Electromagnetic Valve Actuation via Voltage Clocking
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Solution Overview
Problem
Existing methods for actuating electromagnetic loads, such as magnetic valves, require adaptation to specific voltage and load parameters, limiting their universality and increasing costs, as the switching process must occur during current ramp-up to avoid saturation and ensure accurate timing determination.
Innovation Solution
The method involves clocking the voltage upon application to ensure the switching process occurs within the current ramp-up, independent of the applied voltage or load parameters, using a switching means and measurement resistor to control current and evaluate the current profile for precise switching and holding control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage is applied to electromagnetic load without clocking during current ramp-up, then switching process occurs outside current ramp-up phase, but magnetic circuit saturation occurs and switching point in time cannot be determined accurately
Solution Approach 1:
The voltage is clocked periodically during the current ramp-up phase through a switching means. This periodic application and interruption of voltage ensures the current remains in the ramp-up phase where the magnetic circuit does not saturate, enabling accurate detection of the switching point in time through current profile evaluation.
Solution Approach 2:
The current flowing through the electromagnetic load is continuously evaluated to detect changes in the current profile that indicate the switching process. This feedback mechanism allows the system to determine the switching point in time accurately and adjust the voltage clocking accordingly to maintain operation within the current ramp-up phase.
2Measurement precision
If method is adapted to specific voltage and load parameters to ensure switching during current ramp-up, then switching timing accuracy is improved, but universality of the method is reduced and costs increase
Solution Approach 1:
The circuit is designed with a universal voltage clocking mechanism that can be applied to electromagnetic loads operating at different voltages (e.g., 12V and 24V automotive electrical systems). The switching means and control method are not tied to specific voltage parameters, allowing the same circuit design to be used across different voltage systems while maintaining accurate switching timing determination.
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
This approach allows for standardized processes across different electromagnetic loads and voltage systems, preventing magnetic circuit saturation and enabling accurate switching state determination, reducing costs and ensuring reliable operation.
Implementation Method 1
A voltage is applied to an electromagnetic load in the methods and devices described there. The current flowing through the load increases on account of the applied voltage.
Implementation Method 2
When switching between states, magnetic parts or parts connected to them, as, for example, an armature or a valve needle, move on account of the current flowing through said load from on position to another.
Data Source
AI summary
A method is proposed for actuating an electromagnetic load (3) which can be switched between at least two switching states, particularly a magnetic valve, wherein switching between a first and a second of the switching states takes place as a result of a current flowing through the load (3) by means of applying an electrical voltage to said load (3). Provision is thereby made for the voltage to be clocked upon application thereof to said load (3) if due to the applied voltage the switching process would occur without clocking outside of a current ramp-up. The invention furthermore relates to an electrical circuit for actuating an electromagnetic load (3).