High-Frequency Isolating Converter Layout for Redundant Loop Power
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Solution Overview
Problem
Existing redundant power supply systems face issues with complex structures, numerous connection lines, and difficult maintenance due to phase-shifting transformers, leading to potential single-sided powering of loads during faults.
Innovation Solution
A power supply system utilizing high-frequency isolating converters, such as solid-state transformers (SSTs), which convert medium voltage AC inputs into low voltage DC outputs and are cross-connected to ensure redundant power supply, reducing complexity and enabling modular design for easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase-shifting transformers are used to avoid single-sided powering of loads, then reliability is improved, but device complexity increases and maintenance difficulty increases
Solution Approach 1:
The patent extracts and removes the phase-shifting transformer from the system, replacing it with a direct connection between AC inputs and rectifier bridges. This eliminates the complex transformer windings and connection lines while maintaining the reliability benefit through the bridge rectifier's inherent redundancy capability
Solution Approach 2:
The patent replaces the mechanical/electromagnetic phase-shifting transformer with an electronic rectification system using bridge rectifiers. This substitution simplifies the system by using solid-state electronic components instead of heavy electromagnetic transformers, reducing complexity while achieving the same reliability goal
2Reliability
If phase-shifting transformers with multiple windings are used, then power supply reliability is improved, but the number of connection lines increases
Solution Approach 1:
The patent removes the phase-shifting transformer and its multiple windings from the system. Instead, it uses bridge rectifiers that inherently provide fault tolerance without requiring additional connection lines, thus reducing the quantity of connection lines while maintaining reliability
Solution Approach 2:
The patent uses bridge rectifiers that create redundant current paths through their bridge structure. This copying of current paths through the bridge configuration provides fault tolerance without needing additional physical connection lines, as the bridge structure itself provides the redundancy
3Reliability
If phase-shifting transformers are used, then power supply reliability is improved, but maintenance time increases
Solution Approach 1:
The patent extracts the phase-shifting transformer from the system and replaces it with bridge rectifiers. This eliminates the maintenance burden of complex transformer windings and connections, allowing for faster maintenance and repair while maintaining continuous power supply reliability through the bridge's inherent redundancy
Solution Approach 2:
The patent changes the system architecture from transformer-based to rectifier-based, fundamentally altering the maintenance characteristics. The solid-state rectifier components have longer lifetimes and require less maintenance than electromagnetic transformers, reducing maintenance time while preserving reliability
4Reliability
If phase-shifting transformers are used, then power supply reliability is improved, but system weight and size increase
Solution Approach 1:
The patent removes the heavy phase-shifting transformer from the system and replaces it with lightweight bridge rectifier circuits. This extraction eliminates the weight burden while maintaining fault resistance through the electronic redundancy provided by the bridge rectifier configuration
Solution Approach 2:
The patent replaces the heavy electromagnetic transformer system with lightweight solid-state electronic rectification circuits. This substitution dramatically reduces system weight and size while achieving the same reliability goal through electronic means rather than electromagnetic transformation
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 system achieves a simpler, more compact structure with reduced footprint, allowing for fast maintenance and reliable dual power supply even in the event of faults, enhancing system reliability and efficiency.
Implementation Method 1
a first high-frequency isolating converter including a first end connected to a first medium voltage AC input, a second end and a third end... convert medium voltage AC inputs into low voltage DC outputs
Data Source
AI summary
The disclosure provides a power supply unit, including: a first high-frequency isolating converter including a first end connected to a first voltage, a second end and a third end; and a second high-frequency isolating converter including a first end connected to a second voltage, a second end and a third end, wherein the second end of the second high-frequency isolating converter and the second end of the first high-frequency isolating converter are connected in parallel to a first end of a first load, and the third end of the second high-frequency isolating converter and the third end of the first high-frequency isolating converter are connected in parallel to a second end of the first load. The disclosure further provides a loop power supply system having the power supply unit.