DC-DC Converter Control Device Using Polynomial Input Voltage Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
DC-DC converters face challenges in maintaining a constant output voltage due to variations and disturbances in the input voltage, such as ripples, which conventional regulation methods fail to compensate for in real-time.
Innovation Solution
A control device calculates an estimated value for the input voltage using a polynomial, determining a controlled variable that can compensate for these disturbances, allowing for a more stable output voltage by adjusting parameters like pulse duty factor and phase angle in the DC-DC converter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional regulation methods are used to maintain output voltage, then the output voltage can be kept stable under ideal conditions, but the regulation cannot compensate for input voltage disturbances in real-time due to finite delay
Solution Approach 1:
The system calculates an estimated value for the disturbed input voltage in advance using a polynomial function based on measured input voltage values. This preliminary estimation allows the control device to determine the controlled variable before the actual disturbance occurs, compensating for the finite delay in conventional regulation and maintaining output voltage stability.
2Reliability
If the input voltage is estimated using a polynomial calculation, then the compensation for input voltage disturbances is improved, but the computational complexity increases
Solution Approach 1:
The system uses a polynomial function with predetermined degree to calculate the estimated input voltage value. By changing the mathematical representation from direct measurement to polynomial-based estimation, the system achieves better disturbance compensation while keeping the computational structure systematic and manageable through parameter optimization.
Data Source
Figure 1~3
Figure 2
AI summary
The invention relates to a control system for a DC-to-DC converter. Variations in the input voltage of the DC-to-DC converter are compensated by means of an estimated value being calculated for the variations, and a control variable being determined for the DC-to-DC converter based on the estimated values of the input voltage. The estimated values for the input voltage can, for example, be determined on the basis of a polynomial, for example using a Lagrange expansion.