Power Converter Switching Control for Single Storage Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical power converters face challenges in reducing switching loss when operating in modes where only one electricity storage apparatus is used, as the controlling methods previously disclosed do not effectively cancel currents to minimize switching losses.
Innovation Solution
The electrical source system employs a control apparatus that manages the switching states of switching elements in the power converter, keeping one switching element in an ON state while changing the other, reducing the number of switching operations and thus minimizing switching loss without relying on current cancellation between electricity storage apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electrical power converter operates in a mode using only one electricity storage apparatus, then the system can maintain operational flexibility and adaptability, but the switching loss increases because current cancellation between apparatuses cannot occur
Solution Approach 1:
The invention changes the switching control parameters by selectively keeping one switching element in ON state while changing another, adapting the switching pattern based on the single-apparatus operation mode to reduce switching losses
Solution Approach 2:
The control apparatus dynamically adjusts the switching states of switching elements based on real-time operational conditions, transitioning between different switching patterns to optimize performance for single-apparatus operation
2Ease of operation
If the switching state of multiple switching elements is changed simultaneously, then the electrical power conversion can be controlled effectively, but the switching loss and heat generation increase
Solution Approach 1:
The invention segments the switching control into distinct stages by separating the control of different switching elements in time, with one element kept in ON state while another is switched, thereby reducing simultaneous switching events and associated losses
Data Source
AI summary
An electrical source system has an electrical power converter which has a plurality of switching elements and performs an electrical power conversion with first and second electricity storage apparatus; and a control apparatus which controls an operation of the electrical power converter, when the electrical power converter performs the electrical power conversion with one electricity storage apparatus, the control apparatus controls the electrical power converter to change a switching state of one of two switching elements while keeping a switching state of the other one of the two switching elements in an ON state, each of two switching elements constitutes predetermined arm element whose switching state should be changed to perform the electrical power conversion with the one electricity storage apparatus.