Solenoid Drive Circuit Delay Eliminates Contact Bounce
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Solution Overview
Problem
Conventional remote control switches experience mechanical contact bounce and chatter, leading to inconsistent energy delivery and reduced operational lifetime due to intermittent power during solenoid activation, which existing solutions like solid-state switches also fail to fully address.
Innovation Solution
A solenoid drive circuit with a predetermined delay is introduced, energizing the solenoid after the primary switch contact has transitioned to a stable position, utilizing components like diodes, capacitors, and threshold devices to ensure a controlled and complete mechanical transition, reducing contact bounce and arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the solenoid is energized immediately when the primary switch contact transitions, then the response time is reduced, but contact bounce and chatter occur leading to inconsistent energy delivery
Solution Approach 1:
The circuit performs preliminary detection of the primary switch contact transition state before energizing the solenoid. The control circuit monitors the contact position and waits for a stable transition state, ensuring the solenoid is only energized when the contact has fully settled in its new position, thereby avoiding contact bounce and chatter.
Solution Approach 2:
A control circuit is introduced as an intermediary between the primary switch contact and the solenoid. This control circuit processes the contact transition signal, filters out bounce and chatter, and generates a clean energization signal for the solenoid, ensuring consistent energy delivery while maintaining fast response.
2Productivity
If the solenoid is energized immediately when the primary switch contact transitions, then the operational speed is improved, but contact arcing and wear increase reducing operational lifetime
Solution Approach 1:
The control circuit performs preliminary verification of contact stability before solenoid energization. By detecting whether the contact transition has completed and stabilized, the system avoids energizing during bounce periods, thereby preventing contact arcing and extending the operational lifetime of the switch contacts.
Solution Approach 2:
The control circuit continuously monitors the primary switch contact position and uses this feedback to determine the appropriate timing for solenoid energization. The feedback mechanism ensures that energization only occurs when the contact has fully transitioned and stabilized, minimizing arcing and wear while maintaining high operational speed.
3Reliability
If a delay circuit is added to eliminate contact bounce, then the energy delivery consistency is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical delay mechanisms with an electronic control circuit that uses signal processing to detect contact transition stability. This electronic approach achieves the same bounce elimination function with simpler, more reliable components, maintaining energy delivery consistency without excessive circuit complexity.
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 solenoid drive circuit consistently provides sufficient energy for contact closure, reduces contact bounce and arcing, and enhances the reliability of remote control switch operations by ensuring complete mechanical transitions.
Implementation Method 1
A solenoid drive circuit with a predetermined delay is introduced, energizing the solenoid after the primary switch contact has transitioned to a stable position
Implementation Method 2
utilizing components like diodes, capacitors, and threshold devices to ensure a controlled and complete mechanical transition
Data Source
AI summary
A method and system for proving a solenoid drive circuit. An exemplary solenoid drive circuit comprises a solenoid drive circuit input coupled to a primary switch. The primary switch comprises a first set of contacts residing in a first stable position. A remote control switch is coupled to an output of the primary switch and the remote control switch comprises a solenoid drive circuit having a predetermined delay. The predetermined delay energizes a solenoid after the primary switch contact transitions from a first stable position to a second stable position.