Electromagnetic Translator Auto-Braking Under Control Loss
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Solution Overview
Problem
Systems like free piston machines without mechanical constraints rely heavily on real-time control, and the loss of control can lead to catastrophic behavior, especially in multiphase electromagnetic machines where synchronization between piston assemblies is crucial.
Innovation Solution
A linear generator system that includes a linear multiphase electromagnetic machine with a translator and a stator, coupled with power electronics and control circuitry. The control circuitry detects fault events and uses electromagnetic techniques to brake the translator, determining the appropriate technique based on the fault type and availability of operating parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time control is used in free piston machines, then system operation and synchronization are maintained, but loss of control leads to catastrophic behavior
Solution Approach 1:
The patent applies preliminary anti-action by implementing an auto-braking mechanism that automatically activates when control is lost or faults occur. The braking force is pre-configured to oppose and counteract the translator's motion, preventing catastrophic behavior before it can occur. The control circuitry detects control loss conditions and immediately applies electromagnetic braking to shrink the translator's trajectory and bring it to a safe stop.
Solution Approach 2:
The patent converts the harmful effect of uncontrolled translator motion into a beneficial outcome by using the electromagnetic machine's own structure to generate braking force. When control is lost, the system utilizes the stator and translator interaction to create a shrinking trajectory effect, transforming the potential disaster of runaway motion into a controlled, predictable shutdown.
2Adaptability or versatility
If mechanical constraints are removed to enable free piston operation, then system flexibility and adaptability improve, but control complexity and safety requirements increase
Solution Approach 1:
The patent replaces mechanical constraint systems with electromagnetic control and auto-braking mechanisms. Instead of using physical stops, guides, or mechanical linkages to control translator motion, the system uses electromagnetic forces generated by the stator windings and control circuitry. This substitution maintains the flexibility of free piston operation while providing precise control and automatic safety braking without complex mechanical components.
3Manufacturing precision
If extensive real-time control is implemented, then translator motion is precisely managed, but fault management becomes more critical and complex
Solution Approach 1:
The patent extracts the fault management function from the overall control system by implementing a dedicated auto-braking mechanism that operates independently upon detection of control loss or faults. The control circuitry monitors for fault conditions and automatically triggers the braking sequence, separating the safety function from the primary motion control. This extraction simplifies fault management by creating a specialized, autonomous safety subsystem.
4Stability of the object's composition
If synchronization is maintained in multiphase systems, then system coordination improves, but loss of synchronization leads to unpredictable behavior
Solution Approach 1:
The patent converts the unpredictable behavior resulting from synchronization loss into a predictable, controlled shutdown. When phase synchronization is lost or faults occur, the auto-braking mechanism activates to create a shrinking trajectory, transforming the potential for chaotic, unpredictable translator motion into a controlled, predictable deceleration and stop sequence.
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 system effectively manages fault events by automatically braking the translator, ensuring safe and predictable shutdown or reduction in motion, even in the absence of position information, thus preventing catastrophic failures.
Implementation Method 1
The control circuitry is configured to, in response to detecting the fault event, cause a current to be applied to a phase of the multiphase electromagnetic machine to cause a force acting on the translator that opposes an axial motion of the translator
Data Source
AI summary
Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event. A polarity indicative of an electromotive force in determined in at least one phase of the linear multiphase electromagnetic machine caused by a motion of the translator. In response to detecting the fault event, the system causes, based on the polarity, a current to be applied to a respective phase of the at least one phase to cause a force acting on the translator that opposes an axial motion of the translator to cause the translator to brake. Braking includes causing the translator to reciprocate at a reduced velocity by opposing axial motion over one or more cycles. The system may use one or more of position information, current information, operating parameters, to brake, or may brake the translator independent of such information.