SiC Diode Output Rectifier for Voltage Stability
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Solution Overview
Problem
Existing systems for generating electrical pulses struggle to maintain stable current over time, particularly in applications like radar systems and medical devices, due to voltage distortions caused by high current switching events, which can be exacerbated by the need for additional voltage-stabilizing components like filter capacitors that increase system size and complexity.
Innovation Solution
Incorporating a diode-based output rectifier with silicon carbide (SiC) diodes in the current path between a power supply and an electrical energy storage module, which provides high stability of voltage with minimal need for additional stabilizing components, reducing system size and minimizing noise from reverse recovery currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional diodes are used in the output rectifier, then the system can operate with standard components, but voltage stability deteriorates due to reverse recovery currents and distortion
Solution Approach 1:
The patent changes the material parameter of the diode from conventional silicon to silicon carbide (SiC). This material parameter change fundamentally alters the diode's reverse recovery characteristics, reducing reverse recovery current and eliminating voltage distortion. The SiC diode's wider bandgap and higher critical electric field strength enable it to maintain stable voltage output without generating harmful reverse recovery currents, directly resolving the contradiction between reliability and harmful factors.
Solution Approach 2:
The patent employs silicon carbide, a composite material with superior properties compared to conventional silicon. SiC combines the advantages of wide bandgap semiconductors with diode structure, creating a component that inherently suppresses reverse recovery effects. This material substitution transforms the diode into a device that maintains voltage stability while minimizing noise generation, solving the technical contradiction.
2Reliability
If filter capacitors are added to stabilize voltage, then voltage stability improves, but system size and complexity increase
Solution Approach 1:
The patent extracts and eliminates the need for filter capacitors by using SiC diodes in the output rectifier. The SiC diode's inherent ability to suppress reverse recovery currents and prevent voltage distortion removes the requirement for additional voltage-stabilizing components. This extraction of unnecessary components directly reduces system complexity while maintaining voltage stability, resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The SiC diode provides self-service by inherently stabilizing voltage through its material properties without requiring external filter capacitors. The diode's low reverse recovery current characteristic automatically prevents voltage distortion, making the system self-regulating and eliminating the need for additional stabilizing components. This self-service capability reduces both system size and complexity while maintaining voltage stability.
3Reliability
If filter capacitors are added to stabilize voltage, then voltage stability improves, but system size increases
Solution Approach 1:
The patent extracts and eliminates the need for filter capacitors by using SiC diodes in the output rectifier. The SiC diode's inherent ability to suppress reverse recovery currents and prevent voltage distortion removes the requirement for additional voltage-stabilizing components. This extraction of unnecessary components directly reduces system complexity while maintaining voltage stability, resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The SiC diode provides self-service by inherently stabilizing voltage through its material properties without requiring external filter capacitors. The diode's low reverse recovery current characteristic automatically prevents voltage distortion, making the system self-regulating and eliminating the need for additional stabilizing components. This self-service capability reduces both system size and complexity while maintaining voltage stability.
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 use of SiC diodes in the output rectifier achieves a stable voltage input to the energy storage module, reducing current variations and eliminating the need for filter capacitors, thus maintaining stable electrical pulses with reduced system size and complexity.
Implementation Method 1
The output rectifier may comprise a diode based rectifier circuit comprising at least one diode at least in part based on silicon carbide
Data Source
AI summary
An output rectifier (10) is disclosed which is electrically connected or connectable in a current path between a power supply (20) and an electrical energy storage module (30). The power supply (20) is configured to supply power to the electrical energy storage module (30) via the output rectifier (10). The output rectifier (10) comprises at least one diode (11, 12, 13, 14) at least in part based on silicon carbide. An arrangement (100) comprising the output rectifier (10) is also disclosed.