Integrated Voltage Divider for Phase and Line Fault Detection
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Solution Overview
Problem
Existing power supply systems face challenges in efficiently converting alternating current (AC) to direct current (DC) while ensuring voltage stability during transmission and conversion, which is crucial for industrial equipment operation.
Innovation Solution
A power supply system incorporating a voltage conversion circuit and multiple voltage detectors, including a voltage dividing circuit, phase voltage detection circuit, and line voltage detection circuit, to convert AC voltage to DC voltage and detect voltage abnormalities accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate voltage dividing circuits are used for phase voltage detection and line voltage detection, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines the phase voltage dividing circuit and line voltage dividing circuit into a single integrated voltage dividing circuit. This unified circuit structure uses shared impedance elements to provide both phase voltage division and line voltage division functions, thereby reducing device complexity while maintaining detection accuracy through proper circuit design
Solution Approach 2:
The voltage dividing circuit is designed to serve multiple functions simultaneously: it provides voltage division for phase voltage detection and for line voltage detection. This multi-functional design eliminates the need for separate dedicated dividing circuits for each detection type, simplifying the overall detector structure
2Measurement precision
If multiple detection nodes are used to detect voltages at different positions, then fault identification accuracy is improved, but device complexity increases
Solution Approach 1:
The patent divides the detection system into multiple detection nodes positioned at different locations in the circuit (first detection node between phase voltage input and first circuit element, second detection node between first and second circuit elements). Each node detects voltages at its specific position, enabling segmented monitoring that accurately identifies fault locations without requiring a single complex detection point
3Device complexity
If a unified voltage dividing circuit is used for both phase and line voltage detection, then device complexity is reduced, but detection precision may deteriorate
Solution Approach 1:
The unified voltage dividing circuit is designed with different impedance elements strategically positioned to provide appropriate voltage division ratios for different detection purposes. The circuit structure ensures that each detection function (phase voltage and line voltage) receives the appropriate divided voltage signal with suitable precision, maintaining local detection quality throughout the unified structure
Data Source
AI summary
A power supply system includes a voltage conversion circuit and at least one voltage detector. The voltage conversion circuit converts AC voltage into DC voltage. The voltage detector includes a voltage dividing circuit, a phase voltage detection circuit, and a line voltage detection circuit. The voltage dividing circuit is coupled to the voltage conversion circuit to receive AC voltage. The voltage dividing circuit includes multiple impedance elements and multiple voltage dividing nodes to output multiple divided voltages. The phase voltage detection circuit is coupled to one of the voltage dividing nodes of voltage dividing circuit to generate a phase voltage detection signal based on one of the divided voltages. The line voltage detection circuit is coupled to a part of the voltage dividing nodes of voltage dividing circuit to generate a line voltage detection signal based on a part of the divided voltages.