Isolated Power Supply Aging Monitoring via PWM Opto-Coupling
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Solution Overview
Problem
Conventional power supply systems face challenges in obtaining real-time electrical parameters from electrically isolated components due to transmission delays, making it difficult to accurately monitor the aging level and efficiency of the system.
Innovation Solution
A power supply system utilizing a digital opto-isolation coupler for signal transmission between isolated control units, converting secondary electrical parameters into PWM signals, and comparing them with thresholds to determine the aging level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UART communication protocol is used to transfer electrical parameters between primary and secondary sides, then data transmission is enabled, but transmission delay occurs affecting real-time monitoring
Solution Approach 1:
The patent replaces the UART communication protocol (software-based serial communication) with PWM signal transmission through opto-isolators (hardware-based direct coupling). This substitution eliminates the need for complex communication protocols and buffering, achieving direct real-time parameter transmission between primary and secondary sides without transmission delay.
Solution Approach 2:
The patent introduces opto-isolators as intermediary devices between the primary and secondary control circuits. These opto-isolators enable direct optical coupling for signal transmission while maintaining electrical isolation, allowing real-time parameter transfer without the delays inherent in UART communication.
2Reliability
If electrical parameters are obtained from electrically isolated components, then system safety is maintained, but simultaneous parameter acquisition becomes difficult
Solution Approach 1:
The patent uses opto-isolators as intermediary devices that enable direct signal transmission between electrically isolated primary and secondary sides. This allows simultaneous acquisition of electrical parameters from both sides while maintaining electrical isolation safety, as the opto-isolators provide both isolation and direct coupling functionality.
Solution Approach 2:
The opto-isolators in the patent serve multiple functions simultaneously: they provide electrical isolation for safety, enable direct signal transmission for real-time monitoring, and allow bidirectional parameter transfer. This multi-functionality resolves the contradiction between maintaining isolation safety and facilitating easy parameter acquisition.
3Duration of action of stationary object
If conventional monitoring methods are used, then system operation continues, but aging level cannot be accurately determined
Solution Approach 1:
The patent implements a feedback mechanism where the primary control unit continuously receives real-time electrical parameters (input power, output power) from both primary and secondary sides through opto-isolators. The processor calculates efficiency based on these feedback parameters and compares it with reference efficiency to determine aging level, enabling accurate monitoring while the system continues normal operation.
Solution Approach 2:
The patent replaces conventional indirect monitoring methods with direct real-time parameter transmission through PWM signals and opto-isolators. This substitution enables the processor to calculate efficiency and determine aging level accurately by directly accessing real-time electrical parameters from both isolated sides, rather than relying on delayed or indirect measurements.
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
Enables continuous monitoring of the power supply system's aging level and efficiency in real-time, preventing component failure by detecting aging and efficiency deviations.
Implementation Method 1
the digital opto-isolation coupler is configured to provide signal transmission between the primary control unit and the secondary control unit with electrical isolation
Data Source
AI summary
A power supply system and a method for monitoring aging level of power supply system are provided. The method includes steps of: (a) providing the power supply system including a first conversion circuit, a second conversion circuit and a control circuit; (b) converting a secondary electrical parameter of the second conversion circuit into a PWM signal by a secondary control unit; (c) transmitting the PWM signal from the secondary control unit to a primary control unit through the digital opto-isolation coupler; (d) obtaining an aging reference parameter according to the secondary electrical parameter, reflected by the PMW signal, and a primary electrical parameter of the first conversion circuit by the primary control unit; and (e) comparing the aging reference parameter with a parameter threshold to determine the aging level of the power supply system by the primary control unit.