based on the output power level. When output power exceeds a predetermined threshold, the circuit activates to ensure power factor compliance; when output power remains below the threshold, the circuit remains inactive to avoid unnecessary energy consumption. This dynamic adaptation resolves the contradiction between maintaining continuous compliance and reducing energy usage.
Solution Approach 2:
The system changes the operational parameter (activation state) of the power factor correction circuit based on the output power level parameter. By monitoring output power and adjusting the circuit's activation state accordingly, the system optimizes the balance between power factor compliance and energy consumption, avoiding the fixed-state approach that causes the contradiction.
2Reliability
If the power factor correction circuit is always activated to ensure power factor compliance, then the regulatory compliance is improved, but the charging device efficiency deteriorates at low output power
Solution Approach 1:
The power factor correction circuit transitions from a static always-on design to a dynamic switchable design. The circuit activates only when output power exceeds the predetermined threshold, ensuring compliance when necessary while maintaining high efficiency during low-power operation. This dynamic behavior directly addresses the contradiction between compliance reliability and operational efficiency.
Solution Approach 2:
Instead of applying full power factor correction continuously, the system applies partial action by activating the correction circuit only when the output power level warrants it. This selective activation avoids the excessive energy consumption associated with continuous operation while maintaining compliance during high-power charging operations.
3Reliability
If the power factor correction circuit operates continuously to meet power factor regulations, then the regulatory compliance is improved, but unnecessary energy consumption increases reducing overall efficiency
Solution Approach 1:
The system implements dynamic control of the power factor correction circuit based on real-time output power monitoring. The circuit switches between active and inactive states according to whether output power exceeds the predetermined threshold, eliminating continuous operation and the associated unnecessary energy losses while maintaining compliance during high-power operation.
Solution Approach 2:
The patent extracts the power factor correction function from a continuous operation mode and separates it into conditional operation. By removing the unnecessary continuous activation and retaining only the essential compliance-driven activation at high power levels, the system eliminates energy waste while preserving the core compliance function.
Data Source
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AI summary
A power delivery device and a control method are shown. The power delivery device includes a power conversion circuit, a power factor correction circuit, and an output voltage control circuit. The power conversion circuit includes a primary side and a secondary side, and is configured to receive an input voltage and convert the input voltage to an output voltage. The power factor correction circuit is electrically coupled to the primary side and configured to increase the power factor of the power delivery device. The output voltage control circuit is electrically coupled to the secondary side and configured to control the voltage level of the output voltage. When the voltage level of the output voltage is lower than a predetermined level, the power factor correction circuit is deactivated.