Multi-Phase Power Supply Dead Beat Control
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Solution Overview
Problem
Existing power supply devices face challenges in achieving rapid and accurate two-level pulse power control across a wideband frequency range due to secondary oscillations and complexity in detecting feedback signals, particularly in multi-phase interleaving systems, which hinder efficient RF power supply for applications like semiconductor and flat-panel manufacturing.
Innovation Solution
The implementation of dead beat control in a power supply device with an LC chopper circuit, utilizing combined phase current values for constant current control, allows for rapid detection and response by using initial output voltage values and capacitance current feedback, reducing the need for multiple detectors and simplifying control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant voltage control based on output voltage feedback is used in multi-phase interleaving system, then voltage regulation is achieved, but secondary oscillating voltage occurs causing overshoot or undershoot and requiring low-speed control response
Solution Approach 1:
The patent implements feedback control by detecting phase current values from each phase and using them to control the switching elements. The detected phase current values are fed back to the control unit which adjusts the switching timing to maintain stable output voltage without secondary oscillations. This current-based feedback mechanism eliminates the overshoot and undershoot problems associated with voltage-based feedback while enabling rapid response.
Solution Approach 2:
The patent employs periodic switching control where switching elements in each phase are turned on and off at predetermined intervals. The control unit periodically detects phase current values and adjusts switching timing in a cyclic manner, creating a periodic control action that maintains stable voltage regulation while preventing secondary oscillations through synchronized multi-phase operation.
2Measurement precision
If multiple detectors are used to detect respective phase current values for current control, then control precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the detection function by using a single detector that sequentially detects phase current values from multiple phases. The control unit processes these detected values to control switching elements in all phases. This combining approach maintains precise current control while reducing the number of detectors from multiple (one per phase) to a single shared detector, thereby simplifying the device structure.
Solution Approach 2:
The detector in the patent serves a universal function by detecting phase current values from all phases sequentially. This single detector performs the measurement task for multiple phases, making it a multi-functional component. The control unit then uses these universally detected current values to control all switching elements, eliminating the need for dedicated detectors for each phase and reducing overall system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach accelerates multi-phase interleaving control, prevents overshooting and undershooting, and enables efficient wideband pulse power control with improved response speed and reduced complexity, enhancing the performance of power supply devices in demanding applications.
Implementation Method 1
an LC chopper circuit (2) configured to receive an input voltage (Vin) and to provide an output voltage (vo)
Implementation Method 2
an LC chopper circuit (2) configured to receive an input voltage (Vin) and to provide an output voltage (vo)
Data Source
AI summary
Multi-phase interleaving control of a power supply device is accelerated. Furthermore, in accelerating the multi-phase interleaving control in the power supply device, detection of feedback signal is accelerated. In the power supply device and a method for controlling the power supply device, output voltage is acquired as an operation result of a discrete time process using an initial value of the output voltage at a predetermined point, and a detection value of capacitance current at each point of the discrete time process. Accordingly, only detection of the initial value is performed when the output voltage being slow in response is acquired, and detection performed in the discrete time process can be accomplished by detection of capacitance current being rapid in response, thus enabling rapid response.