VR Inverter Output Correction Using Digital Potentiometer Feedback
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Solution Overview
Problem
The existing methods for stabilizing the output voltage of VR inverters in servers are inefficient, often requiring manual adjustment of resistors, which leads to low correction efficiency, errors, and potential damage to the board due to frequent disassembly and reassembly.
Innovation Solution
A correction method using a digital potentiometer, controlled by a processor and connected between the output and feedback terminals of the VR inverter, adjusts impedance to stabilize the output voltage by load-pulling with an electronic load and monitoring with a digital multimeter, ensuring the voltage remains within a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of resistors is used to stabilize VR inverter output, then voltage stability can be achieved, but correction efficiency is low and board damage risk increases due to frequent disassembly and reassembly
Solution Approach 1:
The patent replaces manual mechanical adjustment of resistors with automated digital potentiometer control. The digital potentiometer is controlled by a processor to automatically adjust impedance and stabilize output voltage, eliminating the need for manual disassembly and reassembly operations while maintaining voltage stability.
Solution Approach 2:
The system implements self-service through automated feedback control. The processor continuously monitors output voltage and automatically adjusts the digital potentiometer impedance to maintain stability, enabling the system to correct itself without external intervention and thereby improving correction efficiency.
2Reliability
If manual resistor adjustment is performed frequently, then voltage stability can be maintained, but human error increases and board damage risk rises
Solution Approach 1:
The patent eliminates manual mechanical operations by using a digitally controlled potentiometer. The processor sends electronic control signals to adjust impedance, completely removing the need for physical disassembly and reassembly that could cause board damage or introduce human error.
Solution Approach 2:
The system implements continuous feedback control where the processor monitors output voltage and automatically adjusts the digital potentiometer accordingly. This closed-loop feedback mechanism maintains voltage stability while eliminating the need for repeated manual adjustments that increase damage risk.
3Productivity
If digital potentiometer is used for automatic correction, then correction efficiency improves and human error reduces, but device complexity increases
Solution Approach 1:
The processor in the system performs multiple functions including voltage monitoring, control signal generation, and automatic adjustment of the digital potentiometer. By utilizing the existing processor's computational capabilities for correction tasks, the patent avoids adding separate dedicated control hardware, thereby limiting the increase in 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
This method automatically stabilizes the VR inverter output, reducing human error, improving correction efficiency, and preventing damage to the board, while ensuring stable power supply to server components.
Implementation Method 1
adjusting impedance of the digital potentiometer until the average voltage value is within the predetermined voltage range
Implementation Method 2
load-pulling the electronic load at a predetermined frequency, a predetermined step and a predetermined maximum load-pull current to load-pull a current of the VR inverter
Implementation Method 3
determining whether an average voltage value of output voltage of the VR inverter collected by the digital multimeter
Data Source
AI summary
Disclosed are a correction method and a related assembly. According to a solution, loading is performed on an electronic load, and during each loading, a digital multimeter collects the output voltage of a VR inverter; after loading is ended, it is determined whether the average voltage value of the output voltage collected by the digital multimeter is within a preset voltage range, so as to determine whether the VR inverter stably performs output; and when the average voltage value is not within the preset voltage range, it can be determined that the output of the VR inverter is unstable, and it is needed to correct the VR inverter, i.e., the correction of the VR inverter is realized by adjusting the impedance of a digital potentiometer arranged between the output end and the feedback end of the VR inverter.