Power Transmission Sampling Module With Split Isolation and ADCs
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Solution Overview
Problem
Conventional multiplex systems for sampling analogue characteristics in power transmission systems are large, heavy, prone to non-linearity errors, and suffer from cross-talk due to the use of physically large isolating transformers, which limits their accuracy and compactness.
Innovation Solution
A sampling module with separate scaling and isolating circuits, along with an analogue to digital converter, replaces conventional isolating transformers, enabling more compact and accurate sampling by optimizing scaling and isolation functions, allowing concurrent sampling of multiple characteristics and reducing noise corruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional isolating transformers are used for sampling analogue characteristics, then electrical isolation and protection are provided, but the system becomes large, heavy, and prone to cross-talk and non-linearity errors
Solution Approach 1:
The patent divides the traditional single transformer isolation function into two separate circuits: a scaling circuit that reduces voltage magnitude and an isolating circuit that provides electrical isolation. This segmentation allows each circuit to be optimized for its specific function, enabling the system to achieve the required isolation and protection with significantly reduced weight and size compared to conventional isolating transformers.
2Reliability
If conventional isolating transformers are used for sampling analogue characteristics, then electrical isolation is provided, but non-linearity errors and cross-talk increase
Solution Approach 1:
By separating the scaling and isolating functions into distinct circuits, the patent eliminates the non-linearity errors and cross-talk inherent in conventional transformers. The scaling circuit processes the analogue signal with high precision before it reaches the isolating circuit, ensuring that measurement accuracy is maintained while electrical isolation is provided.
Solution Approach 2:
The patent introduces an intermediary scaling circuit between the high-voltage analogue characteristic and the isolating circuit. This intermediary circuit reduces the signal to a suitable level before isolation, preventing the isolating circuit from being exposed to high voltages that would cause non-linearity and cross-talk, thereby improving measurement precision.
3Adaptability or versatility
If conventional multiplex systems are used for sampling, then multiple analogue characteristics can be sampled, but the system becomes complex and sampling accuracy deteriorates due to sequential processing
Solution Approach 1:
The patent assigns a dedicated ADC to each input circuit, segmenting the conversion function across multiple parallel channels. This allows each analogue characteristic to be converted to digital independently and simultaneously, eliminating the sequential processing bottleneck of conventional multiplex systems and maintaining high sampling accuracy for all characteristics.
Solution Approach 2:
Each input circuit in the patent is designed as a universal module that can handle different analogue characteristics (voltage, current, etc.) through the same scaling-isolating-conversion chain. This modular universal design enables multi-characteristic sampling with the same level of precision as single-characteristic sampling, unlike conventional multiplex systems where sharing components degrades accuracy.
4Device complexity
If conventional multiplex systems are used for sampling, then component sharing is achieved, but sampling speed and responsiveness are reduced due to sequential processing
Solution Approach 1:
The patent segments the ADC function into multiple independent converters, one for each input circuit. This segmentation enables parallel operation where multiple analogue characteristics are converted to digital simultaneously, dramatically increasing sampling speed and responsiveness while maintaining the benefit of dedicated conversion for each channel.
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 solution results in a more compact, lighter, and accurate sampling module with reduced non-linearity errors and cross-talk, enabling finer resolution and flexible sample rates, while eliminating bottlenecks and skew in conventional systems.
Implementation Method 1
a scaling circuit for reducing the magnitude of the analogue characteristic to a desired level
Implementation Method 2
an isolating circuit for creating an electrical barrier between respective upstream and downstream portions of the input circuit
Data Source
AI summary
A sampling module, for sampling one or more analog characteristics of a power transmission system, including at least one input circuit for sampling a respective analog characteristic. Each input circuit includes: a scaling circuit for reducing the magnitude of the analog characteristic to a desired level; an isolating circuit for creating an electrical barrier between respective upstream and downstream portions of the input circuit; and an analog to digital converter for digitizing the analog characteristic to produce a digital data stream. The scaling circuit is electrically connected to an input of the analog to digital converter, and the isolating circuit is electrically connected directly to an output thereof.