Planar Magnetics With CCTO Film for Built-In Capacitance
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Solution Overview
Problem
Existing power electronic devices face challenges in miniaturization due to high built-in parasitic capacitance, which hinders the design of compact high-power density converters while maintaining efficiency, as traditional approaches aim to minimize parasitic components, often conflicting with other design goals.
Innovation Solution
The integration of a calcium copper titanate (CCTO) nanoparticle film into planar electromagnetic devices, which includes multiple layers of copper sheets spaced by ferromagnetic cores and internal insulators, enhances parasitic capacitance, allowing for both inductive and capacitive characteristics without external capacitors, and is synthesized using a colloidal method for high dielectric constant materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional approaches are used to minimize parasitic components, then device reliability is improved, but device volume cannot be reduced further and power density is limited
Solution Approach 1:
The patent converts the harmful parasitic capacitance into a beneficial feature by intentionally designing the planar electromagnetic device to utilize parasitic capacitance for power factor correction. The parasitic capacitance that was previously minimized is now embraced and used to reduce the need for external capacitors, thereby reducing device volume while maintaining reliability.
Solution Approach 2:
The planar electromagnetic device is designed to perform multiple functions simultaneously: it provides electromagnetic transformation while also providing power factor correction through its inherent parasitic capacitance. This multi-functionality eliminates the need for separate external capacitor components, reducing overall device volume.
2Power
If external capacitors are added for power factor correction, then power density is improved, but device volume increases
Solution Approach 1:
The patent merges the power factor correction function with the electromagnetic device by utilizing the parasitic capacitance inherent in the planar structure. The electromagnetic device and the capacitor function are combined into a single integrated component, eliminating the need for separate external capacitors and reducing overall device volume.
Solution Approach 2:
The planar electromagnetic device is designed to perform multiple functions simultaneously: electromagnetic transformation and power factor correction. This multi-functionality allows the device to provide power density improvement without requiring additional external capacitor components that would increase volume.
3Volume of stationary object
If planar magnetics are used to reduce size, then device volume is reduced, but built-in parasitic capacitance increases
Solution Approach 1:
The patent converts the harmful parasitic capacitance generated by planar magnetics into a beneficial feature for power factor correction. Instead of viewing parasitic capacitance as a harmful factor to be minimized, the design embraces it and utilizes it to reduce the need for external capacitors, thereby maintaining small device volume while improving power factor.
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
This approach enables the creation of compact power electronic devices with increased power density by embracing parasitic components, reducing volume while maintaining performance, and providing mechanical robustness and vibration resistance.
Implementation Method 1
The planar converter has both inductive and capacitive characteristics
Implementation Method 2
a calcium copper titanate (CCTO) nanoparticle film
Implementation Method 3
Each layer of copper sheet is spaced apart by at least one or a combination of a ferromagnetic core
Implementation Method 4
a ferromagnetic core
Data Source
AI summary
Provided is planar electro-magnetic device with both inductive and capacitive characteristics comprising a calcium copper titanate CCTO nanoparticle film. The planar electro-magnetic device may be used in a circuit of a power electronic device, such as a converter, signal electronic, and/or communication device. Further, a method of making the CCTO nanoparticle film is provided. The method comprising combining gOLAc and OLAm, heating the OLAc and OLAm, adding metal alkoxide precursors to the OLAc and OLAm to create CCTO NPs, purifying the CCTO NPs, adding sulfide ions to the NP, dispersing the sulfide ion passivated CCTO NP in solvent, and spin coating a film of CCTO NP onto aluminum foil.