Galvanic Decoupled DC Load Power Supply for Wide Resistance Range
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Solution Overview
Problem
Existing power supply systems fail to maintain an unvarying direct current through loads with varying resistance values across a wide range, as they do not adequately address the expansion of load resistance range requirements.
Innovation Solution
The proposed apparatus includes a DC voltage source, a DC-voltage-to-pulse-voltage converter, a pulse-voltage-to-DC-voltage converter, and a control circuit with a galvanic decoupler, which stabilizes the voltage drop at the DC stabilizer, ensuring an unvarying direct current flow through a variable load by controlling the conversion of DC voltage to pulse voltage and back, using a control signal to adjust the pulse ratio without electrical contact, thus preventing parasitic currents and protecting equipment and personnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional power supply system is used, then the system structure is simple, but it cannot maintain an unvarying direct current through loads with varying resistance values across a wide range
Solution Approach 1:
The power supply system is divided into multiple functional modules: DC voltage source, DC-voltage-to-pulse-voltage converter, pulse-voltage-to-DC-voltage converter, DC stabilizer, and control circuit. Each module performs a specific function, allowing the system to handle a wide range of load resistances while maintaining current stability.
Solution Approach 2:
The control circuit receives feedback about the load conditions and adjusts the pulse ratio of the DC-voltage-to-pulse-voltage converter accordingly. This closed-loop feedback mechanism enables the system to maintain unvarying direct current through loads with varying resistance values across a wide range.
2Reliability
If direct electrical contact is used for control signal transmission, then the control is direct and simple, but parasitic currents and electric shock risks occur
Solution Approach 1:
A galvanic decoupler is introduced as an intermediary between the control circuit and other system components. This decoupler transmits control signals without direct electrical contact, preventing parasitic currents and electric shock risks while maintaining effective control.
Solution Approach 2:
The patent replaces direct electrical contact (mechanical/electrical connection) with a non-contact control signal transmission method using the galvanic decoupler. This substitution eliminates the harmful effects of direct contact while achieving the same control function.
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 ensures a stable direct current flow through a wide range of load resistance variations, with the maximum output voltage limited by the admissible voltages of the PDCVC components, allowing the load resistance to vary widely while maintaining a consistent current, and preventing inductive pick-ups and electric shock risks.
Implementation Method 1
a control circuit with a galvanic decoupler, which stabilizes the voltage drop at the DC stabilizer, ensuring an unvarying direct current flow through a variable load by controlling the conversion of DC voltage to pulse voltage and back, using a control signal to adjust the pulse ratio without electrical contact, thus preventing parasitic currents and protecting equipment and personnel
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
An apparatus for producing unvarying direct load current comprises a direct voltage source connected to a DC-to-pulse voltage converter connected through a first galvanic decoupler to a pulse-to-DC voltage converter connected to a first terminal of the load. Another terminal of the load is connected to a DC stabilizer connected to a control circuit which is connected through a second galvanic decoupler to a control input of the DC-to-pulse voltage converter. Disclosed are three versions of the apparatus differing by the way the load is connected. The apparatus provides unvarying direct current flowing through the load that can vary within a wider load range.