Parallel Strand Surge Protection with Voltage Divider Control
Solution Overview
Problem
Existing overvoltage protection systems, such as those using spark gaps or varistors, are subject to aging and wear, leading to inconsistent performance and potential failure to intercept damaging overvoltages, necessitating regular replacement and increasing production and operating costs.
Innovation Solution
A bidirectional overvoltage protection system with parallel-connected strands and switching elements, each with a resistor and control input, allows for dynamic voltage regulation and current distribution, using a voltage divider to actuate switching elements based on voltage levels, ensuring consistent performance and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional surge protectors using spark gaps or varistors are used, then overvoltage protection is provided, but the components are subject to aging and wear, leading to inconsistent performance and requiring regular replacement
Solution Approach 1:
The surge protection function is divided into multiple parallel strands, each with its own switching element. This segmentation allows individual strands to be activated or deactivated independently, preventing single-point failure and extending overall system lifespan through selective component usage.
Solution Approach 2:
The system dynamically switches between different strands based on operational conditions and wear status. The control unit monitors component health and activates alternative strands when degradation is detected, maintaining consistent protection performance throughout the system's extended operational life.
2Adaptability or versatility
If multiple switching elements are used in parallel strands, then dynamic voltage regulation and current distribution are achieved, but the device complexity increases
Solution Approach 1:
Each strand is designed with identical components (resistor and switching element), creating universal modules that can perform multiple functions: surge protection, voltage regulation, and current distribution. This modular universality simplifies the overall design despite the presence of multiple strands.
Solution Approach 2:
The control unit receives feedback from voltage sensors and monitors the state of switching elements to dynamically adjust which strands are active. This feedback mechanism enables automatic adaptation to changing voltage conditions without requiring complex manual control circuits.
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 system effectively limits overvoltages, reduces wear, and extends the lifespan of components, lowering production and operating costs while maintaining high safety and operational reliability.
Implementation Method 1
a voltage divider (60) having a number of series-connected resistive elements (62) corresponding to the number of strands (28), wherein a tap (64) is formed between adjacent resistive elements (62)
Implementation Method 2
Each strand (28) has a resistor (30) which is connected between the first terminal (18) and a switching element (32) with a control input (34)
Implementation Method 3
A number of strands (28) are connected in parallel between the two terminals (18, 20), with each strand limiting current flow to prevent overvoltage
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a surge protection device (16) with a first terminal (18) and a second terminal (20), between which a number of strands (28) are connected in parallel. Each strand (28) comprises a resistor (30) connected between the first terminal (18) and a switching element (32) having a control input (34). The surge protection device (16) has a voltage divider (60) connected between one of the control inputs (34) and the first terminal (18), and the voltage divider has a number of series-connected resistor elements (62) corresponding to the number of strands (28). A tap (64) is formed between adjacent resistor elements (62), with each tap (64) being connected to one of the remaining control inputs (34). The invention further relates to the use of a surge protection device (16).