Multi-Phase Electronic Power Transformer High-Frequency Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional transformers are large and heavy, posing challenges in space-restricted areas and impacting logistics and operational efficiency, especially in applications like utility distribution systems, ships, planes, and railroads due to their size and weight.
Innovation Solution
A multi-phase electronic power transformer with fewer switching devices operating at higher frequencies, reducing the size and weight of the transformer while maintaining efficiency, achieved through a configuration of primary and secondary windings with synchronized switching devices and multi-phase diode bridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional line-frequency transformers are used, then they can handle utility distribution power levels, but they become large and heavy
Solution Approach 1:
The patent changes the operating frequency parameter from line-frequency (50-60 Hz) to high frequency (2 kHz to 2 MHz). This parameter change enables the transformer to handle the same power levels while dramatically reducing the size and weight of the magnetic core and windings, as high-frequency transformers require smaller magnetic components to transfer the same amount of power.
Solution Approach 2:
The patent replaces the conventional electromagnetic transformer mechanism with an electronic switching system. Solid-state switching devices (transistors, IGBTs, or other semiconductor switches) are used to convert DC power to high-frequency AC power, eliminating the need for large line-frequency magnetic cores and heavy windings while maintaining power transfer capability.
2Power
If conventional line-frequency transformers are used, then they can handle utility distribution power levels, but they occupy large volume
Solution Approach 1:
The patent changes the operating frequency parameter from line-frequency (50-60 Hz) to high frequency (2 kHz to 2 MHz). This parameter change enables the transformer to handle the same power levels while dramatically reducing the size and weight of the magnetic core and windings, as high-frequency transformers require smaller magnetic components to transfer the same amount of power.
3Device complexity
If fewer switching devices are used, then device complexity is reduced, but it becomes challenging to maintain synchronous operation at high frequencies
Solution Approach 1:
The patent employs a single controller that performs multiple functions: it generates switching signals for both primary and secondary switching devices, synchronizes their operation, and maintains timing coordination. This multi-functional controller reduces the number of separate control circuits while ensuring reliable synchronous operation of all switching devices at high frequencies.
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 enables a significant reduction in size and weight, improving operational efficiency and reducing costs by operating at higher frequencies and maintaining part-load efficiency compared to conventional line-frequency transformers.
Implementation Method 1
a set of secondary windings, wherein each secondary winding is configured to inductively couple with a respective primary winding
Data Source
AI summary
A multi-phase electronic power transformer includes a set of primary windings, wherein each primary winding is configured to couple with an input voltage. The transformer includes a pair of primary switching devices that includes a first primary switching device coupled to a first end of each primary winding and a second primary switching device coupled to a second end of each primary winding distinct from the first end of each primary winding. The transformer includes a set of secondary windings, wherein each secondary winding is configured to inductively couple with a respective primary winding and to output a voltage. The transformer includes a pair of secondary switching devices that includes a first secondary switching device coupled to a first end of each secondary winding and a second secondary switching device coupled to a second end of each secondary winding distinct from the first end of the each secondary winding.