Frequency Converter Cabinet Layout for Easier Cable Connection
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Solution Overview
Problem
Existing frequency converters face difficulties in electrical connection due to limited space and the heavy weight of the power electronics part, making it challenging to remove and reconnect during installation, which complicates maintenance and cable connections.
Innovation Solution
A two-piece power electronics design where the base part with wheels can be easily pulled out of the installation cabinet for maintenance and cable connections, reducing the force required to move the base part by using oblique surfaces, conical guide pegs, or eccentric shafts on the wheels, allowing the power stage part to remain in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power electronics part is left in place in the electrical installation cabinet, then the cabinet structure remains intact, but electrical connections become difficult to make due to lack of space
Solution Approach 1:
The power electronics part is divided into two separate parts: a base part that remains in the cabinet and a power stage part that can be removed. This segmentation allows electrical connections to be made to the base part while the power stage part is removed, creating sufficient space for cable routing and connection work without requiring removal of the entire heavy assembly.
2Area of stationary object
If the power electronics part is removed from the cabinet for electrical installation works, then space for cable connections is created, but the heavy weight makes it difficult to remove and reinstall
Solution Approach 1:
By dividing the power electronics part into a lighter base part and a power stage part, only the base part (which is significantly lighter than the complete assembly) needs to be removed during electrical installation works. This reduces the physical effort and handling difficulty while still providing the necessary space for cable connections.
Solution Approach 2:
The power stage part, which contains the heavy power electronic components, is extracted and set aside during electrical installation works. Only the lighter base part remains in the cabinet, creating ample space for cable routing and connection work without requiring manual handling of the heavy power stage components.
3Device complexity
If the cooling fan is integrated into the power electronics part, then the cooling system is compact, but servicing the cooling fan requires removal of the entire heavy power electronics part
Solution Approach 1:
The cooling fan is integrated into the base part, which is separated from the power stage part. This allows the cooling fan to remain compact and integrated with its mounting structure while enabling independent removal of the base part for servicing. The segmentation creates a maintenance-friendly design where the cooling fan can be accessed and serviced without handling the heavy power stage components.
Data Source
AI summary
The invention relates to a frequency converter, comprising: a power electronics part provided with wheels on the lower part thereof; an installation cabinet for receiving the power electronics part movable on the wheels; and connectors arranged to the power electronics part and the installation cabinet, a contact being created between the connectors when the power electronics part is installed into the installation cabinet. To facilitate electrical installation works, the power electronics part is divided at least into a base part provided with wheels and a power stage part arranged thereon, the two being detachably attached together, whereby the base part, when detached from the power stage part, can be pulled out of the installation cabinet whereas the power stage part remains in place in the installation cabinet.