Inductive Transducer for Excess Voltage Protection Diagnostics
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Solution Overview
Problem
Existing excess voltage protection apparatuses lack clear and unambiguous methods to determine the condition of components post-excess voltage events, leading to uncertain maintenance and potential replacement of entire units or individual parts, with existing monitoring methods providing incomplete or unreliable information.
Innovation Solution
The diagnostic method involves actively connecting a secondary inductance to a decoupling inductance to form an inductive transducer, allowing for precise measurement and evaluation of secondary voltages, which includes determining ignition events, edge steepness, and dynamic response voltage to assess the condition of gas discharge and diode paths, providing clear indicators of component health.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature control fuses are used to monitor the diode path, then the response of the diode path can be verified, but useful information is not provided in all cases of excess voltage events
Solution Approach 1:
The patent introduces an intermediary measurement approach by using the inductive transducer to measure voltage across the decoupling inductance, which indirectly provides information about the diode path condition without relying on temperature control fuses that only respond to sufficient power transposition
Solution Approach 2:
The patent replaces the thermal-based temperature control fuse mechanism with an electrical measurement approach using the inductive transducer, which provides immediate electrical signal-based diagnostics rather than relying on thermal effects that may not activate in all excess voltage scenarios
2Reliability
If opto-couplers are used in the diode path to detect impulses, then the response can be verified, but it is not possible to ascertain whether the detected impulse has damaged or destroyed the diodes
Solution Approach 1:
The patent uses the voltage measurement across the decoupling inductance as an intermediary indicator of diode path condition. The measured voltage characteristics (amplitude, duration, shape) serve as indirect but precise indicators of whether the diodes have been damaged or destroyed, without requiring direct physical contact with the diodes
Solution Approach 2:
The patent implements feedback by continuously monitoring the voltage across the decoupling inductance and using this information to assess the condition of the diode path. The measurement results provide feedback about the health status of the protective elements, enabling determination of whether replacement is needed
3Quantity of substance
If the ascertainment of peak value of total current is used, then current monitoring is provided, but no data on the state of components of the diode path is obtained
Solution Approach 1:
The patent uses the voltage across the decoupling inductance as an intermediary measurement that contains encoded information about both the current flow and the condition of the diode path components. By analyzing the characteristics of this voltage signal, the system simultaneously obtains current information and component health status
Solution Approach 2:
The patent makes the measurement system universal by using a single measurement approach (voltage across decoupling inductance) that serves multiple functions: monitoring current flow, assessing diode path condition, detecting gas discharge events, and determining when replacement is needed
4Reliability
If existing monitoring methods are used, then some component conditions can be detected, but clear and unambiguous information for maintenance decisions is not provided
Solution Approach 1:
The patent implements comprehensive feedback by measuring voltage across the decoupling inductance and analyzing its characteristics to provide clear feedback about the condition of both the gas discharge distance and diode path. This feedback enables unambiguous maintenance decisions based on the measured voltage parameters
Solution Approach 2:
The patent uses changes in the electrical characteristics (analogous to color changes) of the measured voltage signal to indicate different component conditions. By analyzing voltage amplitude, duration, and shape changes, the system provides clear indicators of component health status similar to how color changes indicate different states
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
This approach enables accurate determination of the condition of excess voltage protection apparatuses, distinguishing between functional and defective states, ensuring appropriate maintenance and reducing unnecessary replacements by providing comprehensive information on component health.
Implementation Method 1
a secondary inductance actively connected, inductively, to a decoupling inductance
Data Source
AI summary
The invention relates to a diagnostic method for multiple-stage excess voltage protection apparatuses that include at least one gas discharge distance between an input and a reference potential as a first stage, at least one diode path between an output and the reference potential as a second stage, and at least one decoupling inductance interposed between the input and the output. The diagnostic method is characterized in that a secondary voltage applied to a secondary inductance, which is actively connected, inductively, to the decoupling inductance, is measured and evaluated with a view to excess voltage events in the excess voltage protection apparatus. The invention also relates to a two-stage excess voltage protection apparatus.