Multi-Input DC Converter With Tapped Transformer Primary
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DC/DC converters require multiple components and complex control systems to handle multiple power sources, leading to high circuit costs and complexity, and they fail to efficiently manage voltage waveform oscillations in PFC circuits.
Innovation Solution
A two-input DC converter design that uses a transformer with a primary winding divided into sections by taps, connected through diodes and a switching transistor, allowing power supply from one or both input sources with reduced component count and oscillation, and applied to PFC circuits to improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate DC/DC converters are used to implement power supply from two DC input sources, then power supply capability is achieved, but circuit complexity and cost increase
Solution Approach 1:
The patent combines two separate DC/DC converter circuits into a single integrated converter by sharing the transformer, switching transistor, diode, filter capacitor, and control circuit. The primary winding is divided into two sections that can accept two different DC input sources, allowing both sources to power the same load through one unified circuit structure, thereby reducing component count and complexity while maintaining dual power supply capability
Solution Approach 2:
The transformer's primary winding is designed with a tap point that enables it to serve multiple functions: it can accept voltage from the first DC input source through the first section, accept voltage from the second DC input source through the second section, or combine both inputs. This multi-functional design allows a single transformer to replace what would traditionally require two separate transformers, reducing overall circuit complexity
2Adaptability or versatility
If a two-input DC converter circuit is designed with multiple switching transistors, then power supply from two sources is achieved, but component count and control complexity increase
Solution Approach 1:
The patent merges the switching functions into a single switching transistor that controls the combined primary winding. Instead of using separate switching transistors for each input source, one transistor manages the switching operations for both sections of the primary winding, thereby reducing the component count while maintaining the ability to process inputs from both DC sources
Solution Approach 2:
The primary winding is segmented into two sections with a tap point, allowing each section to be connected to a different DC input source. This segmentation enables the transformer to accept multiple inputs without requiring multiple complete converter circuits, as each winding section can independently receive power from its designated source while sharing the rest of the circuit components
3Productivity
If traditional DC/DC converter is used in PFC circuit, then power conversion is achieved, but voltage waveform oscillation increases
Solution Approach 1:
The patent modifies the electrical parameters of the converter by using a transformer with a tapped primary winding that allows for optimized voltage transformation ratios. This parameter change enables better voltage waveform management in the PFC circuit, reducing oscillations while maintaining efficient power conversion. The ability to select different input sections based on voltage levels helps stabilize the output waveform
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 simplifies the circuit structure, reduces costs, and effectively manages voltage waveform oscillations in PFC circuits by efficiently switching between input sources, enhancing overall converter efficiency and reducing energy waste.
Implementation Method 1
the transformer (T) comprises a primary winding and a secondary winding... the secondary winding delivers energy to the rectifier and filter circuit
Data Source
AI summary
The application discloses a multi-input DC converter and a PFC circuit. The multi-input DC converter of the application includes n diodes, a transformer, a switching transistor, a rectifier and filter circuit, and a load. The transformer includes a primary winding and a secondary winding, the number of turns of the primary winding is N1, and the primary winding is divided into n sections by leading out n−1 taps in a specific manner; anodes of the n diodes are respectively connected to n input sources in turn, cathodes of the n diodes are respectively connected to a first terminal of the primary winding and n−1 tap terminals in turn, a second terminal of the primary winding is grounded through the switching transistor, and the secondary winding delivers energy to the rectifier and filter circuit and then to the load. The structure is simple, and the cost is low.