Isolated DC-DC Converter Control for Faster Vehicle Simulation
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Solution Overview
Problem
Existing power-electronics DC voltage converters for vehicles, particularly in electric vehicles, face challenges in computationally efficient simulation and reliable power supply for safety-related components due to high-frequency actuation, necessitating improved simulation models and control methods.
Innovation Solution
Employing a BWHH algorithm to adjust reference variables and control parameters for power-electronics DC voltage converters with galvanic isolation, utilizing a controller to enhance the efficiency and accuracy of simulation models, particularly for safety-related components in vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-frequency actuation is used in power-electronics DC voltage converters, then power conversion efficiency and responsiveness are improved, but simulation computational complexity and time requirements increase significantly
Solution Approach 1:
The patent creates a simplified simulation model that copies the essential behavior of the high-frequency power converter without replicating every switching detail. The controller model reproduces the input-output characteristics and control logic sufficient for system-level simulation, eliminating the need to compute actual switching waveforms while maintaining accuracy for power supply analysis.
Solution Approach 2:
The patent extracts only the necessary control functions and input-output relationships from the complete power converter system. By separating the controller logic from the detailed switching implementation, the simulation model retains essential power conversion behavior while removing computationally intensive switching calculations.
2Measurement precision
If detailed switching models are used for DC voltage converters, then simulation accuracy is improved, but computational efficiency deteriorates
Solution Approach 1:
The patent applies different levels of modeling detail to different parts of the system. The controller is modeled with sufficient detail to capture control logic and regulation behavior, while the power switching elements are represented by simplified equivalent circuits that provide adequate accuracy for system-level analysis without requiring detailed switching waveform calculations.
3Reliability
If complete switching process simulation is performed, then model reliability is improved, but simulation time increases excessively
Solution Approach 1:
The patent performs preliminary analysis to identify which aspects of the switching process are critical for power supply reliability and which can be simplified. The controller model is designed beforehand to incorporate essential protection functions, fault detection logic, and regulation mechanisms that ensure reliable operation, while detailed switching simulations are avoided unless specifically needed for component-level analysis.
Data Source
AI summary
A method for actuating a power-electronics DC-DC converter that is operated by a controller and has a primary side with at least two electronic switches and a secondary side, galvanically isolated therefrom, with at least one electronic switch, wherein in the method, a reference variable and/or control parameters for the controller is/are adjusted by a BWHH algorithm. Also disclosed are a controller for controlling a power-electronics DC-DC converter that is configured to carry out the method.