Latching Device Power Loss Control
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Solution Overview
Problem
Conventional latching devices in electrical assemblies lack the ability to control the position of the latching member after a power supply loss, leading to uncontrolled states upon power-on, which can degrade performance or cause damage, and require constant power, resulting in higher operating temperatures.
Innovation Solution
An electrical assembly with a latching device that includes an actuator, an operating state detection unit, and a controller to selectively move the latching member to a desired position upon detection of abnormal states, such as power loss, allowing for controlled states upon power restoration and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional latching device is used, then the latching member remains in its last position after power loss, but the device has an uncontrolled state upon power-on which can degrade performance or cause damage
Solution Approach 1:
The controller is configured to automatically move the latching member to a predetermined safe position upon detecting power restoration, before normal operation resumes. This preliminary action ensures the device starts in a known safe state, preventing potential damage or performance degradation that would occur with an uncontrolled state.
2Temperature
If a conventional non-latching device is used to avoid uncontrolled states, then the device has a fixed state upon power-on, but it requires constant power supply resulting in higher operating temperature
Solution Approach 1:
The latching device uses periodic or pulse-based power supply to the actuator rather than constant power. The actuator is energized only when needed to change the latching member position, and then de-energized while maintaining the position through the latching mechanism. This periodic action significantly reduces power consumption and operating temperature compared to constant power requirements of non-latching devices.
3Reliability
If the latching device lacks power supply detection and controller, then the structure is simpler, but the position of the latching member cannot be controlled after power loss
Solution Approach 1:
The power supply detection unit continuously monitors the power supply status and provides feedback to the controller. When power loss or restoration is detected, the controller receives this feedback and automatically executes the appropriate control sequence to move the latching member to the predetermined safe position, ensuring reliable position control after power loss.
Solution Approach 2:
The controller acts as an intermediary between the power supply detection unit and the actuator. It receives detection signals from the power supply detection unit, processes the information, and generates appropriate control signals to drive the actuator. This intermediary function enables automatic position control without requiring direct complex interconnection between detection and actuation components.
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
Enables controlled states of the latching device after power loss, preventing damage and improving performance by reducing power consumption and operating temperatures, and allowing for multiple controlled states, thus replacing conventional non-latching devices while avoiding uncontrolled power-on states.
Implementation Method 1
the operating state detection unit is configured to detect an abnormal operating state of the latching device
Implementation Method 2
an actuator configured to selectively move the latching member between the first and second positions
Data Source
AI summary
There is provided an electrical assembly comprising of a latching device including a latching member configured to be positionable in a first position and a second position, the latching device further including an actuator configured to selectively move the latching member between the first and second positions and an operating state detection unit configured to detect an abnormal operating state of the latching device; and a controller configured to selectively drive the actuator to move the latching member to a selected one of the first and second positions in response to the detection of the abnormal operating state.