Solenoid Device Pulse Interval Control for Impact Noise Reduction
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Solution Overview
Problem
Existing solenoid devices face challenges in reducing impact noise, particularly when the operation environment changes or mechanical loads vary, leading to increased complexity and costs due to the need for electric circuit control elements.
Innovation Solution
A solenoid device with a driving control unit that supplies current pulses to the solenoid and adjusts the pulse interval, eliminating the need for additional control elements and allowing for noise reduction across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If current pulses are supplied to the solenoid with fixed timing, then the solenoid device operates simply, but impact noise increases when the plunger is repelled back to the maximum extension position
Solution Approach 1:
The patent applies periodic action by supplying current pulses to the solenoid at specific intervals during the plunger's movement. The driving control unit supplies current pulses periodically when the plunger is moving toward the maximum extension position, creating a rhythmic driving pattern that reduces impact noise while maintaining simple circuit implementation without requiring complex control elements.
Solution Approach 2:
The patent changes the timing parameter of current supply by introducing pulse intervals between current pulses. Instead of continuous or fixed-timing current supply, the driving control unit adjusts the timing parameters by supplying current in pulsed manner with specific intervals, thereby reducing impact noise while keeping the circuit structure simple.
2Object-affected harmful factors
If the plunger displacement speed is reduced by shortening current supply time, then impact noise is reduced, but the solenoid's attraction force becomes insufficient when temperature increases or mechanical load varies
Solution Approach 1:
The patent uses periodic current pulse supply to maintain reliable attraction force across varying conditions. By supplying current in periodic pulses rather than continuously or with fixed timing, the solenoid receives sufficient energy to maintain attraction force even when temperature increases or mechanical load varies, while the pulsed nature reduces impact noise during plunger repulsion.
Solution Approach 2:
The patent implements feedback by the driving control unit monitoring and adjusting current pulse timing based on plunger position and operational conditions. The control unit supplies current pulses at optimized intervals that adapt to temperature changes and mechanical load variations, ensuring reliable attraction force while maintaining noise reduction benefits.
3Object-affected harmful factors
If multiple current pulses are supplied to reduce impact noise, then noise is reduced, but the control circuit becomes more complex requiring additional control elements
Solution Approach 1:
The patent achieves multiple pulse supply with simple control by using periodic action. The driving control unit supplies current in periodic pulses with predetermined intervals, eliminating the need for complex control circuits while still reducing impact noise through the multi-pulse approach. The periodic nature simplifies the control logic to basic timing circuits.
Solution Approach 2:
The patent applies self-service by designing the current pulse supply system to automatically operate with fixed periodic intervals. The driving control unit self-regulates the pulse timing without requiring complex external control elements, allowing the system to reduce impact noise through multiple pulses while maintaining simple circuit architecture.
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 solution effectively reduces impact noise without additional control elements, maintaining a simple structure and low costs, while adapting to changes in the operation environment and mechanical loads.
Implementation Method 1
a solenoid configured to cause a displacement of the plunger
Implementation Method 2
a plunger biased toward a maximum extension position by a coil spring
Data Source
AI summary
A solenoid device including a plunger, a solenoid configured to cause a displacement of the plunger, and a driving control unit configured to control driving of the solenoid. The driving control unit supplies current pulses to the solenoid and changes a pulse interval of the current pulses.