Control Concept for a Digitally Controlled Magnetic Supply Device

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This patent describes a new control method and device for digitally regulated magnetic power supply units, especially important for applications like particle accelerators that require high precision. The invention uses a dual-loop control structure: one loop manages magnetic voltage through an adaptive state controller, and the other manages magnetic current using an adaptive PI controller. System components such as the current converter, filter, and load are digitally modeled by an observer, allowing real-time adjustments for improved system stability, accuracy, and robustness, even when direct measurement of system states is difficult or noisy.

Use CasesContent extracted from patent full text and abstract with AI.

• Precision control of magnets in particle accelerators and research facilities.
• High-accuracy magnetic field control for MRI (Magnetic Resonance Imaging) machines.
• Digital power supplies for laboratory or industrial electromagnets requiring stable and rapid response.
• Magnetic field regulation in materials testing or scientific measurement devices with strict signal requirements.
• Advanced magnet control in semiconductor manufacturing tools or beam steering systems.

BenefitsContent extracted from patent full text and abstract with AI.

• Increases precision and speed of magnet power supply control despite hardware limitations.
• Improves robustness and adaptability to varying loads and system conditions via adaptive and observer-based algorithms.
• Allows reliable operation even when internal system states cannot be directly measured or are distorted by noise.
• Reduces negative impacts of component variability and noise via real-time parameter adaptation.
• Enables faster and potentially more energy-efficient control cycles, independent of analog-to-digital converter speed.
• Enhances operational safety by integrating protective limits for power converters.
• Facilitates easier tuning and set-point optimization either during installation or ongoing operation.

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Patent Abstract

The invention relates to a method and to a device for controlling a magnetic supply device, comprising the following steps: a) executing a base structure of the control as a two-loop control having a voltage control loop for the magnetic voltage and a current control loop for the magnetic current, wherein the two control circuits are preferably combined into one controller; b) executing the voltage control loop as a status controller, wherein the return parameters for the status controller are adaptively adjusted as necessary to the behavior of the current converter, output filter and load; c) modeling the behavior of the current converter, output filter and load by means of an observer (observer, Luenberger observer, Kaiman filter) and tracking the observer adapted to the effective behavior of the current converter, output filter and load; and d) implementing the current control loop as an adaptive PI controller.