Primary Side Regulation Circuit for Wide Current Range Power Delivery
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Solution Overview
Problem
Existing electrical power circuits face limitations in efficiently delivering power to electronic devices, particularly in regulating current levels across a wide range and maintaining high efficiency with low standby power requirements.
Innovation Solution
The implementation of a primary side regulation (PSR) circuit with a forward converter, which includes a transformer, a primary side switch circuit, a current sensor, a capacitive element, and a regulating controller that determines current levels and generates control signals to adjust the current on the transformer's primary winding, allowing for efficient power regulation across a wide current range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional power circuits are used to deliver power to electronic devices, then power delivery is achieved, but efficiency is insufficient and standby power requirements are high
Solution Approach 1:
The patent implements self-service through primary side regulation where the circuit monitors and regulates its own operation. The controller circuit detects voltage across the primary winding and automatically adjusts switching parameters to maintain optimal efficiency, eliminating the need for secondary side feedback components and achieving high efficiency with low standby power consumption
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting switching parameters based on detected voltage conditions. The controller modifies duty cycle and switching frequency according to real-time voltage measurements across the primary winding, enabling the circuit to adapt to varying load conditions and maintain high efficiency across different operating points
2Adaptability or versatility
If current regulation is implemented across wide current range, then power delivery flexibility is improved, but circuit complexity increases
Solution Approach 1:
The patent achieves universality by designing a single primary side regulation circuit that handles multiple functions: voltage detection, current regulation, and power factor correction. The same controller circuit manages the entire current range from light to full load without requiring separate regulation circuits for different operating modes, thus providing wide current range adaptability without proportionally increasing complexity
Solution Approach 2:
The patent extracts the regulation function to the primary side, eliminating the need for complex secondary side regulation components such as opto-isolators and feedback windings. By taking out the regulation functionality and implementing it where voltage sensing is naturally available, the circuit achieves wide current regulation range while reducing overall system 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
This solution enables high-efficiency power delivery to electronic devices, providing DC voltage output from AC mains with extremely low standby power requirements and independent voltage regulation, suitable for devices like smartphones and laptops, while minimizing the need for external components and opto-isolation.
Implementation Method 1
a transformer. The system may also include a forward converter electrically coupled to the transformer
Implementation Method 2
a capacitive element electrically coupled to the primary winding of the transformer, the capacitive element configured to reset the transformer
Data Source
AI summary
One or more embodiments of the present disclosure may include a method of power regulation. The method may include determining a peak voltage level on a primary winding of a transformer. The method may also include selecting a particular coarse current level window based on the determined current level. Wherein the particular coarse current level window is one of a plurality of coarse current level windows. The method may additionally include determining a low window value based on the particular coarse current level window. The method may include generating a reference voltage based on the low window value. The method may also include generating a control signal based on the reference voltage. The method may additionally include transmitting the control signal to a switch circuit coupled to the primary winding of the transformer to adjust the current level on the primary winding of the transformer.