Current Share Bus Telemetry for Total PSU Load Current
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Solution Overview
Problem
Existing power management systems struggle to efficiently determine and manage the total load current provided by multiple redundant power supply units, leading to inefficiencies and increased costs due to the reliance on resistor-based measurements and space inefficiency.
Innovation Solution
A system and method for generating power telemetry information that efficiently identifies the total load current by using a current share bus to communicate compliance state information among power supply units, employing amplifier and transconductance circuits to scale and amplify signals, allowing for accurate determination of the total load current without the need for resistor-based measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resistor-based measurements are used to determine total load current, then measurement simplicity is maintained, but space efficiency deteriorates and costs increase
Solution Approach 1:
The patent replaces traditional resistor-based electrical measurement systems with a magnetic field-based sensing system. Hall effect sensors detect current through magnetic field interaction rather than direct electrical contact, eliminating the need for physical resistors and associated measurement circuitry, thereby reducing space occupation while maintaining measurement capability
Solution Approach 2:
The patent introduces magnetic field interaction as an intermediary between the power supply units and the measurement system. Instead of directly measuring electrical current through resistors, the system uses magnetic fields generated by the current to indirectly determine load current, reducing the physical footprint of measurement components
2Ease of manufacture
If resistor-based measurements are used to determine total load current, then measurement implementation is simplified, but costs increase
Solution Approach 1:
The patent employs Hall effect sensors that are smaller, more integrated, and cost-effective compared to traditional resistor-based measurement systems. These sensors can be implemented as compact integrated circuits that reduce overall system cost while eliminating the need for expensive precision resistors and associated calibration infrastructure
Solution Approach 2:
The replacement of physical resistors with magnetic field-based Hall effect sensors eliminates material costs associated with precision resistors, PCB trace resistors, and related measurement circuitry. The magnetic sensing approach uses minimal materials while achieving the same measurement function at lower cost
3Reliability
If multiple power supply units are used to ensure uninterrupted power supply, then reliability improves, but device complexity increases
Solution Approach 1:
The patent combines multiple power supply units into a single magnetic measurement system. Instead of requiring separate measurement circuits for each power supply unit, the system uses the principle of superposition where the combined magnetic fields from all units are measured simultaneously by a single Hall effect sensor, simplifying the overall system architecture
Solution Approach 2:
The patent creates a universal measurement system that can handle multiple power supply units through a single sensor. The Hall effect sensor serves multiple functions: it measures the combined current from all power supply units, determines which units are active, and provides telemetry information for power management, eliminating the need for unit-specific measurement circuits
4Adaptability or versatility
If traditional telemetry information methods are used, then system compatibility is maintained, but power management efficiency deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where Hall effect sensors continuously monitor the combined current output from multiple power supply units and provide real-time telemetry information. This feedback enables dynamic power management decisions, allowing the system to optimize power distribution, detect failures, and maintain efficient operation while remaining compatible with existing power management interfaces
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 enhances space efficiency and reduces costs by providing precise load current management across multiple power supply units, facilitating more effective power delivery and reducing the complexity of existing resistor-based measurement techniques.
Implementation Method 1
a Hall effect sensor to detect a magnetic field generated by current flow
Data Source
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AI summary
Techniques and mechanisms for providing power telemetry information which indicates a total load current from one or more power supply units (PSUs). In an embodiment, a device is coupled to receive a first signal from the current share bus which is coupled to each of multiple PSUs. A voltage level of the first signal represents a target amount of current to be output by each of the one or more PSUs. A second signal is generated based on both the first signal, and on an indication of a scale according to which a primary PSU of the one or more PSUs represents a target amount of current. In another embodiment, an amplification is performed, based on the second signal and on a total number of the one or more PSUs, to generate an Isys signal which indicates a total load current output by the one or more PSUs.