Power Management Module Voltage Drop Negotiation
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Solution Overview
Problem
Existing power management modules in digital video surveillance systems face challenges in preventing damage to devices due to voltage drops, which can cause high currents when supplying power, especially when the voltage applied is too low or too high, leading to potential damage to the apparatus.
Innovation Solution
A power management module that estimates and negotiates the power supply to an apparatus, taking into account voltage drops and resistance values, to ensure safe and efficient power allocation, and includes features for re-negotiating power allocation based on measured voltage drops to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If power is supplied to the apparatus without negotiation, then power delivery speed is improved, but device safety deteriorates due to potential voltage drops causing excessive current
Solution Approach 1:
The power management module performs preliminary power negotiation with the apparatus before supplying power. This preliminary action includes determining the power class of the apparatus and calculating the maximum allowable voltage drop, thereby establishing safe power delivery parameters in advance to prevent excessive current while maintaining efficient power supply.
Solution Approach 2:
The system implements feedback mechanisms where the power management module continuously monitors the power supply status and adjusts power delivery based on the apparatus's actual power consumption and voltage drop conditions, ensuring device safety while optimizing power delivery efficiency.
2Power
If voltage is increased to deliver more power, then power delivery capability is improved, but device damage risk worsens due to excessive voltage causing high current
Solution Approach 1:
The power management module dynamically adjusts power delivery parameters including voltage and current limits based on the negotiated power class and calculated voltage drop. By changing these parameters adaptively rather than using fixed high voltage, the system achieves adequate power delivery capability while preventing excessive voltage that could cause device damage.
Solution Approach 2:
The system applies preliminary anti-action by calculating the maximum allowable voltage drop before power delivery and setting protective limits. This preemptive measure counteracts the potential harmful effect of excessive voltage by establishing safety boundaries in advance, allowing high power delivery capability without device damage risk.
3Reliability
If power negotiation is performed before power supply, then device safety is improved, but power delivery time worsens due to additional negotiation steps
Solution Approach 1:
The power negotiation process implements partial action by determining only the essential power class and maximum voltage drop parameters needed for safe power delivery, rather than performing exhaustive negotiations. This streamlined approach maintains device safety while minimizing the time loss associated with negotiation.
4Power
If maximum power is supplied to the apparatus, then power delivery capability is improved, but system reliability worsens due to voltage drops causing excessive current
Solution Approach 1:
The power management module implements dynamic power adjustment based on real-time monitoring of voltage drop and apparatus power consumption. Rather than supplying fixed maximum power, the system dynamically optimizes power delivery to match actual needs while staying within safety limits, thereby maintaining high power capability without compromising system reliability.
Data Source
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AI summary
A power management module (204) for managing power supply from a power sourcing equipment item to an associated apparatus, comprises: - a connexion interface (114) suitable for connecting said power management module (204) to the associated apparatus; - means for estimating a power (304, 305) that said power management module is able to supply via said connexion interface (114); - means for negotiating, based on the power estimated by said means for estimating power (304, 305), the start-up of the associated apparatus in a power class, said means for negotiating comprising means for supplying power (309) via said connexion interface (114); - means for determining an updated power that said power management module (204) is able to supply, when power is supplied to the associated apparatus by said means for supplying power (309); and - means for re-negotiating the start-up of the associated apparatus based on said determined updated power.