Regulator High Speed Nonlinear Compensation Mode Chatter
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Solution Overview
Problem
Battery charger systems face instability and 'chatter' issues when switching between operating modes due to high proportional gain settings, leading to insufficient transient response and potential system instability.
Innovation Solution
A regulator with high-speed nonlinear compensation is implemented, which limits the proportional compensator gain and increases both proportional and integral compensator gains during limit conditions, allowing for fast transient response while preventing mode oscillation or chatter during mode transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high proportional gain is used in the compensator, then transient response speed is improved, but system stability deteriorates causing chatter during mode transitions
Solution Approach 1:
The patent implements dynamic gain adjustment where the proportional gain is limited to a maximum value during normal operation, and the integral gain is boosted during limit conditions. This dynamic adaptation allows the system to maintain stability during mode transitions while achieving fast transient response when needed, directly resolving the contradiction between speed and stability.
Solution Approach 2:
The patent changes the compensator parameters (proportional and integral gains) based on operating conditions. By limiting the proportional gain parameter and conditionally boosting the integral gain parameter, the system optimizes performance across different operating modes, resolving the trade-off between transient response speed and system stability.
2Stability of the object's composition
If proportional gain is limited to avoid chatter, then stability is improved, but transient response becomes insufficient
Solution Approach 1:
The patent dynamically adjusts the integral gain based on whether the system is in a limit condition. During limit conditions (when proportional gain is maximum), the integral gain is boosted to compensate for the limited proportional gain, ensuring fast transient response is maintained even while stability is prioritized during mode transitions.
Solution Approach 2:
The patent introduces an intermediary mechanism (the conditional integral gain boost) that mediates between the limited proportional gain and the need for fast transient response. This intermediary allows the system to achieve both stability during mode transitions and sufficient transient response performance.
Data Source
AI summary
An apparatus including a proportional gain circuit, an integral gain circuit, a limit circuit, a gain booster circuit and a combiner. The gain circuits apply a proportional gain and an integral gain to an error signal, and the combiner combines both gained error signals to provide a control signal. The limit circuit applies a limit function that limits the proportional gain to a magnitude. The gain booster circuit increases gain while the limit function is being applied. The increased gain may be applied to only the integral gain, or to both the integral and proportional gains such as by boosting gain of the error signal. The apparatus may be a regulator that may include multiple control loops providing multiple error signals, in which a mode selector selects one of the error signals to control regulation. The limit function increases stability while the boosted gain improves transient response during mode transitions.