Load Activation Control for Power Resumption Current Surges
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Solution Overview
Problem
Conventional electronic apparatuses experience large current surges when power supply is resumed after a stoppage, leading to potential failure of power supply elements due to simultaneous activation of loads.
Innovation Solution
Implement a control method and system that restricts the activation of loads based on a predetermined reference time and activation conditions, using a restriction processing portion to manage load activation upon power resumption, thereby suppressing current flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all loads are allowed to activate simultaneously upon power supply resumption, then the system can quickly resume full operation, but large current surges occur that may cause power supply element failure
Solution Approach 1:
The patent segments the load activation process by dividing loads into multiple groups that activate sequentially rather than simultaneously. The control portion activates loads in a predetermined sequence (first group, then second group, etc.), which segments the current draw over time and prevents overwhelming the power supply portion during resumption.
Solution Approach 2:
The patent applies preliminary action by having the control portion detect power supply resumption and initiate a controlled activation sequence before full operation is needed. The system prepares for load activation by first detecting the power resumption state, then systematically enabling loads in groups rather than allowing immediate simultaneous activation.
2Reliability
If loads are activated sequentially to reduce current surge, then power supply reliability is improved, but the time to resume full operation increases
Solution Approach 1:
The patent applies partial action by activating loads in groups rather than all at once or one at a time. The control portion enables a first group of loads, then a second group, providing a balanced approach that achieves sufficient operational recovery without the extreme delays of sequential individual activation.
Solution Approach 2:
The patent implements periodic action through timed activation sequences where loads are enabled in periodic intervals. The control portion uses timing mechanisms to activate the first group of loads, wait for a predetermined time period, then activate the second group, creating a periodic pattern that manages current draw while maintaining reasonable operational recovery.
3Object-affected harmful factors
If the system monitors power supply status and controls load activation, then current surges are suppressed, but the device complexity increases due to additional control circuits
Solution Approach 1:
The patent applies universality by designing the control portion to perform multiple functions: detecting power supply status, determining which loads to activate, controlling the activation sequence, and timing the intervals. This multi-functional approach consolidates control logic into a single control portion rather than requiring separate dedicated circuits for each function, thereby managing complexity.
Solution Approach 2:
The patent merges the power supply portion and control portion into an integrated system where the control portion directly interfaces with and manages the power supply portion. By combining detection and control functions in a unified control structure that works closely with the power supply portion, the patent reduces the need for additional separate control circuits and minimizes overall system complexity.
Data Source
AI summary
An electronic apparatus includes a power supply portion, a plurality of loads, a drive portion, and a restriction processing portion. The plurality of loads are driven by power output from the power supply portion. The drive portion is provided corresponding to each of the loads and performs a state transition between a drive state in which the load is driven and a non-drive state in which the load is not driven. When stoppage of power supply from the commercial power supply to the power supply portion continues beyond a reference time while a plurality of drive portions are in the drive state, the restriction processing portion can restrict activation of some or all of a plurality of loads whose operations have been stopped by the stoppage of the power supply from the commercial power supply in response to resumption of the power supply from the commercial power supply.