Multi-phase Power Supply Interleaving Control via Dead Beat Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power supply devices for RF applications face challenges in achieving rapid and stable two-level pulse power control across a wideband frequency range due to secondary oscillations and complexity in multi-phase interleaving control, particularly with PI control systems, which limit response speed and stability.
Innovation Solution
The implementation of dead beat control in a power supply device using combined phase current values for constant current control, eliminating the need for multiple detectors and simplifying control systems, while ensuring stability and rapid response through careful selection of parameters like Av and β3 to prevent overshooting and undershooting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multi-phase interleaving control is applied to achieve wideband pulse power control, then response speed is improved, but secondary oscillations and overshoot/undershoot occur causing instability
Solution Approach 1:
The patent implements a feedback control mechanism where the output voltage is detected and fed back to the controller. The controller adjusts the pulse width of switching signals based on the detected output voltage to maintain stability and prevent overshoot/undershoot while achieving rapid response through multi-phase interleaving control
Solution Approach 2:
The patent employs dynamic pulse width modulation where the pulse width of switching signals is continuously adjusted based on feedback. This dynamic control allows the system to achieve rapid response while maintaining stability by adapting the switching characteristics in real-time
2Stability of the object's composition
If constant voltage control based on output voltage feedback is used, then output voltage stability is improved, but response speed decreases due to low-speed control response settings
Solution Approach 1:
The patent uses periodic switching actions in multi-phase interleving control where multiple phases switch at different intervals. This periodic switching achieves both rapid response and stability by distributing the control action across multiple phases with optimized switching frequencies
Solution Approach 2:
The patent changes control parameters dynamically by adjusting pulse width based on feedback rather than using fixed low-speed control settings. This parameter change approach enables the system to achieve both rapid response and stability by optimizing control characteristics in real-time
3Measurement precision
If multiple detectors are used for monitoring phase current values in multi-phase interleaving system, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the detection function into a single detector that monitors the combined output rather than requiring separate detectors for each phase. This combining approach maintains measurement precision for control purposes while significantly reducing device complexity and the number of components required
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3(a)~3(d)
AI summary
Multi-phase interleaving control in a power supply device is accelerated. In addition, in accelerating the multi-phase interleaving control in the power supply device, acceleration in detecting a feedback signal and stabilization of a control system in a high-frequency band are promoted. Eliminating the need of the feedback signal according to a slow response detector, and using a detection signal obtained by a detector for detecting an AC signal capable of rapid response, thereby accelerating the multi-phase interleaving control in the power supply device. Then, the control system is stabilized, by satisfying a condition where gain is equal to 1 or less in a transfer function of the control system including an LC circuit, and a condition where a phase shift caused by dead time of switching time does not affect the sampling cycle.