Base Station Power Circuit Reverse Current Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Base stations in wireless communication systems face damage from reverse current fluctuations, which can lead to power circuit failures due to abrupt changes in load and voltage fluctuations, particularly with the use of gallium nitride amplifiers.
Innovation Solution
A power circuit configuration for base stations that includes a transformer, rectifier circuit, and smoothing circuit, with a control circuit that detects reverse current and step-by-step reduces the on-duration of the rectifier circuit using digital control to prevent damage and stabilize power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the withstand voltage and rated current of FET are enhanced to handle reverse current, then the power circuit reliability improves, but the device complexity and cost increase
Solution Approach 1:
The patent replaces hardware-based protection (enhancing FET withstand voltage and rated current) with a software/digital control system that detects reverse current and dynamically adjusts rectifier circuit operation. This substitution reduces hardware complexity while maintaining reliability through intelligent control algorithms that monitor current direction and modulate rectifier duty cycle accordingly.
Solution Approach 2:
The patent dynamically changes the operating parameters of the rectifier circuit by adjusting the duty cycle of switching transistors based on detected reverse current conditions. Instead of using fixed high-voltage-rated components, the system varies the on-duration ratio of rectifier transistors to control power flow and prevent damage, thereby reducing hardware specifications requirements while maintaining protection.
2Reliability
If the rectifier circuit is completely turned off to block reverse current, then the power circuit protection improves, but the power supply stability deteriorates
Solution Approach 1:
The patent implements dynamic control of the rectifier circuit where the duty cycle of switching transistors is continuously adjusted based on real-time reverse current detection. Instead of a static on/off state, the system modulates the on-duration ratio dynamically - reducing it during reverse current events and restoring it when normal operation resumes, thereby maintaining both protection and power supply stability.
Solution Approach 2:
The patent employs a feedback mechanism where the digital control circuit continuously monitors the current direction and magnitude, then adjusts the rectifier circuit duty cycle accordingly. This closed-loop control ensures that the rectifier is partially or fully disabled only when reverse current is detected, and恢复正常 operation when conditions improve, balancing protection needs with continuous power supply stability.
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 effectively protects the power circuit by sequentially turning off the rectifier circuit when reverse current is detected, preventing damage and ensuring more stable operation by re-driving the rectifier circuit once the reverse current dissipates.
Implementation Method 1
a power circuit which transfers energy through a transformer of which a primary side and a secondary side are isolated media
Implementation Method 2
a rectifier circuit and a smoothing circuit
Data Source
AI summary
The purpose of the present disclosure is to protect a power circuit of a base station in a wireless communication system, the base station comprising: at least one module for processing a signal; and the power circuit for supplying power to the at least one module. The power circuit comprises a transformer, a rectifier circuit and a smoothing circuit, and the power circuit reduces the ratio of an on-section of the rectifier circuit if a reverse current from the at least one module is detected.