Solid-State Transformer Power Supply for Fewer DC Conversion Stages
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Solution Overview
Problem
Conventional data center power supply systems require multiple power conversion steps, leading to increased equipment costs and circuit losses due to the need for multiple converters to stabilize voltage for low-voltage direct current supply to loads.
Innovation Solution
A power supply apparatus utilizing a solid-state transformer to convert alternating current into direct current, with high-frequency DC/DC converters and energy storage components to minimize power conversion steps and reduce equipment costs, while maintaining stable voltage during energy storage and supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple power conversion steps are used to convert AC to DC, then voltage stability is improved, but equipment cost and device complexity increase
Solution Approach 1:
The patent combines multiple power conversion functions into a single integrated power conversion device that performs both AC-DC conversion and DC-DC conversion in one unit, eliminating the need for separate converters and reducing overall system complexity while maintaining voltage stability
2Reliability
If multiple power conversion steps are used, then voltage stability is improved, but circuit loss increases
Solution Approach 1:
The patent merges multiple power conversion operations into a single integrated conversion process, eliminating intermediate conversion steps and reducing cumulative energy losses that occur in traditional multi-stage conversion systems
3Reliability
If multiple converters are used to stabilize voltage, then power supply reliability is improved, but occupied space increases
Solution Approach 1:
The patent integrates multiple converter functions into a single compact power conversion device, significantly reducing the physical space required while maintaining the voltage stabilization capabilities through unified control mechanisms
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 reduces the number of power conversion components, lowers costs and occupied space, and minimizes circuit losses by directly converting alternating current to low-voltage direct current, stabilizing voltage during energy storage, and ensuring efficient power supply to loads.
Implementation Method 1
a solid-state transformer, configured to convert an alternating current into a first direct current
Implementation Method 2
a first direct current/direct current converter, coupled to the solid-state transformer, and configured to convert the first direct current into a second direct current
Data Source
AI summary
Embodiments of this application disclose a power supply apparatus, a power supply system, and a data center designed to reduce the number of power conversion steps, equipment costs, and circuit loss. The power supply apparatus includes: a solid-state transformer configured to convert an alternating current into a first direct current; a first direct current/direct current converter, coupled to the solid-state transformer and configured to convert the first direct current into a second direct current; an energy storage component, coupled to the first direct current/direct current converter and configured to perform energy storage on the second direct current; and a second direct current/direct current converter, coupled to the first direct current/direct current converter and configured to convert the second direct current into a third direct current, where the third direct current is used to supply power to a load.