Full-Bridge Converter Control for Real-Time Duty Loss Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Duty loss due to parasitic inductance in full-bridge converters leads to reduced efficiency and increased heat generation, making real-time adaptive reflection of duty loss necessary.
Innovation Solution
A converter system comprising a switching unit, transformer, rectifier switch, and sensor, with a controller that measures and adapts to changes in voltage and current to adjust switching times, allowing real-time reflection of duty loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If phase shift control method is used to increase current flow and enable zero voltage switching, then power transfer capability is improved, but duty loss occurs due to parasitic inductance resulting in reduced efficiency
Solution Approach 1:
The patent implements a feedback mechanism where the controller measures the actual voltage across the primary coil or rectifier switch and adjusts the turn-off timing of rectifier switches based on this real-time information. This closed-loop control allows the system to compensate for duty loss caused by parasitic inductance while maintaining the power transfer benefits of phase shift control, thereby resolving the contradiction between power capability and efficiency
Solution Approach 2:
The system dynamically adjusts the turn-off time of rectifier switches based on real-time voltage measurements rather than using fixed timing. This dynamic adaptation allows the converter to optimize its operation under varying load conditions and parasitic effects, improving efficiency without sacrificing power transfer capability
2Device complexity
If duty loss is not compensated in real time, then control simplicity is maintained, but efficiency is reduced and heat generation increases
Solution Approach 1:
The patent replaces complex manual tuning and fixed mechanical timing mechanisms with an electronic sensing and control system. The controller automatically measures voltage waveforms and adjusts switching timing through electronic circuits, substituting mechanical simplicity with electronic intelligence that achieves both efficiency improvement and acceptable control complexity
3Loss of energy
If sensor measures voltage to detect duty loss in real time, then efficiency is improved through adaptive control, but device complexity increases due to additional sensing components
Solution Approach 1:
The patent designs the sensor and control circuitry to serve multiple functions: measuring primary coil voltage for duty loss detection, generating timing signals for rectifier switch control, and providing feedback for efficiency optimization. By making these components multi-functional, the system achieves improved efficiency without proportionally increasing 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 system increases efficiency by adaptively reflecting duty loss in real time, optimizing power transfer and reducing heat generation.
Implementation Method 1
a transformer changing the voltage being outputted from the switching unit
Data Source
AI summary
A converter according to an embodiment of the present invention comprises: a switching unit including a plurality of switches; a voltage transformer connected to the switching unit; a rectifier switch connected to the voltage transformer; and s sensor connected to a primary coil of the voltage transformer, a secondary coil of the voltage transformer, or the rectifier switch.