Multi-Rectifier AC-DC Converter for Wide DC Voltage Range
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Solution Overview
Problem
Existing AC-DC converter circuits struggle to provide a wide range of DC output voltages efficiently, requiring many active components which leads to lower efficiency and higher costs.
Innovation Solution
The proposed AC-DC converter circuit utilizes multiple rectifier circuits connected to different windings of a generator, along with additional switches and transistors, to achieve a wide range of DC output voltages with reduced active components, thereby enhancing efficiency and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If many active components are used to provide a wide range of DC output voltages, then the voltage range is improved, but the efficiency deteriorates and cost increases
Solution Approach 1:
The converter circuit is divided into multiple rectifier circuits (first, second, and third rectifier circuits) that can be independently controlled. Each rectifier circuit processes power from different windings of the generator, allowing selective activation based on the required output voltage level. This segmentation enables the system to achieve wide voltage adaptability while maintaining high efficiency by only activating the necessary segments for each operating condition.
2Adaptability or versatility
If many active components are used to provide a wide range of DC output voltages, then the voltage range is improved, but the device complexity increases
Solution Approach 1:
Multiple rectifier circuits are merged into a single integrated converter system with shared control logic and common output terminals. The first, second, and third rectifier circuits are combined such that they all contribute to the same DC output, allowing the system to achieve wide voltage range capability while reducing overall complexity compared to having separate independent converters for each voltage level.
3Adaptability or versatility
If many active components are used to provide a wide range of DC output voltages, then the voltage range is improved, but the cost increases
Solution Approach 1:
Each rectifier circuit is designed to perform multiple functions - they can operate independently or in combination with others to provide different output voltage levels. The same hardware components (rectifier circuits, switches, diodes) serve multiple purposes across different operating modes, eliminating the need for separate dedicated converters for each voltage level and thereby reducing manufacturing cost while maintaining wide voltage adaptability.
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 allows for a high range of DC output voltages with fewer active devices, resulting in increased efficiency, reduced conduction and switching losses, and lower overall system costs.
Implementation Method 1
each input connection connected between a pair of series-connected rectifier diodes connected between first and second output terminals
Implementation Method 2
an output capacitor connected between the first and second output terminals
Data Source
AI summary
AC-DC converter circuits which may include: first and second rectifier circuits each having a plurality of input connections for connection to respective first and second sets of windings of a generator, each input connection connected between a pair of series-connected rectifier diodes connected between first and second output terminals, an output capacitor connected between the first and second output terminals; a first output diode connected between the second output terminals of the first and second rectifier circuits; and a first output switch connected between the second output terminal of the first rectifier circuit and the first output terminal of the second rectifier circuit.