Power Control Apparatus with Selective Event Reaction Processing
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Solution Overview
Problem
Conventional surge protection devices (SPDs) lack user control over the aggressiveness of power shutdown responses to voltage transients, leading to unintended interruptions due to low energy switching events.
Innovation Solution
A power control apparatus with a user interface to select between fast and slow reaction modes, evaluating process variable values against event boundaries to determine power events and control switch states, allowing for customizable response to voltage fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If fast reaction mode is used to rapidly respond to power events, then response speed is improved, but unnecessary interruptions increase due to low energy switching transients
Solution Approach 1:
The system dynamically adjusts the reaction mode between fast and slow based on user selection, allowing the evaluation strategy to adapt to different operational requirements. This resolves the contradiction by enabling the system to be fast when needed while filtering out transient noise when stability is prioritized
Solution Approach 2:
The system changes the evaluation parameter approach by individually evaluating each process variable value in fast mode versus evaluating none in slow mode. This parameter change allows the system to respond rapidly to genuine events while ignoring low-energy transients that would cause false triggers
2Reliability
If slow reaction mode is used to filter out transient events, then reliability is improved, but response speed to genuine power events decreases
Solution Approach 1:
The system allows dynamic switching between slow and fast reaction modes based on user needs. When reliability is the priority, slow mode filters out transients; when speed is needed, fast mode responds immediately to genuine events
Solution Approach 2:
The system implements periodic evaluation of process variables against event boundaries, with the evaluation frequency and aggressiveness adjusted based on the selected reaction mode, balancing filtering effectiveness with response speed
3Adaptability or versatility
If user control over reaction aggressiveness is added, then adaptability is improved, but device complexity increases
Solution Approach 1:
The user interface provides a single selection mechanism that controls the entire reaction mode behavior of the power controller. This universal control approach allows users to adapt the system to different needs without adding complex separate control mechanisms for each function
Solution Approach 2:
The system changes its operational parameters (evaluation aggressiveness, response threshold) based on the selected reaction mode. This parameter-based control allows adaptability without requiring complex mechanical or structural modifications to the device
Data Source
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AI summary
A reaction mode is selected through a user interface from a plurality of reaction modes that includes a fast reaction mode, by which each of a plurality of values assigned to a process variable over time are individually evaluated in an event decision that asserts an occurrence of a power event. The reaction modes also include a slow reaction mode by which none of the values assigned to the process variable over time are individually evaluated in the event decision. Measurements of a signal monitored by a power controller are assigned to the process variable as its values. The event decision evaluates the process variable values against an event boundary in accordance with the selected reaction mode. A transition between conducting and non-conducting states in a switch circuit is compelled in response to the occurrence of the power event as determined from the event decision.