Motor Rotation Interlocking Device Preventing Loop Collisions
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Solution Overview
Problem
Existing motor rotation control circuits lack an interlocking function, leading to unintended motor stoppages and increased production costs due to accidental switch activation and the need for redesigning circuits, which affects production efficiency and reliability.
Innovation Solution
An interlocking device comprising a power-supply terminal, earth terminal, clockwise and counterclockwise rotation modules with relays and trigger switches, and diodes, which prevent simultaneous activation of opposing rotation loops, ensuring synchronized operation and energy waste prevention through delayed power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clockwise rotation switch and counterclockwise rotation switch are synchronously pressed, then the motor will immediately stop, but this causes production interruption and affects production efficiency
Solution Approach 1:
The patent applies preliminary anti-action by pre-configuring interlocking connections between the clockwise and counterclockwise rotation circuits. When one rotation direction is activated, the circuit automatically prevents the opposite direction from being activated, thereby preventing the harmful effect of motor stoppage before it can occur.
2Ease of operation
If the clockwise rotation switch or counterclockwise rotation switch is pressed accidentally, then unintended rotation occurs, but this increases the risk of loop collision and short circuit
Solution Approach 1:
The patent implements preliminary anti-action by establishing interlocking relationships between the two rotation circuits before any accidental activation can occur. The circuit design ensures that when one rotation direction is active, the other direction is electrically blocked, preventing unintended rotation and potential short circuits while maintaining ease of normal operation.
3Reliability
If the motor needs to add the interlocking function, then it is necessary to additionally increase the manpower cost to redesign the circuit and waste time to test the reliability, thus increasing the cost and reducing the competitive power
Solution Approach 1:
The patent applies segmentation by dividing the rotation control system into independent clockwise and counterclockwise modules, each with its own relay and switch. The interlocking function is achieved through standardized interconnections between these segmented modules, allowing the system to be designed, tested, and maintained as separate units, thereby reducing overall complexity.
Solution Approach 2:
The patent implements universality by designing the interlocking mechanism to serve multiple functions simultaneously: it prevents simultaneous activation of opposite rotations, provides automatic protection against accidental switch presses, and enables independent control of each rotation direction. This multi-functional design eliminates the need for separate protection circuits.
Data Source
AI summary
An interlocking device for controlling clockwise and counterclockwise rotation of a motor is connected with a clockwise rotation module and a counterclockwise rotation module at both ends thereof to form a loop by cooperating with a power-supply terminal and an earth terminal. The clockwise rotation module includes a clockwise rotation trigger switch and a clockwise rotation relay. The counterclockwise rotation module includes a counterclockwise rotation trigger switch and a counterclockwise rotation relay. By such arrangements, the loop collision caused by mis-touch can be avoided by a cross connection of the clockwise and counterclockwise rotation relays with the clockwise and counterclockwise rotation trigger switches, thus preventing the man-made careless mistake and maintaining the smoothness of the operation.