Segmented Windings for Coupled Inductor Circuit Design
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Solution Overview
Problem
Existing DC-DC voltage converters face design challenges in stepping down high supply voltages to low voltages or vice versa, particularly due to the size and complexity of conventional transformers.
Innovation Solution
The use of planar coupled inductor circuits with segmented windings, where multiple substrate layers with vias enable efficient electrical connections, allowing for reduced size and complexity by employing a first winding with multiple turns and a second winding with segmented turns, which can be connected in parallel to achieve a voltage ratio through magnetic coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional transformers are used for high-frequency switching in DC-DC voltage converters, then voltage conversion can be achieved, but the device size and complexity increase
Solution Approach 1:
The patent divides the transformer windings into multiple segments distributed across different substrate layers. Each winding is split into segments that are connected through vias, allowing the transformer to be constructed in a modular fashion that reduces overall complexity while maintaining voltage conversion functionality.
Solution Approach 2:
The patent transitions from traditional planar or three-dimensional winding structures to a multi-layer substrate architecture. By distributing windings across multiple horizontal layers and connecting them vertically through vias, the design achieves compact integration while maintaining the necessary magnetic coupling for voltage conversion.
2Power
If high-frequency switching is used to achieve desired output voltage, then voltage conversion efficiency improves, but resistive losses and heat dissipation increase
Solution Approach 1:
By segmenting the windings into multiple sections across different layers, the patent reduces the current density in each individual trace. This segmentation distributes the electrical load, reducing resistive losses (I²R losses) and consequently decreasing heat generation while maintaining high-frequency switching efficiency.
Solution Approach 2:
The patent employs thin conductive traces and vias through the substrate layers to create compact winding structures. These thin-film conductors minimize parasitic resistance and inductance, enabling efficient high-frequency operation with reduced energy losses.
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 configuration results in a more efficient and compact DC-DC voltage converter with reduced resistive losses, enabling effective step-down or step-up voltage conversion with improved energy efficiency and reduced heat dissipation.
Implementation Method 1
a first winding (101) occupying a first substrate layer (103) and a second substrate layer (104) of the planar coupled inductor circuit (100) and a second winding (102) occupying a third substrate layer (105) and a fourth substrate layer (106) of the planar coupled inductor circuit (100)
Implementation Method 2
In addition to the trace (108), the layer can include vias (107) for accommodating interconnections between the substrate layers of the coupled inductor circuit (100)
Data Source
AI summary
Techniques are provided for segmented windings of a coupled inductor within a DC-DC voltage converter or regulator. In an example, a coupled inductor circuit can include a first winding comprising a conductive coil having a central axis, and a second winding configured to magnetically couple with the first winding. The second winding can have a plurality of individual segments. Each individual segment can form a fraction of one turn of the second winding. Each segment can include a first conductor, a ground conductor, and a first switch to selectively couple, and selectively isolate, the first conductor and the ground conductor.