DC-Pulse Voltage Converter with Feedback for Stable Output
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Solution Overview
Problem
Existing devices fail to provide stable DC voltage over a wider range of output voltages while substantially reducing the pulsed component in output voltage and current, as they do not adequately address the requirement for stability and pulsation reduction.
Innovation Solution
A device comprising a DC voltage source, a DC-pulse voltage converter, a pulse voltage-DC converter, a regulator, a proportional regulator, and a control circuit with feedback nodes and galvanic isolation, which converts DC voltage into pulse voltage, filters it, and uses negative feedback to suppress pulsation, ensuring stable DC voltage and current with minimal energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional DC voltage sources with basic rectification are used, then the device complexity is low, but the stability of DC voltage and the magnitude of pulsed component in output voltage and current are insufficient
Solution Approach 1:
The patent implements a feedback control system where the control circuit receives a portion of the output voltage from the pulse voltage-DC converter and uses it to regulate the DC-pulse voltage converter. This feedback mechanism enables automatic adjustment to maintain stable DC voltage output while suppressing pulsation, resolving the contradiction between reliability and complexity by introducing intelligent control rather than simple passive components.
Solution Approach 2:
The patent divides the voltage conversion process into distinct stages: DC-pulse voltage conversion, pulse voltage-DC conversion, and regulated output stages. Each stage performs a specific function (voltage transformation, rectification, stabilization), allowing the system to achieve high reliability through modular functional segmentation while keeping each individual module relatively simple.
2Object-generated harmful factors
If conventional rectification methods are used, then the device complexity is low, but the magnitude of pulsed component in output voltage and current is high
Solution Approach 1:
The control circuit uses feedback from the output stage to dynamically adjust the operation of the DC-pulse voltage converter, suppressing pulsation in real-time. This active feedback control effectively reduces the harmful pulsed components without requiring complex passive filtering circuits, thereby resolving the contradiction between reducing harmful factors and maintaining simple device structure.
Solution Approach 2:
The patent employs periodic pulse-width modulation in the DC-pulse voltage converter to transform the continuous DC input into controlled pulse-width modulated output. This periodic action, when properly synchronized and regulated, allows for efficient energy transfer while the subsequent rectification and feedback control eliminate the harmful pulsation, achieving low pulsed components without excessive complexity.
3Reliability
If DC voltage is converted to pulse voltage and back without proper regulation, then the device complexity is low, but the stability of DC voltage over a broader range of output voltages is poor
Solution Approach 1:
The patent implements dynamic regulation through the control circuit that continuously adjusts the duty cycle of the DC-pulse voltage converter based on feedback from the output stage. This dynamic adaptation allows the system to maintain stable DC voltage output across a broader range of operating conditions and load variations, resolving the contradiction between reliability over wide range and device complexity by using intelligent control rather than multiple fixed circuits.
Solution Approach 2:
The control circuit serves multiple functions simultaneously: it regulates the DC-pulse voltage converter, suppresses pulsation, and maintains stable output voltage across varying conditions. This multi-functionality allows a single control module to achieve broad operational stability without requiring separate dedicated circuits for each function, thereby resolving the contradiction between reliability over wide range and 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 solution achieves stable DC voltage over a broader range of output voltages with significantly reduced pulsed components in both voltage and current, maintaining minimal energy loss and high stability.
Implementation Method 1
a DC-pulse voltage converter, the inputs of which are connected to the outputs of the DC voltage source
Implementation Method 2
a pulse voltage-DC converter, the inputs of which are connected to the outputs of the DC-pulse voltage converter
Implementation Method 3
supplied by a feedback node, one output of which is connected to the input of the proportional regulator and the other output of which is connected to the output of the regulator
Data Source
AI summary
The proposed variant devices are intended for producing a highly stable constant voltage in a wide range of output voltages. A highly stable constant voltage is produced by generating a control signal which adjusts the relative pulse duration as a constant voltage is converted into a pulse voltage, taking into account a constant voltage setpoint value in the load, while also stabilizing a constant current and reducing the pulse components in the constant current through the use of negative feedback.