Electric Power Converter Voltage Regulation via Chopper and DC-DC Control
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Solution Overview
Problem
Conventional electric power converters have complex configurations due to multiple boost choppers, which complicates their design and operation.
Innovation Solution
An electric power converter with a simple configuration, featuring a chopper circuit, two DC-DC converters, transformers, capacitors, and rectifier circuits, where the output voltage is adjusted by controlling the powering times of the DC-DC converters and the chopper circuit, allowing for efficient voltage regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple boost choppers are used to convert DC power to predetermined voltage, then voltage regulation capability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple DC-DC converter functions into a single integrated converter that can output multiple voltage levels. Instead of using separate boost choppers for different voltage outputs, the invention uses one DC-DC converter with multiple secondary coils and rectifier circuits, merging multiple functions into a single device while maintaining voltage regulation capability for diverse loads.
Solution Approach 2:
The single DC-DC converter is designed to perform multiple functions by providing different voltage outputs through its multiple secondary coils. The converter can simultaneously or independently provide first output voltage and second output voltage to different loads, making one device universal for multiple voltage regulation needs without requiring separate converters for each function.
2Productivity
If multiple boost choppers with simultaneous switching are used, then power conversion efficiency is improved, but control complexity increases
Solution Approach 1:
The patent implements dynamic control of the DC-DC converter's switching operations to optimize power conversion efficiency. The controller adjusts switching parameters and powering times based on load conditions and desired output voltages, enabling efficient power conversion without requiring simultaneous switching of multiple independent choppers. The dynamic adjustment of switching parameters maintains high efficiency while simplifying control compared to coordinated multi-chopper switching.
3Quantity of substance
If a single boost coil is used in common by multiple boost choppers, then component quantity is reduced, but reliability decreases
Solution Approach 1:
The patent segments the power conversion function into multiple independent secondary coils within the DC-DC converter, each with its own rectifier circuit. Instead of using a single shared boost coil that serves multiple choppers, the invention provides separate magnetic paths and secondary coils for different output voltages, isolating potential failure points and improving reliability while maintaining reasonable component quantity through the integrated converter structure.
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 enables efficient voltage adjustment and simplifies the configuration of the electric power converter, improving its operational efficiency and ease of use while maintaining effective voltage regulation for diverse loads.
Implementation Method 1
a chopper circuit that converts DC power into DC power at a predetermined voltage
Implementation Method 2
a DC-DC converter coupled to an output side of the chopper circuit
Implementation Method 3
a first transformer, coupled to an output side of the DC-DC converter, and including a first primary coil and a first secondary coil
Implementation Method 4
a first rectifier circuit coupled to the first secondary coil
Data Source
AI summary
An electric power converter includes a chopper circuit, a DC-DC converter coupled to an output of the chopper circuit, a first transformer including a first primary coil and a first secondary coil, a second transformer including a second primary coil and a second secondary coil, a first capacitor coupled between an output of the DC-DC converter and the first primary coil, a second capacitor coupled between the output of the DC-DC converter and the second primary coil, a first rectifier circuit coupled to the first secondary coil, and a second rectifier circuit coupled to the second secondary coil. A first output voltage of the first rectifier circuit is adjusted by adjusting an output voltage of the chopper circuit, and a second output voltage of the second rectifier circuit is adjusted by adjusting a powering time during one switching period of the DC-DC converter.