Adaptive Pin Diode Drive Circuit Voltage Matching
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Solution Overview
Problem
Current PIN diode drive circuits in MRI systems experience significant power loss due to mismatched supply and load voltages, leading to increased cooling requirements and mechanical constraints.
Innovation Solution
An adaptive method and device that select the supply voltage based on the load voltage of connected local coils, minimizing power loss by using an assignment table or real-time calculation to adjust the supply voltage dynamically, ensuring only the minimum required voltage is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed high supply voltage is applied to PIN diode drive circuits, then the circuit can handle maximum load conditions, but power loss increases significantly when load voltage is lower
Solution Approach 1:
The patent implements dynamic supply voltage adjustment by switching between multiple voltage sources (e.g., 5V, 3.3V, 1.8V) based on real-time load voltage detection. The control unit continuously monitors the load voltage and dynamically selects the appropriate supply voltage level, transforming the static voltage supply into a dynamic adaptive system that matches supply to actual load requirements, thereby minimizing power loss while maintaining operational flexibility.
Solution Approach 2:
The patent changes the supply voltage parameter adaptively based on load conditions. By detecting the load voltage and selecting from multiple predefined voltage levels, the system adjusts the supply voltage parameter to closely match the load requirements. This parameter adaptation resolves the contradiction by ensuring the supply voltage is neither excessively high (causing power loss) nor insufficient (limiting adaptability).
2Reliability
If higher supply voltage is used to ensure adequate power delivery, then load conditions are satisfied, but cooling requirements and mechanical constraints increase
Solution Approach 1:
The system dynamically adjusts supply voltage based on actual load requirements rather than using a fixed high voltage. The control unit monitors load voltage and switches between multiple voltage sources accordingly, ensuring adequate power delivery only when necessary. This dynamic approach reduces continuous high-power dissipation, thereby lowering cooling requirements and associated mechanical complexity.
Solution Approach 2:
Instead of continuously applying excessive high voltage, the system applies only the partial voltage necessary to meet current load conditions. By selecting from multiple voltage levels and applying only the minimum required voltage, the system avoids excessive power dissipation and the resulting cooling requirements, while still ensuring adequate power delivery when needed.
3Loss of energy
If multiple voltage sources are available for selection, then power loss is minimized through adaptive matching, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously monitors the load voltage and uses this information to select the appropriate supply voltage level. This closed-loop feedback system automatically adjusts the supply voltage to match load requirements, minimizing power loss while managing complexity through automated control rather than manual intervention or complex switching mechanisms.
Solution Approach 2:
The system performs self-service by automatically detecting load voltage conditions and selecting the appropriate supply voltage without external intervention. The control unit autonomously manages the voltage selection process based on real-time monitoring, reducing the need for complex external control mechanisms and simplifying the overall system architecture while maintaining adaptive power delivery.
Data Source
AI summary
The embodiments relate to a method and to a device having at least one source, (in particular, having a source for a magnetic resonance imaging system), wherein the device is designed to select a supply voltage of the source on the basis of a load voltage of a load supplied with current and/or voltage from the source.