Power Source Voltage Stabilization Using PID Feedback Control
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Solution Overview
Problem
Existing power sources in electronic devices often produce unstable output voltages, which can lead to safety hazards such as short circuits, causing damage to devices and resulting in economic losses and potential casualties.
Innovation Solution
An apparatus comprising a sampling module, a PID adjustment module, and a control module is used to adjust the voltage stabilization output of a power source. The sampling module samples the output voltage, the PID adjustment module performs PID control adjustments based on the sampled voltage and preset control parameters to generate a switching frequency signal, and the control module forms a supply current according to this signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional power supply control methods are used, then the device complexity is low, but the output voltage stability is poor leading to safety hazards
Solution Approach 1:
The patent implements a closed-loop feedback control system where the output voltage is continuously sampled and fed back to the PID adjustment module. The sampling module monitors the actual output voltage, compares it with the reference voltage, and adjusts the supply current through PID control to maintain stable output, resolving the contradiction between reliability and complexity by using intelligent feedback mechanisms.
Solution Approach 2:
The patent dynamically adjusts control parameters (proportional gain, integral gain, differential gain) in the PID controller based on system conditions. By changing these parameters adaptively, the system achieves optimal voltage stabilization performance while managing the complexity through parameter optimization rather than structural complexity.
2Reliability
If no voltage stabilization control is implemented, then the device complexity is low, but the output voltage fluctuates causing short circuits and safety hazards
Solution Approach 1:
The feedback mechanism continuously monitors output voltage and adjusts supply current in real-time to prevent voltage fluctuations that could cause short circuits. The sampling module detects voltage deviations, and the PID controller corrects them before they lead to safety hazards, ensuring power supply safety through active feedback control.
Solution Approach 2:
The system performs preliminary voltage stabilization control by adjusting the supply current before output voltage deviations can cause harmful effects. The PID controller proactively corrects voltage fluctuations at early stages, preventing short circuits and safety issues before they occur.
3Manufacturing precision
If simple output control is used, then the control system is simple, but the manufacturing precision of output voltage is poor
Solution Approach 1:
The sampling module precisely measures the output voltage and feeds it back to the PID controller, which adjusts the supply current with high precision. This feedback loop enables accurate voltage control by continuously comparing actual output with reference values and making precise corrections, achieving high manufacturing precision through intelligent control.
Solution Approach 2:
The PID controller dynamically adjusts control parameters (Kp, Ki, Kd) to optimize voltage control precision. By changing these parameters adaptively, the system achieves precise output voltage control while managing complexity through parameter optimization rather than hardware complexity.
Data Source
AI summary
An apparatus, method and system for adjusting a voltage stabilization output of a power source (10). The power source (10) forms an output voltage based on a supply current. The apparatus includes a sampling module (11), a PID adjustment module (12) and a control module (13). The sampling module (11) is configured to sample the output voltage of the power source (10) to obtain a sampled voltage (S100). The PID adjustment module (12) is configured to obtain a switching frequency signal by PID control adjustment based on the sampled voltage and a preset control parameter. The PID control adjustment includes a voltage loop control adjustment and a voltage-difference-change-rate loop control adjustment (S200). The control module (13) is configured to form the supply current according to the switching frequency signal (S300). The voltage stabilization output of the power source (10) can be realized.