Parallel Ceramic Capacitor Units for Voltage-Dependent Dielectric Profiles
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Solution Overview
Problem
Conventional ceramic and polymer film capacitors have limitations in achieving high power density and uniform dielectric value profiles across varying voltage ranges, especially in high-power applications, due to their voltage-dependent dielectric properties.
Innovation Solution
A ceramic multilayer capacitor design featuring two capacitor units made of different materials, one with high dielectric value at low voltages and the other at high voltages, connected in parallel, along with a temperature regulator and overvoltage/overcurrent protection, to maintain a consistent dielectric value profile and enhance power density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single material is used in the capacitor, then the device complexity is reduced, but the dielectric value cannot remain high across the entire voltage range
Solution Approach 1:
The capacitor is divided into multiple capacitor units, each filled with a different dielectric material optimized for specific voltage ranges. This segmentation allows each material to operate in its optimal performance range, maintaining high dielectric values across the entire voltage spectrum while managing complexity through modular design.
Solution Approach 2:
Different dielectric materials are assigned to different capacitor units based on their voltage-dependent properties. Each material is strategically selected and positioned to address specific voltage range requirements, creating local optimization where each material contributes its strengths to the overall capacitor performance.
2Power
If materials with high dielectric value are used, then the power density is improved, but the manufacturing complexity and processing difficulty increase
Solution Approach 1:
The invention selects dielectric materials and configures capacitor units based on their voltage-dependent dielectric characteristics. By changing the operational parameter (voltage range) and matching materials to specific ranges, the system achieves high power density while using materials that can be processed within existing manufacturing capabilities.
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 achieves a high and consistent dielectric value across the entire voltage range, improving power density and reliability while allowing for the use of cost-effective and easily processed materials, with the temperature regulator optimizing dielectric performance and the protection components managing voltage spikes.
Implementation Method 1
The first material has a high dielectric value at low applied voltages and the second material has a high dielectric value at high applied voltages
Implementation Method 2
the temperature regulator optimizing dielectric performance
Data Source
AI summary
A ceramic multilayer capacitor includes a first capacitor unit, which comprises a first material, and a second capacitor units, which comprises a second material. The first and the second capacitor unit are electrically connected in parallel. At low applied voltages, the first material has a high dielectric value and, at high applied voltages the second material has a high dielectric value.