Single-Twisted-Pair DC Power Supply for Adaptive Multi-Device Bus Power
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Solution Overview
Problem
Existing DC-power supply systems lack flexibility in configuring networks with multiple DC-powered devices connected in parallel, as they cannot efficiently adjust operational DC power delivery based on individual device requirements, limiting dynamic operation and hot plugging/unplugging capabilities.
Innovation Solution
A DC-power supply device and DC-powered device configuration that utilize a single twisted-pair wired bus for both power and data exchange, allowing the DC-power supply device to determine and deliver operational DC power based on received requirement information from connected devices, and enabling devices to operate in their respective regular modes with adaptable voltage and current levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DC-powered devices are connected in parallel via a single wired bus, then installation complexity is reduced and network flexibility is improved, but the system cannot efficiently adjust operational DC power delivery based on individual device requirements
Solution Approach 1:
The system implements feedback through communication between DC-powered devices and the DC-power supply device. Devices transmit their DC-voltage requirement and DC-current requirement information via the wired bus, and the power supply device uses this feedback to determine and adjust the operational DC output power amount, resolving the contradiction between network flexibility and power delivery adjustment capability.
Solution Approach 2:
Each DC-powered device autonomously determines its own power requirements and communicates them to the power supply device. The devices self-configure by transmitting their initialization DC input power amount requirements, enabling the system to automatically adapt to individual device needs without complex manual configuration, thus maintaining both flexibility and operational efficiency.
2Reliability
If the system delivers high operational DC power to support all devices in regular operation mode, then all devices can operate simultaneously, but devices requiring only low power during initialization are over-supplied
Solution Approach 1:
The system dynamically adjusts the operational DC output power amount based on real-time device requirements. During initialization, only the initialization DC input power amount is delivered to individual devices. When devices transition to regular operation mode, the power supply device recalculates and delivers the appropriate operational DC power amount, ensuring reliable operation while avoiding energy waste from over-supply.
Solution Approach 2:
The system changes power delivery parameters dynamically. The DC-power supply device determines the operational DC output power amount by considering the DC-voltage requirement and DC-current requirement information received from devices. This parameter adjustment enables the system to match power delivery precisely to actual device needs, preventing energy loss while ensuring operational reliability.
3Device complexity
If the DC-power supply device provides fixed DC output power amounts, then the system is simpler to control, but it cannot adapt to different numbers and requirements of connected DC-powered devices
Solution Approach 1:
The system performs preliminary action by having DC-powered devices transmit their DC-voltage requirement and DC-current requirement information before full power delivery begins. During initialization mode, devices communicate their power needs in advance, allowing the DC-power supply device to determine the appropriate operational DC output power amount before committing to sustained power delivery, thus achieving adaptability without excessive control complexity.
Solution Approach 2:
The wired bus serves multiple functions: it provides DC power delivery and simultaneously carries communication signals for transmitting power requirement information. This multi-functionality reduces overall system complexity while enabling the DC-power supply device to adapt to different configurations of connected devices, as the same physical medium handles both power and configuration tasks.
4Adaptability or versatility
If devices can be dynamically added or removed from the network, then hot plugging capability is improved, but maintaining operational stability becomes more difficult
Solution Approach 1:
The system maintains stability during hot plugging through continuous feedback. When devices are dynamically added or removed, they transmit their DC-power requirement information via the wired bus, and the DC-power supply device receives this feedback to recalculate and adjust the operational DC output power amount. This feedback mechanism ensures operational stability is maintained even as network composition changes.
Solution Approach 2:
The system is designed to be dynamic in response to network changes. The DC-power supply device continuously monitors and determines the operational DC output power amount based on current device requirements. This dynamic adjustment capability allows the system to accommodate hot plugging of devices while maintaining operational stability, as the power delivery automatically adapts to the current network state.
Data Source
AI summary
The invention relates to a DC-power supply device (400) for supplying operational DC-power to one or more DC-powered devices that have respective DC-power requirements, that comprises a power interface (402) for providing, via a single twisted-pair wired bus (401), DC output power, a DC-power-supply network communication unit (404) configured to receive DC-power requirement information indicative of a DC-voltage requirement and a DC-current requirement for operation of the respective connected DC-powered devices, and a DC-power-supply control unit (406) configured to drive, in an initialization supply mode, delivery of initialization DC-output power amount, that is suitable for transmission by the DC-powered devices of respective DC-power requirement information, to determine, using the DC-power requirement information and a power-determination rule, and provide an operational DC output power for powering operation of at least one the DC-powered devices in its regular operation mode, thus enabling a powering of multiple DC-powered devices having different DC-power requirements.