Integrated Inductor Damper Circuit for Power Filters
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Solution Overview
Problem
Conventional power filter circuits with off-the-shelf resistors face failures due to fragile ceramic bases and low pulse power capability, leading to increased production time, cost, and reduced reliability, necessitating an integrated solution within the inductor package.
Innovation Solution
Integration of a resistive element printed on a flexible substrate within the toroidal inductor housing, either around the inductor coil or between the coil and housing, enhancing pulse power capability and reliability without altering the package size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional off-the-shelf resistors are used in power filter circuits, then the circuit can be assembled with standard components, but the resistor failures due to fragile ceramic base and low pulse power capability reduce reliability
Solution Approach 1:
The patent combines the resistor and inductor into a single integrated component. The resistor element is embedded within the inductor structure, eliminating the need for separate resistor and inductor components. This merging improves reliability by reducing the number of potential failure points while maintaining or enhancing pulse power capability.
Solution Approach 2:
The inductor structure is designed to serve multiple functions: it provides inductance for filtering while simultaneously housing the resistor element for damping applications. This multi-functionality allows a single component to replace what would traditionally require multiple discrete components, improving both reliability and simplifying the overall circuit design.
2Productivity
If conventional wire wound resistors are used, then adequate pulse power capability is achieved, but the large and bulky package style requires wire harness and supports that increase production time and cost
Solution Approach 1:
By integrating the resistor element directly into the inductor package, the patent eliminates the need for separate wire harnesses and support structures. This consolidation reduces the number of assembly steps, decreases production time, and lowers manufacturing costs while maintaining the pulse power capability needed for reliable operation.
Solution Approach 2:
The resistor element is nested within the inductor structure, with the resistor embedded in the magnetic core or winding area of the inductor. This nesting approach allows the resistor to be housed within the existing inductor package without requiring additional external mounting hardware, thereby simplifying assembly and reducing production complexity.
3Productivity
If conventional wire wound resistors are used, then adequate pulse power capability is achieved, but the large and bulky package increases component count and factory assembly time
Solution Approach 1:
The integration of the resistor element into the inductor package reduces the total component count by eliminating the need for separate resistor and inductor components. This merging also reduces assembly time since fewer components need to be individually placed and connected during manufacturing.
Solution Approach 2:
The integrated component serves dual purposes as both an inductor and a resistor, allowing a single component to fulfill the functions of what would traditionally require two separate components. This multi-functionality directly reduces component count and simplifies the assembly process.
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 integration reduces component count, assembly time, and increases pulse power capability, thereby enhancing the reliability and efficiency of power filter circuits.
Implementation Method 1
a basic building block of a power filter is a low pass filter including an inductor (L) and a capacitor (C). This filter can also contain a damper circuit including a capacitor and a damper resistor (R)
Implementation Method 2
a toroidal inductor having an inductor coil and an inductor housing
Data Source
AI summary
An inductor damper circuit includes a toroidal inductor having an inductor coil and an inductor housing, and a resistive element configured around a periphery of the inductor coil and having one end connected to the toroidal inductor, where the resistive element is printed on a flexible substrate and configured between the inductor coil and the inductor housing, and the resistive element is integrated with the toroidal inductor.