Flyback Transformer With SiC Switching for Compact Geophysical Transmitters
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Solution Overview
Problem
Current geophysical induced polarization survey systems face limitations in depth of investigation due to insufficient power in electrical transmitters and require a compact, lightweight design for difficult access measurement sites.
Innovation Solution
A high-power transformer with a flyback converter configuration using wide bandgap semiconductors and a shell-type transformer core with interleaved windings, along with isolation systems for safety and efficiency, is developed to enhance power transmission and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power generated by the electrical transmitter is improved to increase depth of investigation, then the depth of investigation is improved, but the weight and size of the transmitter increases
Solution Approach 1:
The patent changes the material parameter from conventional silicon-based semiconductors to wide bandgap semiconductors (GaN, SiC), which have fundamentally different electrical characteristics including higher breakdown fields and higher electron saturation velocities. This material parameter change enables the transmitter to generate higher power output while maintaining a compact and lightweight design, directly resolving the contradiction between power improvement and weight reduction.
Solution Approach 2:
The patent employs composite material structures by integrating wide bandgap semiconductor materials with specialized substrate materials and packaging structures. This composite approach allows the system to achieve high power generation capability while maintaining mechanical strength and thermal management, thereby increasing transmitter power without proportionally increasing its weight.
2Power
If the power generated by the electrical transmitter is improved to increase depth of investigation, then the depth of investigation is improved, but the size of the transmitter increases
Solution Approach 1:
By changing the semiconductor material parameter to wide bandgap materials, the patent achieves higher power density (power per unit volume). This allows the transmitter to generate higher power levels within a reduced volume, directly resolving the contradiction between power improvement and size reduction for easier transportation to remote measurement sites.
3Ease of manufacture
If conventional silicon-based semiconductors are used in the transmitter, then the device is easier to manufacture, but the power output and efficiency are limited
Solution Approach 1:
The patent changes the material parameter from silicon-based semiconductors to wide bandgap semiconductors (GaN, SiC). Although these materials present greater manufacturing challenges, the patent addresses this by implementing specialized manufacturing processes and device structures that enable mass production. The trade-off is acceptable given the substantial improvements in power output, efficiency, and operational characteristics.
4Weight of moving object
If the transmitter is designed to be compact and lightweight for difficult access sites, then the ease of transport is improved, but the power generation capability is reduced
Solution Approach 1:
The patent changes the semiconductor material parameter to wide bandgap materials, which enable high power generation in a compact form factor. This material parameter change fundamentally alters the power-to-weight and power-to-volume ratios, allowing the transmitter to maintain lightweight and compact design while achieving high power generation capability for deep subsurface investigation.
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 increases the depth of investigation in geophysical surveys by providing higher power transmission with a compact and lightweight design, ensuring user safety and improved efficiency through reduced leakage flux and eddy losses.
Implementation Method 1
a primary and a secondary in galvanic isolation forming a flyback converter, wherein the primary comprises at least one primary winding; the secondary comprises at least one secondary winding
Implementation Method 2
the core is made of material of high magnetic permeability and high saturation point such as ferrites, solid metals, powered metals and the like. The high permeability, relative to the surrounding air, causes the magnetic field lines to be concentrated in the core material
Implementation Method 3
the primary rectifier circuit is a junction diodes circuit, such as a Graetz bridge rectifier, a full-wave rectifier, a diode-bridge rectifier
Data Source
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AI summary
The present invention relates to an output high power transformer (T), comprising a primary (1) and a secondary (2) in galvanic isolation forming a flyback converter (F), wherein the primary (1) comprises at least one primary winding (11) having at least two primary turns and a rectifier comprising a junction diode circuit (13); the secondary (2) comprises at least one secondary winding (21) having at least one secondary turn; and the flyback converter (F) comprises at the primary (1) at least one metal-oxide-semiconductor field-effect transistor (MOSFET) (12), notably a Silicon Carbide MOSFET, and at the secondary (2) at least one Silicon Carbide diode (22).