Multi-section Coil Component for Power Loss Reduction
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Solution Overview
Problem
Existing technologies for improving battery efficiency in portable electronic devices, such as multiphase converter technology and pulse frequency modulation, require complex circuit configurations to maintain efficiency across a wide current range, from low to high currents.
Innovation Solution
A coil component is configured by connecting multiple coils with different DC resistance levels but similar inductance levels in series, allowing for improved efficiency across the entire current range without the need for complex circuit configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiphase converter technology is used to improve efficiency at high current, then power loss is reduced, but circuit complexity increases
Solution Approach 1:
The single coil is segmented into multiple coil sections (first coil section, second coil section, third coil section) with different DC resistance values. Each section handles different current ranges efficiently, eliminating the need for complex multiphase converter circuits while maintaining high current efficiency.
Solution Approach 2:
Different portions of the coil have different local properties (DC resistance values) optimized for different current ranges. The first coil section has higher DC resistance suitable for low current, while the second and third sections have lower DC resistance for high current operation.
2Loss of energy
If pulse frequency modulation technology is used to improve efficiency at low current, then power loss is reduced, but circuit complexity increases
Solution Approach 1:
The coil is divided into multiple sections with different DC resistance characteristics. The first coil section with higher DC resistance is naturally more efficient at low currents, eliminating the need for PFM circuitry while achieving low current efficiency.
Solution Approach 2:
The coil structure uses parameter changes (DC resistance values) across different sections to adapt to different current conditions. By varying the DC resistance of each coil section, the system achieves efficient operation across the entire current range without active modulation circuits.
3Loss of energy
If multiple coils with different DC resistance are connected in series, then efficiency across entire current band is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple coil sections with different DC resistance values are merged into a single integrated coil component with unified construction. This combining approach achieves the efficiency benefits of multiple coils while simplifying manufacturing by treating it as one component rather than multiple separate components.
Solution Approach 2:
The single coil component performs multiple functions that would traditionally require separate components or complex circuits. It simultaneously provides high current efficiency, low current efficiency, and simplified mounting through its multi-section design with different DC resistance values.
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 solution enhances efficiency in both low and high current conditions, reducing AC and DC losses, and simplifies the mounting process on electronic devices by using a single coil component with multiple lead terminals.
Implementation Method 1
a coil disposed within the body and including a first coil conductor having a first conductor pattern with a planar coil shape
Implementation Method 2
a connection conductor disposed between the first and second coil conductors to connect the first and second coil conductors to each other
Data Source
AI summary
A coil component includes a body; and a coil disposed within the body, wherein the coil includes: a first coil conductor including a first conductor pattern with a planar coil shape and a first lead terminal extended to at least one surface of the body; a second coil conductor including a second conductor pattern with a planar coil shape and a second lead terminal extended to at least one surface of the body; and a connection conductor connecting the first and second coil conductors to each other and including a third lead terminal extended to at least one surface of the body.