Electronic Fuse Voltage Regulation for Load Noise Isolation
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Solution Overview
Problem
Electrical protection systems, such as fuse assemblies in vehicles, face challenges in reducing noise and non-linearities introduced by loads, which can negatively affect noise-sensitive components like sensors.
Innovation Solution
An electronic fuse system with a switching component, such as a field effect transistor, and an active control circuit that includes a voltage regulation component to regulate voltage by measuring voltage drops and applying voltages to maintain a stable output voltage, reducing noise and non-linearities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple loads are connected to a power source through a fuse assembly, then the electrical protection system can serve multiple loads, but noise from non-linear loads can negatively affect noise-sensitive loads such as sensors
Solution Approach 1:
The fuse assembly is divided into multiple independent fuse modules, each serving a specific load or group of loads. This segmentation isolates noise from non-linear loads to their respective fuse modules, preventing noise propagation to noise-sensitive loads in other modules. Each fuse module operates independently with its own current sensing and switching capabilities.
Solution Approach 2:
A controller acts as an intermediary between loads and the power source, managing current distribution and isolation. The controller monitors current in each fuse module and can open specific fuses to isolate noisy loads from the main power distribution network, thereby protecting noise-sensitive loads while maintaining power supply to other loads.
2Device complexity
If a traditional fuse assembly is used without voltage regulation, then the system structure is simple, but voltage drops and non-linearities can affect load performance
Solution Approach 1:
Each fuse module incorporates current sensing that provides feedback to the controller. The controller uses this feedback information to monitor voltage drops across the fuse module and adjust the switching state of the electronic fuse to maintain stable voltage delivery to loads, compensating for non-linearities in real-time.
Solution Approach 2:
The traditional mechanical fuse is replaced with an electronic fuse module containing a FET (field-effect transistor) as the switching component. This substitution enables active voltage regulation and noise filtering capabilities while maintaining the protective function, allowing the system to dynamically respond to voltage variations and maintain reliability.
3Reliability
If an electronic fuse with active control circuit is used, then voltage regulation and noise reduction are achieved, but the device complexity increases
Solution Approach 1:
The controller serves multiple functions: it monitors current in all fuse modules, determines overcurrent conditions, opens specific fuses for protection, and regulates voltage delivery to loads. By consolidating these functions into a single control unit, the system achieves advanced voltage regulation and noise reduction capabilities without proportionally increasing overall system complexity.
Solution Approach 2:
Multiple fuse modules share common components including the controller, power source connection, and load distribution network. The electronic fuse modules are designed with standardized components (FETs, current sensors) that can be replicated across modules, reducing per-module complexity through economies of scale and modular design.
Data Source
AI summary
A system for regulating voltage includes an electronic fuse including a switching component and an active control circuit connected to the switching component, the control circuit configured to open the switching component based on at least an overcurrent condition. The system also includes a voltage regulation component connected to the switching component, the voltage regulation component configured to regulate a voltage across the switching component by applying a voltage to the switching component based on a measured voltage drop across the switching component, and a desired load voltage.