Frequency Inverter Adapter for Motor Housing Tolerance Compensation
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Solution Overview
Problem
Existing frequency converter systems for electric motors lack flexibility when needing to be adapted for use with different motor housings, as they are often specifically designed for a particular motor and do not easily accommodate variations in motor housing configurations.
Innovation Solution
A detachable adapter with a plate-shaped adapter base and a floating circuit carrier allows for secure electrical connections between the frequency converter and motor lines, enabling the frequency converter to be mounted on various motor housings by compensating for tolerance differences through adjustable positioning and sealing, and featuring screw terminal strips and plug strips for efficient connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frequency converter is specifically designed for a particular motor housing, then the structural integration and electromagnetic interference protection are improved, but the adaptability to different motor housings deteriorates
Solution Approach 1:
The frequency converter system is segmented into a converter housing unit and a separate adapter unit. The adapter acts as an intermediary component that can be attached to different motor housings, while the converter housing remains a standardized unit. This segmentation allows the converter to maintain its integrated structure while adapting to various motor configurations through different adapters.
Solution Approach 2:
An adapter is introduced as an intermediary component between the motor housing and the converter housing. The adapter includes a circuit carrier with electrical connection elements that interface with both the motor connection lines and the frequency converter. This mediator enables the standardized converter housing to connect to different motor housings without requiring custom integration for each motor type.
2Manufacturing precision
If the circuit carrier is rigidly fixed to the adapter base, then the manufacturing precision and electrical connection reliability are improved, but the tolerance compensation between different components deteriorates
Solution Approach 1:
The circuit carrier is designed with a floating mounting arrangement on the adapter base, allowing it to move dynamically within certain limits. This dynamic positioning enables the circuit carrier to automatically adjust to tolerance variations in the adapter base and converter housing, ensuring reliable electrical connections without requiring extremely tight manufacturing tolerances across all components.
Solution Approach 2:
The mounting parameters of the circuit carrier are designed to allow positional variation within a defined range. The floating mounting mechanism changes the positional parameters of the circuit carrier relative to the adapter base, enabling tolerance compensation while maintaining proper electrical connections. This approach trades fixed precision for flexible adaptation.
Data Source
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AI summary
The invention relates to a frequency converter for controlling an electric motor with a converter housing designed for mounting on the motor housing, wherein the frequency converter is connected on the input side to at least one mains connection cable leading into the converter housing for connection to the mains supply, and is detachably connectable to the electric motor on the output side via connectors, characterized in that the converter housing is fixed to the motor housing by means of an adapter comprising electrical connection elements which are mechanically connected on one side to the motor housing and on the other side to the converter housing.