Power Converter Controller Timing for Noise-Free Parameter Sampling
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Solution Overview
Problem
Accurate sampling of parameters in power converter devices is challenging due to electrical noise generated during switching operations, leading to incorrect parameter measurements and errors in controlling the device.
Innovation Solution
A controller configured to sample parameters after a predetermined time period following the switching of a switching component, using a timer arrangement to delay sampling and minimize electrical noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If parameters are sampled immediately during switching operations, then sampling frequency is improved, but measurement precision deteriorates due to electrical noise
Solution Approach 1:
The controller performs preliminary action by initiating a delay period after switching before sampling parameters. The timer arrangement is activated upon detecting the switching event, and sampling is scheduled to occur only after the predetermined time period has elapsed, ensuring that parameter measurement occurs during a noise-free window following the switching transient.
Solution Approach 2:
The controller skips the noisy period immediately following switching by implementing a predetermined delay before sampling. This allows the electrical noise to subside naturally during the delay period, and sampling occurs only after the noise has dissipated, thus achieving accurate measurements without being affected by the transient noise.
2Measurement precision
If parameters are sampled after a delay following switching, then measurement precision is improved, but loss of time occurs
Solution Approach 1:
The predetermined time period is made adjustable rather than fixed, allowing optimization of the delay duration based on specific application requirements. The controller can be configured with different delay values to balance between allowing sufficient noise dissipation time and minimizing the sampling delay, thus adapting to different system characteristics and performance requirements.
Data Source
AI summary
A controller for a power converter device, wherein the controller is configured to provide for switching of a switching component of the power converter device based on a feature in a control signal, sample at least one parameter of the power converter device upon expiry of a predetermined time period after switching of the switching component; and output the sample of the at least one parameter.