Series Power-Line Current Extraction With Boosted Voltage Regulation
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Solution Overview
Problem
Current active residual differential current detection devices (DDR) fail to meet the stringent European standards, particularly in supporting a wide range of current values from 10 milliamps to several amps, and lack functionality independent of supply voltage.
Innovation Solution
A power supply device connected in series on a single power line of an electrical network, utilizing a power transistor with a voltage booster and control module to stabilize output voltage, allowing for efficient power extraction and regulation across varying current conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a power supply device is powered directly by mains voltage, then the device can operate with active monitoring capabilities, but the device fails to function independently across a wide range of supply voltage conditions
Solution Approach 1:
The power supply device extracts power from the power line itself through a power transistor, making the device self-powered without external voltage sources. The device uses the current flowing through the power line to generate its own operating voltage, enabling it to function autonomously across varying voltage conditions while maintaining active monitoring capabilities
2Adaptability or versatility
If a high voltage drop is introduced across the power transistor to generate sufficient power, then the device can operate independently, but significant energy is lost and difficult to dissipate
Solution Approach 1:
A voltage booster circuit is introduced as an intermediary between the power transistor and the electronic system. This voltage booster converts the low voltage generated across the power transistor into a higher voltage suitable for powering the electronic system, thereby reducing the voltage drop required across the transistor and minimizing energy loss while maintaining voltage independence
3Stability of the object's composition
If the voltage across the power transistor is regulated to a constant value, then the output voltage is stable, but energy efficiency deteriorates significantly under high current conditions
Solution Approach 1:
The voltage across the power transistor is made dynamic rather than constant. The voltage booster adjusts its operation based on the instantaneous current flowing through the power line, allowing the transistor voltage to vary optimally with current conditions. This dynamic adjustment maintains stable output voltage through the booster while improving energy efficiency by avoiding excessive voltage drops under high current conditions
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 the operation of active DDR devices independently of supply voltage and current values, reducing energy losses and enhancing efficiency by managing voltage drop and current variations.
Implementation Method 1
a voltage booster for converting a voltage V DS across the terminals of the power transistor, i.e. a voltage V DS available between the input electrode and the output electrode of the power transistor, into an output voltage V out greater than the voltage V DS across the terminals of the power transistor
Implementation Method 2
The power transistor makes it possible, for example, to generate a voltage drop of between a few millivolts (mV) and about twenty volts (V) from which it is possible to extract power to supply an electronic system
Data Source
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AI summary
The present invention relates to a current extraction power supply device (100) intended to be connected in series on a single supply line (80) of a power source of a single-phase or polyphase electrical network. The power supply device (100) includes: - a power transistor (10) having an input electrode (11), an output electrode (12), and a control electrode (13), - a voltage booster (20) to convert a voltage (VDS) across the terminals of the power transistor (10), i.e. a voltage (VDS) available between the input electrode (11) and the output electrode (12) of the power transistor (10), into an output voltage (Vout) greater than the voltage (VDS) across the terminals of the power transistor (10), - a control module (30) of the voltage booster (20) to stabilize the output voltage (Vout) at a reference value (Vout_set).