Power Factor Correction Circuit with Dynamic Mode Adjustment
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Solution Overview
Problem
Existing power supply apparatuses face inefficiencies due to high power loss and surge currents when operating under different input power conditions, particularly with varying mains voltages, which affects stability and safety.
Innovation Solution
A power supply apparatus with a rectifier unit, power factor correction circuit, and control unit that adjusts the energy release switch based on input power source amplitude, switching between continuous and discontinuous conduction modes, and includes a surge limitation unit to manage peak currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power factor correction circuit operates continuously to maintain high power factor, then power factor is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the power factor correction circuit operational status adjustable rather than fixed. The control unit dynamically switches the circuit between active and inactive states based on real-time detection of input power amplitude, enabling the system to adapt its power factor correction behavior to current operating conditions and reduce unnecessary power consumption.
Solution Approach 2:
The patent changes the operational parameter of the power factor correction circuit from a constant active state to a variable state controlled by input power amplitude thresholds. By adjusting the circuit's operational status (on/off) based on detected power parameters, the system optimizes the balance between maintaining power factor and reducing power consumption.
2Power
If multiple conversion power supply units are connected in parallel to increase power capacity, then power output is improved, but surge current increases affecting stability
Solution Approach 1:
The patent applies preliminary action by detecting the input power amplitude before the power factor correction circuit operates. The control unit proactively determines whether to activate the circuit based on pre-detected power conditions, preventing surge current issues before they occur by avoiding circuit activation when input power is insufficient.
Solution Approach 2:
The patent implements feedback by continuously detecting the input power amplitude and using this information to control the power factor correction circuit's operational status. The detection unit provides real-time feedback to the control unit, which adjusts the circuit's state accordingly, creating a closed-loop control system that maintains stability.
3Device complexity
If the power factor correction circuit operates without input power detection to simplify design, then device complexity is reduced, but power loss increases under varying input conditions
Solution Approach 1:
The patent applies universality by making the power factor correction circuit multi-functional: it can operate in active mode when input power is sufficient and switch to inactive mode when input power is low. This single circuit design handles multiple operating scenarios, reducing the need for separate circuits for different power conditions and avoiding unnecessary power loss.
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
This solution reduces power consumption and enhances efficiency by dynamically controlling the power factor correction circuit and limiting surge currents, ensuring stable operation across different input power conditions.
Implementation Method 1
a rectifier unit (1), converts an input power source (Vin) into a rectified power source (Vb)
Implementation Method 2
a power factor correction circuit (2), has an energy storage switch (Q1) enabling an inductor (L) to store energy and an energy release switch (Q2) enabling the inductor (L) to release energy
Data Source
AI summary
A power supply apparatus includes a rectifier unit, a power factor correction circuit, and a control unit. The control unit correspondingly provides a reference voltage according to an amplitude of an input power source. When a voltage signal corresponding to an inductance current of an inductor of the power factor correction circuit is higher than the reference voltage, the control unit controls an energy release switch of the power factor correction circuit to be repeatedly switched on/off, and when the voltage signal is lower than the reference voltage, the control unit controls the energy release switch to be turned off.