Electric Power Conversion Device With Auxiliary Coil Bypass
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric power conversion devices face issues when it is necessary to avoid power supply through the transformer, often due to incorrect excitation or magnetization of the choke coil, leading to potential excess currents and inefficiencies.
Innovation Solution
An electric power conversion device with a control part that prevents magnetic flux in the primary coil and blocks current in the secondary coil, utilizing a specific power supply path through the choke coil and auxiliary coil to bypass the transformer, ensuring reliable power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is supplied through the transformer having the primary coil and secondary coil, then power conversion is achieved, but magnetic flux generation in the primary coil causes excess currents when incorrect excitation or magnetization occurs
Solution Approach 1:
The patent divides the power supply path into two separate paths: one through the transformer (primary coil and secondary coil) and another through the choke coil and auxiliary coil. This segmentation allows the system to switch between paths based on operational conditions, isolating the harmful magnetic flux effects to only the transformer path while maintaining reliable power supply through the alternative path.
Solution Approach 2:
The choke coil and auxiliary coil act as intermediary components that provide an alternative power transmission path. When the transformer path is compromised by magnetic flux issues, the intermediary path through the choke coil and auxiliary coil takes over to ensure continuous and safe power supply without excess currents.
2Productivity
If the choke coil is used for power supply, then power transmission is achieved, but the choke coil may not be correctly excited or magnetized leading to inefficiency
Solution Approach 1:
The patent merges the transformer path and the choke coil path into a unified power conversion system with a control unit that manages both paths. This merging allows the system to evaluate both paths and select the most efficient one while ensuring reliable operation through coordinated control of both excitation paths.
3Object-generated harmful factors
If a control mechanism is added to prevent magnetic flux in the primary coil, then excess current is prevented, but device complexity increases
Solution Approach 1:
The control unit is designed to perform multiple functions: it controls the switching elements for the transformer path, monitors the operational state of both power paths, and manages the alternative path through the choke coil and auxiliary coil. This multi-functionality reduces the need for separate dedicated control mechanisms for each function, thereby limiting the increase in device complexity.
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 allows for correct power supply from the input to the output through a specific path, preventing transformer usage when necessary, thus enhancing efficiency and preventing excess currents due to incorrect excitation or demagnetization.
Implementation Method 1
a transformer having a primary coil and a secondary coil magnetically connected together
Implementation Method 2
The auxiliary coil is magnetically connected to the choke coil
Data Source
AI summary
An electric power conversion device supplies electric power of a DC power source from an input part to an output part through a power conversion circuit having a transformer and switches. The transformer has primary and secondary coils magnetically connected. The device has a choke coil, an auxiliary coil and a control part. The auxiliary coil is connected to the output part and magnetically connected to the choke coil. The auxiliary coil is wound to allow a current to flow from a negative-electrode side to a positive-electrode side of the output part when a current flows from the power source to the choke coil. The control part performs a switching control of the switches to supply electric power of the source to the output part through the auxiliary coil to prevent generation of magnetic flux in the primary coil and the current from flowing in the secondary coil.