Multiphase Power Supply Control for Stable Phase Switching
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Solution Overview
Problem
Existing multiphase power supply control methods fail to achieve fast and accurate control, particularly during phase-conversion changes, due to inadequate adjustment of compensation signals based on the number of active power conversion circuits and total output current.
Innovation Solution
A control circuit and method that adjusts a first compensation signal using a scaling factor and voltage signal to generate a current reference signal, accounting for the ratio of active power conversion circuits and total output current, enabling precise control of each phase to stabilize and quickly respond to phase changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If existing control methods are used for multiphase power supply, then the control circuit structure is simple, but the response speed during phase-conversion changes is slow and control accuracy is poor
Solution Approach 1:
The patent implements dynamic phase-conversion control by detecting the number of actively working power conversion circuits and dynamically adjusting the compensation signal. The control circuit transitions from static compensation to dynamic compensation that adapts to real-time operational states, enabling fast response during phase-conversion changes while maintaining control accuracy.
Solution Approach 2:
The patent introduces a feedback mechanism that detects the operational state of power conversion circuits and feeds this information back to adjust the compensation signal. This closed-loop feedback enables the control circuit to automatically adapt to phase-conversion changes, improving response speed without requiring complex external control systems.
2Stability of the object's composition
If the compensation signal is not adjusted according to the number of active power conversion circuits, then the control method is simple, but the phase-conversion stability is poor and output current consistency is bad
Solution Approach 1:
The patent changes the compensation signal parameter dynamically based on the number of actively working power conversion circuits. By adjusting the compensation signal magnitude according to operational phase, the system maintains stable output current during phase-conversion transitions. This parameter adaptation resolves the contradiction by implementing a simple yet effective adjustment rule rather than complex control logic.
3Measurement precision
If existing control methods are used, then the control circuit is easy to implement, but the control accuracy during phase-conversion is insufficient and jitter occurs
Solution Approach 1:
The patent applies preliminary compensation by pre-adjusting the compensation signal based on the detected number of active power conversion circuits before phase-conversion completes. This anticipatory adjustment prevents output current jitter and improves control accuracy during transitions, achieving high precision without requiring complex real-time correction mechanisms.
Data Source
AI summary
The present disclosure discloses a control circuit and a control method for a multiphase power supply and the multiphase power supply. The control circuit includes a current reference signal generator and a controller. The current reference signal generator is configured to adjust a first compensation signal according to a first scaling factor and a first voltage signal, so that the first compensation signal follows the first voltage signal in a steady state, and a current reference signal is obtained according to the first compensation signal and the first voltage signal. The controller is configured to obtain a control signal for each phase power conversion circuit according to the current reference signal to control each phase power conversion circuit to provide a power output to a load. The present disclosure can improve a phase-conversion stability of the multiphase power supply, and can achieve fast and accurate control of the multiphase power supply.