Universal Reversing Contactor Module With Integrated Interlock
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Solution Overview
Problem
Existing reversing contactor systems require additional electrical wiring and relays to prevent both contactors from closing simultaneously, leading to increased expense, space requirements, and potential wiring errors.
Innovation Solution
A control module with an interlock control circuit that integrates within a housing, allowing for a single communication connection to manage command signals to control both forward and reverse contactors, eliminating the need for external relays and additional wiring, and includes a telescoping housing to adjust for mounting to varying contactors of different sizes and connectors to engage movable and movable connectors to detect the connector state of the contactors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional relays and wiring are used to prevent both contactors from closing simultaneously, then the reliability of preventing short circuits is improved, but the device complexity and expense increase
Solution Approach 1:
The patent combines the control functions for both forward and reverse contactors into a single control module. The module integrates the interlock logic that prevents simultaneous closure of both contactors, eliminating the need for separate relays and auxiliary wiring. This merging reduces device complexity while maintaining the reliability of preventing short circuits.
Solution Approach 2:
The control module is designed to perform multiple functions: it controls both forward and reverse contactors, implements interlock logic to prevent simultaneous closure, and provides a unified interface for receiving control signals. This multi-functionality eliminates the need for additional dedicated relays and wiring for each contactor.
2Reliability
If additional relays and auxiliary contacts are installed to interlock contactors, then the safety against short circuits is improved, but the space requirements and expense increase
Solution Approach 1:
The patent consolidates the interlock functionality that was previously distributed across multiple relays and auxiliary contacts into a single integrated control module. This consolidation significantly reduces the space required in the control cabinet while maintaining the safety function of preventing simultaneous contactor closure.
3Measurement precision
If multiple separate control connections are provided for forward and reverse contactors, then the control precision is improved, but the ease of operation and assembly deteriorates
Solution Approach 1:
The patent provides a single control module that receives control signals for both forward and reverse contactors through one unified connection interface. This single connection simplifies assembly and operation while the module internally maintains precise control by implementing the interlock logic that ensures only one contactor can be activated at a time.
Data Source
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AI summary
A control module for a reversing contactor includes a housing configured to mount to forward and reverse contactors. The control module is configured to receive command signals for the forward and reverse contactors and provide the command signals to an interlock circuit included within the housing of the control module. The interlock circuit is configured to use the forward and reverse commands as well as feedback signals corresponding to the current status of the contactors to prevent both the forward and reverse contactors from being closed in tandem. The control module is also configured to mount to contactors having different physical sizes. The housing may be configured as a telescoping housing, where one portion of the housing is fixed and a second portion of the housing slides with respect to the fixed portion of the housing to adjust the width of the control module.