Inductive Charger Current Limit Control for Power Regulation
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Solution Overview
Problem
Conventional power regulators struggle to effectively manage rapid changes, overshoots, or spikes in power characteristics due to unpredictable changes in load requirements, leading to current overshoot issues in inductive charger devices.
Innovation Solution
A method and system that detect changes in input current of an inductive charger device, modifying its operating state using first and second input current limit parameters based on total input current limit and current division parameters, and switching between these limits during specific time periods to mitigate current overshoot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power regulators are used to manage rapid changes in load requirements, then the system can handle basic power regulation, but current overshoot and spikes occur leading to unstable power characteristics
Solution Approach 1:
The system performs preliminary detection of load changes and preemptively adjusts the current limit parameter before the overshoot can occur. The controller detects changes in input current and proactively modifies the operating state according to predetermined current limit parameters, preventing the harmful overshoot effect before it happens.
Solution Approach 2:
The patent implements dynamic adjustment of the current limit parameter based on real-time detection of input current changes. The controller continuously monitors load conditions and modifies the current limit parameter accordingly, transitioning between different operating states to maintain stable power characteristics under varying load requirements.
2Reliability
If the current limit parameter is adjusted rapidly in response to load changes, then current overshoot is reduced, but the complexity of the control system increases
Solution Approach 1:
The control system is segmented into distinct functional modules: a detection module that monitors input current changes, a control module that processes the detected changes, and an execution module that adjusts the current limit parameter. This modular segmentation allows for manageable complexity while achieving effective overshoot reduction through coordinated operation of the segments.
Data Source
AI summary
Example implementations include a method of reducing current overshoot in a power regulator device, by detecting a change in an input current of an inductive charger device in response to a change in load on the inductive charger device, modifying an operating state of the inductive charger device in accordance with a first input current limit parameter based on a total input current limit parameter and a current division parameter, in response to the detecting the change in the input current, operating the inductive charger device in accordance with the first input current limit during a current limit period subsequent to the detecting the change in the input current, modifying the operating state of the inductive charger device in accordance with a second input current limit parameter based on the total input current limit parameter and the current division parameter, subsequent to the current limit period, and operating the inductive charger device in accordance with the second input current limit subsequent to the current limit period.