Radiation-Hardened Power Electronics Control Circuit
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Solution Overview
Problem
Current power electronics control circuits for aerospace systems are costly, require high labor, and have low adaptability due to discrete component adjustments, with limited reliability and high energy consumption, and are not well-suited for radiation environments.
Innovation Solution
A power electronics control circuit device with non-volatile memory and radiation-resistant logic entities, featuring physical separation of entities for fault tolerance, energy efficiency, and adaptable communication mechanisms, including a letterbox-type communication system and finite state machines for deterministic operation, along with redundant units for enhanced reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete analog components are used for power electronics control circuits, then the circuit can be manufactured with existing technology, but the production cost and labor cost increase significantly
Solution Approach 1:
The patent combines multiple discrete components (operational amplifiers, comparators, logic flip-flops, resistors, and capacitors) into a single integrated circuit. This merging eliminates the need for separate manufacturing and adjustment of each component, significantly reducing production cost and labor while maintaining circuit reliability through systematic integration.
Solution Approach 2:
The integrated circuit is designed with configurable parameters that allow it to serve multiple functions and adapt to different applications. By incorporating programmable resistors and capacitors with adjustable values, the same circuit can be customized for various power electronics control needs without requiring entirely different designs, reducing overall production costs.
2Adaptability or versatility
If discrete peripheral components are adjusted for each equipment during production, then the circuit can be customized for specific applications, but the labor cost and production time increase
Solution Approach 1:
The patent implements dynamic configurability within the integrated circuit by incorporating programmable resistors and capacitors whose values can be adjusted electronically. This allows the circuit to adapt to different applications through software or electrical configuration rather than physical component adjustment, eliminating labor-intensive manual customization while maintaining high adaptability.
Solution Approach 2:
The circuit utilizes components with variable parameters (resistors and capacitors with adjustable values) that can be programmed or configured after integration. This enables the same physical circuit to be customized for different applications by changing electrical parameters rather than replacing components, significantly reducing production labor while preserving adaptability.
3Reliability
If aerospace-grade components are used to meet reliability requirements, then the circuit meets high reliability standards, but the inventory cost and turnover time increase
Solution Approach 1:
By integrating all necessary components into a single unit, the patent eliminates the need to maintain separate inventories of discrete aerospace-grade components. The integrated circuit can be manufactured in higher volumes as a complete unit, improving inventory turnover while maintaining reliability through rigorous integration testing and quality control processes.
4Ease of manufacture
If the control circuit is highly integrated, then the production cost decreases, but the resistance to radiation effects worsens
Solution Approach 1:
The patent divides the integrated circuit into distinct functional blocks (operational amplifiers, comparators, logic units, protection circuits) that are physically separated on the chip. This segmentation allows radiation-hardening techniques to be applied to specific sensitive blocks while maintaining the benefits of integration, and enables fault isolation where radiation effects in one block do not propagate to others.
Solution Approach 2:
The circuit incorporates dedicated protection circuits and redundant logic paths designed beforehand to withstand radiation effects. These protective measures are built into the integrated structure, allowing the circuit to maintain functionality in radiation environments without requiring larger physical spacing between components, thus preserving the cost benefits of integration.
Data Source
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AI summary
The device has a digital microcontroller unit (UNMC) for controlling the function of the device. A digital tracing and trouble-shooting unit (UNTD) detects the errors in the design of the device. A digital non-volatile memory (MRN) stores the information representative of the initial configuration of the device. An assembly has a shared memory and a shared memory access controlling unit to control communications according to a mailbox type mechanism between hardware physical entities to assure physical segregation of the entities and deterministic behaviour. The hardware physical entities include an electric current, electric voltage or temperature protecting analog unit (UAP). The digital microcontroller unit, the digital tracing and trouble-shooting unit and the digital non-volatile memory resist to effects of radiation in the space.