Target Voltage Generator for DC to DC Converter Regulation
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Solution Overview
Problem
Switching DC to DC converters experience degraded output voltage regulation due to performance degradation and responsiveness issues, particularly when load currents change rapidly or when the converter is heavily loaded.
Innovation Solution
A target voltage generator is introduced, which compares the output voltage of the DC to DC converter with a second reference voltage and uses the result to modify the first reference voltage, allowing for compensation and improved regulation through a dual control loop system, where one loop is slower than the other to address delays and stability needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If switching converters are used to improve efficiency, then energy loss is reduced, but output voltage regulation deteriorates under certain circumstances
Solution Approach 1:
The patent implements a dual feedback control system where a first control loop compares output voltage with a first reference voltage for basic regulation, and a second control loop compares output voltage with a second reference voltage to generate correction signals that adjust the first reference voltage. This nested feedback structure allows the system to maintain efficient switching operation while compensating for regulation errors through the outer control loop, thus resolving the contradiction between energy efficiency and voltage regulation reliability.
2Reliability
If the control loop response time is increased to improve regulation accuracy, then voltage regulation improves, but responsiveness to load changes deteriorates
Solution Approach 1:
The patent divides the control system into two segmented control loops with different response characteristics. The first control loop operates with faster response time for immediate load change correction, while the second control loop operates slower to provide accurate regulation and generate reference voltage adjustments. This segmentation allows each loop to optimize for its specific function, resolving the contradiction between regulation accuracy and responsiveness.
Solution Approach 2:
The system dynamically adjusts the first reference voltage based on output from the second control loop, creating a adaptive control mechanism. The first control loop responds dynamically to load changes with fast response, while the second loop dynamically modifies the reference voltage to maintain accuracy. This dynamic interaction between loops resolves the contradiction by allowing fast response when needed while maintaining regulation accuracy through continuous reference adjustment.
Data Source
AI summary
A target voltage generator for use with a DC to DC converter, the DC to DC converter having a first input for receiving a voltage to be converted, an output for outputting a converted voltage, a first reference voltage input for receiving a first reference voltage and a controller arranged to compare the output voltage of the DC to DC converter with the first reference voltage and to modify the operation of the DC to DC converter so as to reduce a difference between the output voltage and the first reference voltage; the target voltage generator comprising a circuit arranged to compare the output voltage of the DC to DC converter with a second reference voltage and to use a result of the comparison to generate or modify the first reference voltage.