Active Control Device for DC/DC Converter Voltage Regulation
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Solution Overview
Problem
Existing electrical circuits with DC/DC converters in vehicles experience electromagnetic disturbances like overvoltages due to charging modes, which are harmful and require bulky, expensive passive filters to mitigate.
Innovation Solution
An active control device with an interruption module and control means that can switch main switches between ON, OFF, and intermediate states to manage voltage and reduce electromagnetic disturbances, using MOSFET components and diodes to create a variable resistor effect, reducing the need for bulky passive filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a passive filter (CLC type) is used to reduce electromagnetic disturbances, then electromagnetic disturbances are reduced, but the device becomes bulky, heavy and expensive
Solution Approach 1:
The patent replaces the mechanical/passive filter system with an active control system using semiconductor switches (MOSFETs or IGBTs) that can dynamically adjust their resistance to compensate for voltage variations. This electronic control approach substitutes the bulky passive CLC filter with lightweight semiconductor components and control circuitry, achieving the same electromagnetic disturbance reduction without the weight and cost penalty.
2Object-affected harmful factors
If a passive filter (CLC type) is used to reduce electromagnetic disturbances, then electromagnetic disturbances are reduced, but the device becomes bulky and expensive
Solution Approach 1:
The patent replaces the complex passive filter structure with a simpler active control system using semiconductor switches and control circuitry. The active control device monitors voltage variations and dynamically adjusts switch resistance to compensate, replacing the complex multi-component passive CLC filter with a more manageable electronic control architecture.
3Object-affected harmful factors
If main switches are placed in intermediate state to reduce voltage variations, then electromagnetic disturbances are reduced, but control complexity increases
Solution Approach 1:
The patent employs dynamic control of semiconductor switches that can operate in three states (fully ON, fully OFF, and intermediate/partially ON). The control circuit dynamically adjusts the switch resistance by modulating the gate-source voltage, enabling the switch to provide variable resistance to compensate for voltage variations. This dynamic operation allows the system to adapt to changing conditions while managing control complexity through standardized control circuitry.
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 control device effectively reduces electromagnetic disturbances while being lightweight and cost-effective, minimizing voltage variations and overvoltage peaks, thus enhancing the reliability and efficiency of electrical circuits in vehicles.
Implementation Method 1
a main switch IP with at least three states, including at least one partially on intermediate state
Implementation Method 2
a diode DI connected in parallel
Data Source
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AI summary
The invention relates to a control device (DC) fitted to an electric circuit (CE) comprising a current generator (GC) connected in parallel to a first electrical energy storage system (SE1), a consumption network (RA1) and a DC/DC converter (CV) connected in series to a second electrical energy storage system (SE2). Said device (DC) comprises a switching module (MI) mounted in series between the current generator (GC) and the converter (CV), and comprising two switching means (MI1-MI2) mounted in series and each comprising a main switch (IP) having three states, and control means (MC) controlling the placing of the main switches (IP) in an intermediate state when the converter (CV) recharges the second electrical energy storage system (SE2) and the voltage measurement at the terminals of the power supply network (RA) is higher than a voltage-limiting setpoint at said same terminals.