Integrated Reversing Contactor for Compact Motor Direction Control
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Solution Overview
Problem
Conventional forward and reverse rotation control devices for motors are bulky, occupy significant mounting space, and have complex wiring due to the need for interlocking modules to prevent simultaneous conduction of input and output members.
Innovation Solution
A forward and reverse rotation control device with a moving assembly that switches between two connecting positions, changing the phase sequence of motor windings by altering the connections between input and output members, thus controlling motor rotation without the need for interlocking modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two contactors with an interlocking module are used to control forward and reverse rotation, then the motor rotation direction can be controlled, but the device becomes bulky and occupies significant mounting space
Solution Approach 1:
The patent combines the functions of two separate contactors into a single contactor by integrating the interlocking mechanism directly into the contactor structure. The moving assembly includes moving contacts that can simultaneously establish forward and reverse connections while maintaining interlocking functionality, eliminating the need for a separate interlocking module and reducing overall device size.
Solution Approach 2:
The single contactor is designed to perform multiple functions: it can connect power supply lines to output members in forward rotation mode, switch to reverse rotation mode by changing contact positions, and inherently provide interlocking protection. This multi-functional design replaces the need for separate dedicated components for each function.
2Reliability
If an interlocking module is mounted between two contactors to prevent simultaneous conduction, then safety is improved, but the wiring becomes complex
Solution Approach 1:
The interlocking function is merged into the contactor's moving assembly structure. The moving contacts are designed such that when one contact establishes a connection, the mechanical structure prevents the other contact from simultaneously establishing its connection, inherently providing interlocking protection without separate wiring.
Solution Approach 2:
The contactor's own mechanical structure provides the interlocking function. The moving assembly's design ensures that the contacts cannot simultaneously conduct in both forward and reverse directions through its inherent mechanical configuration, making the system self-regulating without external interlocking wiring.
3Adaptability or versatility
If two contactors are used for forward and reverse rotation control, then the motor can rotate in both directions, but the structure becomes bulky
Solution Approach 1:
The patent merges the functionality of two separate contactors into a single integrated contactor. The moving assembly contains all necessary contacts and moving components to achieve both forward and reverse rotation control within one device housing, significantly reducing the volume occupied by the control device.
Solution Approach 2:
A single contactor is designed to universally handle both forward and reverse rotation control functions. The moving contacts can be positioned to establish different connection configurations, enabling the same component to perform multiple rotation control functions that previously required separate dedicated contactors.
Data Source
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AI summary
Embodiments of the present disclosure provide a forward and reverse rotation control device for power-using equipment. The forward and reverse rotation control device comprises: a first input member adapted to be electrically connected to a first power supply line; a second input member adapted to be electrically connected to a second power supply line; a first output member and a second output member adapted to be connected to an input end of the power-using equipment; and a moving assembly capable of switching between a first connecting position and a second connecting position, wherein in a case that the moving assembly is in the first connecting position, the moving assembly connects the first input member to the first output member and connects the second input member to the second output member, and in a case that the moving assembly is in the second connecting position, the moving assembly connects the first input member to the second output member and connects the second input member to the first output member.