Semiconductor Device for Latching Solenoid Inflection Point Detection
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Solution Overview
Problem
Latching solenoid-type solenoid valves face challenges in end-point detection when the movable iron core is away from the permanent magnet, leading to inefficiencies and increased power consumption due to the inability to accurately determine the inflection point of the current.
Innovation Solution
A semiconductor device with a control circuit that detects the inflection point of the current flowing through the coil, allowing for precise determination of the movable iron core's position relative to the permanent magnet, thereby reducing power consumption and improving end-point detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the movable iron core is away from the permanent magnet in a latching solenoid-type solenoid valve, then the valve can be opened, but end-point detection cannot be performed leading to increased power consumption
Solution Approach 1:
The patent implements feedback by detecting the inflection point of current change in the coil. When the movable iron core moves away from the permanent magnet, the magnetic flux through the coil changes, causing an inflection point in the current waveform. This feedback signal enables the control system to detect the end-point of the opening operation and stop current supply, thereby reducing power consumption while maintaining operational capability.
2Ease of operation
If conventional end-point detection methods are used when the movable iron core is away from the permanent magnet, then the valve operation can be controlled, but the inflection point of current cannot be detected accurately
Solution Approach 1:
The patent replaces mechanical end-point detection methods with an electrical detection method based on current waveform analysis. By monitoring the inflection point of the current flowing through the coil, the system can accurately detect the position of the movable iron core without relying on mechanical sensors or contact-based detection, thereby achieving precise measurement of the inflection point.
3Stability of the object's composition
If current is continuously supplied to the coil to maintain the valve in the open position, then the valve remains open, but power consumption increases
Solution Approach 1:
The patent employs periodic action by supplying current to the coil only during the opening operation and at specific intervals. When the movable iron core moves away from the permanent magnet, the inflection point detection triggers the control circuit to stop current supply. The valve remains open due to the mechanical position of the iron core, and current is only replenished periodically when needed, thereby maintaining stability while reducing continuous power consumption.
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
The semiconductor device enables efficient end-point detection by identifying the inflection point of the current, reducing unnecessary current flow and power consumption, and maintaining low power dissipation modes when appropriate.
Implementation Method 1
a latching solenoid consisting of a coil 12 and a movable iron core 11 and a permanent magnet 13
Implementation Method 2
the end point detection is easy because the bottom appears due to a rapid change in the solenoid (coil) current
Data Source
AI summary
The semiconductor device controls the first circuit for supplying/stopping the current supplied by a DC power supply to the latching solenoid consisting of a coil and a movable iron core and a permanent magnet, the current is measured based on the input from the current detection circuit. The semiconductor device includes a control circuit having a low power dissipation mode in which the leakage current is reduced, and a normal operation mode. The control circuit maintains the low power consumption mode when no current is flowing through the coil, when a current is flowing through the coil maintains the normal operation mode, further, the movable iron core It comprises a control circuit configured to detect the inflection point of the current detected by the current detection circuit when leaving the permanent magnet.