Voltage Protector System with Distributed Clamping and Dynamic Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surge protection devices, such as Transient Voltage Surge Suppressors (TVSS), are ineffective against longer duration over-voltages and can cause damage or fires, as they are designed primarily for short duration transients like lightning strikes.
Innovation Solution
A voltage protector system that includes a processor circuit, switching elements, and voltage clamping devices, which utilize predefined voltage-time curves to manage and dissipate over-voltages, isolating the electrical load during prolonged over-voltage events to prevent damage and overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TVSS devices are designed to handle short duration transients, then they provide effective protection for lightning strikes, but they provide no protection against longer duration over-voltage disturbances and can cause fires
Solution Approach 1:
The patent implements dynamic switching between two operational modes: a first mode for short duration transients using a first voltage clamping device, and a second mode for longer duration over-voltages using a second voltage clamping device. The controller dynamically selects which clamping device to activate based on the duration and characteristics of the detected voltage surge, allowing the system to adapt its protection strategy to different threat scenarios.
Solution Approach 2:
The protection system is segmented into two distinct functional paths: a first voltage clamping device optimized for short duration transients (lightning strikes) and a second voltage clamping device optimized for longer duration over-voltages. This segmentation allows each component to be specialized for its specific function, resolving the contradiction between handling brief high-power events versus sustained lower-power events.
2Device complexity
If a single voltage clamping device is used, then the device structure is simple, but it cannot effectively handle both short and long duration over-voltages
Solution Approach 1:
The controller serves multiple functions: it detects voltage surges, determines their duration characteristics, selects the appropriate clamping device, and manages the switching between operational modes. This multi-functionality allows the system to achieve comprehensive protection coverage without proportionally increasing overall system complexity, as the controller integrates multiple responsibilities into a single control unit.
3Reliability
If TVSS devices operate continuously during over-voltages, then they provide constant protection, but they overheat and cause damage to equipment
Solution Approach 1:
The system employs periodic or pulsed clamping action rather than continuous operation. The controller monitors the duration of voltage surges and activates the appropriate clamping device only for the necessary duration to handle the transient event. This periodic activation allows the clamping devices to dissipate energy in controlled pulses rather than continuous operation, preventing overheating while maintaining protection effectiveness.
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
Effectively protects electrical loads from both short and long duration over-voltages, preventing damage and fires by selectively isolating the load during sustained over-voltage conditions, thus extending the lifespan of surge protection components.
Implementation Method 1
voltage clamping devices, which utilize predefined voltage-time curves to manage and dissipate over-voltages
Data Source
AI summary
Disclosed are various embodiments of voltage protectors that include a first voltage clamping device configured to clamp a voltage of an input power applied to an electrical load, and a second voltage clamping device configured to clamp the voltage applied to the electrical load. A series inductance separates the first and second voltage clamping devices. Also, a switching element is employed to selectively establish a direct coupling of the input power to the electrical load, where a circuit is employed to control the operation of the switching element.