Switched Reluctance Motor End Plate Rotor Balancing
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Solution Overview
Problem
Large-sized switched reluctance motors face challenges in accommodating and balancing rotors within constrained spaces, and the laminations are prone to damage during handling.
Innovation Solution
An end plate with an annular body and radially extending ribs is designed to support the rotor poles, providing axial retention and balancing the rotor mass, while minimizing electromagnetic interference and heat generation by using a dense material like ductile iron and optimizing the footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a large-sized rotor is used to provide sufficient balance mass for balanced rotation, then rotor balancing is improved, but the space required increases and accommodation becomes difficult in constrained spaces
Solution Approach 1:
The end plate is designed with an annular body that functions as a counterweight to provide the necessary balance mass for rotor balancing. By positioning the balance mass in the end plate rather than enlarging the entire rotor, the solution achieves proper balancing while maintaining a compact overall footprint that fits within constrained spaces.
2Power
If the rotor size is increased to accommodate larger applications, then power output is improved, but the rotor becomes more prone to damage during handling
Solution Approach 1:
The ribs are pre-positioned on the end plate to extend radially outwardly and engage with the rotor poles before the rotor undergoes any handling or operation. This preliminary engagement provides structural support and protection to the rotor poles during assembly and handling operations, preventing damage while allowing the rotor to maintain its large size for high power output.
3Stability of the object's composition
If more balance mass is added to the rotor, then rotor balancing is improved, but the weight and inertia increase
Solution Approach 1:
Instead of uniformly increasing the entire rotor mass to achieve balancing, the end plate is designed with a specific annular configuration that concentrates the balance mass only where needed. The ribs extend radially outwardly to engage with the rotor poles, providing localized balance mass that achieves proper rotor balancing without unnecessarily increasing the overall weight of the moving rotor assembly.
Data Source
AI summary
An end plate for a rotor of a switched reluctance motor is disclosed. The end plate includes an annular body and a plurality of ribs. The annular body has a first axial end, a second axial end, and a thickness. Further, the annular body defines an outer surface and a bore configured to receive a shaft of the rotor. The plurality of ribs extends radially outwardly from the outer surface. The plurality of ribs is adapted to respectively abut with a plurality of poles of the rotor.