Time-Based Switching Control for Integrating Regulators
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Solution Overview
Problem
Existing integrating circuits, such as switching regulators, are vulnerable to input voltage transients and require complex control logic to stabilize the system, especially when using One Cycle Control, which complicates the control methodology.
Innovation Solution
A time-based controller that includes a comparator to detect polarity changes, time calculation logic to determine when to change the control signal state, and a modulator to implement bang-bang control, ensuring the average value of the output is maintained by adjusting the switch state based on sensed and reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If One Cycle Control is used to stabilize the system, then stability is improved, but control logic complexity increases
Solution Approach 1:
The patent changes the control parameter from duty cycle (conventional control) to time interval (One Cycle Control). By controlling the time interval between consecutive switch turn-on events based on the integrator output crossing a reference voltage, the system achieves stable operation with simpler logic that only requires comparing voltages and timing events, rather than complex duty cycle calculations.
Solution Approach 2:
The patent implements feedback by monitoring the integrator output voltage and using it to determine when to trigger the next switch turn-on event. When the integrator output crosses the reference voltage, it triggers a time interval measurement that controls the next switching event, creating a closed-loop feedback mechanism that stabilizes the system.
2Reliability
If complex control logic is used to handle input voltage transients, then response to transients is improved, but vulnerability to electromagnetic interference increases
Solution Approach 1:
The patent uses simple, robust voltage comparison and timing events rather than complex control algorithms. The control mechanism relies on basic comparator circuits and time interval measurements that are inherently more resistant to electromagnetic interference, replacing vulnerable complex logic with simpler, more resilient components.
Data Source
AI summary
A time-based controller provides control for a controlled system including a plant having an integration response. The time-based controller includes a comparator that detects a polarity change in a comparison of a sensed signal from the plant and a reference signal while a control signal is in a first state, time calculation logic that, responsive to detection of the change in the comparison, determines a time at which to change a state of a control signal supplied to the plant, and a modulator that, at the determined time, changes the state of the control signal supplied to the plant from the first state to a second state.