Multi-Input High-Frequency Link Inverter Circuit Topology
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Solution Overview
Problem
Traditional multi-input inverter systems for new energy sources suffer from two-stage power conversion, low power density, low conversion efficiency, and high cost, limiting their practicality in distributed power supply systems.
Innovation Solution
A multi-winding single-stage multi-input boost type high-frequency link's inverter with simultaneous/time-sharing power supplies is developed, featuring multiple isolated high-frequency inverter circuits connected through a multi-input single-output high-frequency transformer, sharing a common output cycloconverter and filter circuit, allowing for simultaneous or time-sharing power supply from various new energy sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional multi-input inverter systems are used for new energy sources, then power conversion can be achieved, but the system suffers from two-stage power conversion, low power density, low conversion efficiency, and high cost
Solution Approach 1:
The patent merges multiple input power sources into a single-stage inverter circuit with a unified power conversion path. The multi-input inverter integrates DC-AC conversion functions for multiple new energy sources (photovoltaic, wind, fuel cell) into one consolidated circuit architecture, eliminating the need for separate DC-DC converters and reducing the number of power conversion stages from two to one, thereby improving efficiency and reducing complexity
Solution Approach 2:
The inverter circuit is designed with universal multi-functionality to handle multiple types of new energy input sources simultaneously. The circuit topology accommodates different voltage levels and power ratings from various sources through a unified control strategy, enabling single-stage power conversion for all inputs and eliminating the need for source-specific conversion circuits
2Power
If traditional multi-input inverter systems are used, then power conversion is achieved, but power density is low and cost is high
Solution Approach 1:
The patent consolidates multiple power conversion functions into a single integrated circuit module. By merging the DC-AC inversion functions for multiple power sources into one unified inverter circuit with shared components (transformer, switches, control circuitry), the system achieves higher power density through component sharing and reduced overall circuit footprint while maintaining the ability to process multiple input sources
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 solution simplifies the circuit structure, achieves high power density and efficiency, reduces input current ripple, and broadens application prospects by converting unstable input direct voltages into stable high-quality AC power, enhancing system stability and flexibility.
Implementation Method 1
a multi-input single-output high-frequency transformer... Each input end of the multi-input single-output high-frequency transformer is respectively connected to the output end of each high-frequency inverter circuit
Data Source
AI summary
A multi-winding single-stage multi-input boost type high-frequency link's inverter with simultaneous/time-sharing power supplies, having the circuit structure formed by connecting a plurality of mutually isolated high-frequency inverter circuits having an input filter and an energy storage inductor, a common output cycloconverter and filter circuit by a multi-input single-output high-frequency transformer. Each input end of the multi-input single-output high-frequency transformer is connected in one-to-one correspondence to the output end of each high-frequency inverter circuit. The output end of the multi-input single-output high-frequency transformer is connected to the input end of the output cycloconverter and filter circuit. The inverter has the following characteristics: multiple input sources are connected to a common ground or a non-common ground. The multiple input sources supply power to load in a simultaneous/time-sharing manner. The output and input high-frequency isolation is performed. The output cycloconverter and filter circuit is shared.