Single-Transformer Data Isolation Without High-Voltage Capacitors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high cost of isolative circuits in modems, particularly due to the need for power transformers and high-voltage capacitors, poses a significant challenge in maintaining the integrity of electronic circuits while complying with design requirements that demand a galvanic barrier capable of withstanding high voltages.
Innovation Solution
The method and apparatus utilize a transformer to convey bidirectional data across a galvanic barrier by modulating an AC signal with outbound data and varying the impedance presented to the transformer based on inbound data, eliminating the need for high-voltage capacitors by using the transformer to provide both power and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional isolative circuits with power transformers and high-voltage capacitors are used, then galvanic barrier protection is provided, but material cost increases significantly
Solution Approach 1:
The patent combines the power transmission function and data communication function into a single transformer component. The transformer simultaneously provides galvanic isolation for power delivery and serves as the communication channel for bidirectional data transmission, eliminating the need for separate high-voltage capacitors and reducing overall material cost while maintaining protection reliability
Solution Approach 2:
The transformer is designed to perform multiple functions: it provides galvanic isolation for safety, delivers isolated power to the modem circuitry, and enables bidirectional data communication through impedance modulation. This multi-functionality reduces the number of components needed and lowers material costs while maintaining the necessary protection capabilities
2Productivity
If high-voltage capacitors are used to convey data across the galvanic barrier, then data transmission is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the data communication path with the power transmission path by using the transformer for both purposes. Data is transmitted by modulating the impedance of the modem circuitry, which affects the transformer's operation, eliminating the need for separate capacitor-based communication paths and reducing circuit complexity
Solution Approach 2:
The system uses the transformer's inherent properties to enable communication. By modulating the impedance of the primary or secondary circuitry, the system self-generates the communication signal without requiring additional dedicated communication components, thereby simplifying the overall device structure
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 reduces the material costs associated with isolative circuits while maintaining the necessary galvanic barrier protection, enabling efficient and cost-effective bidirectional data transmission in modem applications.
Implementation Method 1
a transformer to convey bidirectional data across a galvanic barrier by modulating an AC signal with outbound data and varying the impedance presented to the transformer based on inbound data
Data Source
AI summary
Transformer driven by data modulated signal provides isolated power. Outbound data is extracted from the data modulated signal received from the transformer. Inbound data received in isolated circuitry modulates the load presented to transformer. Inbound data perceived in non-isolated circuitry by sensing load experienced by the transformer.