Switch Power Dynamic Response Control via Predictive Mode Adjustment
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Solution Overview
Problem
Existing switch power control methods face challenges in achieving high dynamic performance, leading to overshoot, undervoltage, and prolonged dynamic recovery times, especially when switching between different load modes, which can cause system instability and voltage oscillations.
Innovation Solution
A control method incorporating a sampling module, dynamic control module, PID module, mode control module, and PWM module, which includes a voltage monitoring module with comparators and a slope calculation module to determine dynamic modes (LTH and HTL) for rapid voltage stabilization, reducing the need for frequent mode switching and improving stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multi-mode control method is used to improve efficiency, then energy efficiency is improved, but dynamic response performance deteriorates
Solution Approach 1:
The patent predicts future load conditions and pre-adjusts working modes before actual load changes occur. By analyzing historical load data and predicting future states, the system prepares control parameters in advance, enabling faster response to load transitions without waiting for voltage deviations to occur.
Solution Approach 2:
The patent dynamically adjusts switching frequency and working modes based on real-time load conditions and predicted future states. The system transitions between different working modes (PFM, PWM, DPWM, DPFM) adaptively, optimizing both efficiency and dynamic response by matching the control strategy to the specific operating conditions.
2Loss of energy
If switch frequency is decreased to reduce circuit losses, then energy loss is reduced, but voltage recovery time increases
Solution Approach 1:
The patent dynamically adjusts switching frequency based on real-time operating conditions. During normal operation, lower frequencies reduce circuit losses, while during transient load changes, the system automatically increases frequency to accelerate voltage recovery, thus optimizing the trade-off between energy efficiency and dynamic response.
Solution Approach 2:
The patent changes switching frequency as a controllable parameter to balance energy loss and voltage recovery time. By adjusting this key parameter based on load conditions and predictions, the system achieves optimal performance across different operating scenarios.
3Adaptability or versatility
If mode switching is implemented to adapt to different loads, then adaptability is improved, but system stability deteriorates due to repeated switching
Solution Approach 1:
The patent predicts future load conditions and determines optimal working modes in advance, reducing the need for frequent mode switching. By preparing control strategies beforehand based on load predictions, the system maintains stability while still adapting to changing conditions.
Solution Approach 2:
The patent uses feedback from voltage monitoring and load analysis to make informed mode switching decisions. The system continuously monitors operating conditions and only switches modes when predictions indicate sustained load changes, avoiding unnecessary transitions that would destabilize the system.
4Device complexity
If sampling is conducted once per cycle to simplify control, then device complexity is reduced, but dynamic response speed deteriorates
Solution Approach 1:
The patent performs preliminary analysis of load conditions and predicts future states, enabling the system to prepare control actions in advance. This predictive approach allows the system to respond dynamically to load changes without requiring multiple samples per cycle, maintaining simple control architecture while improving response speed.
Data Source
AI summary
A control method for improving dynamic response of switch power is based on a closed-loop control system comprising a sampling module, a dynamic control module, an error calculation module, a PID module, a mode control module, and a PWM module. The sampling module samples an output voltage Vo, and the dynamic control module compares the output voltage Vo with a set maximum voltage Vomax, a set minimum voltage Vomin, and a reference voltage Vref, so as to determine whether to adopt a dynamic mode. In the dynamic mode, when the output voltage Vo changes greatly, the output voltage Vo is rapidly restored to a stable voltage by inputting large power or small power.