Three-Phase Asynchronous Motor with Rectilinear Stator Cores
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Solution Overview
Problem
The existing construction of three-phase asynchronous induction motors with a flat disk rotor and coaxial stator suffers from low manufacturability due to laminated L-shaped core packages and non-identical base plates, limiting sectionalization to a single pair of sections.
Innovation Solution
The motor design is enhanced by using rectilinear laminated core packages with axes parallel to the shaft axis, identical base plates, and sectioning the rotor and stator into multiple identical discs or sections, allowing for unlimited sectionalization and improved manufacturability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If L-shaped laminated core packages and non-identical base plates are used, then the motor can be constructed, but manufacturability is low and sectionalization is limited to one pair of sections
Solution Approach 1:
The motor is divided into multiple identical sections along the axial direction, with each section having the same structure comprising base plates, core packages, and rotor-disc assemblies. This segmentation enables modular manufacturing and assembly, directly resolving the limitation of being constrained to only one pair of sections while improving manufacturability through standardized components.
Solution Approach 2:
The invention transitions from using non-identical base plates to using identical base plates across all sections. This symmetry in design allows for standardized manufacturing processes and interchangeable parts, directly addressing the low manufacturability issue caused by having to manufacture different base plate designs.
2Ease of manufacture
If L-shaped laminated core packages are used, then the motor can be constructed, but manufacturability is reduced
Solution Approach 1:
The core packages are segmented into standardized rectangular laminated packages with uniform dimensions and mounting interfaces. This standardization allows for precise, repeatable manufacturing and assembly processes, improving both manufacturability and manufacturing precision compared to custom L-shaped configurations.
3Productivity
If the rotor and stator are sectioned into multiple identical discs or sections, then unlimited sectionalization is enabled and manufacturability is improved, but the construction becomes more complex
Solution Approach 1:
The motor is divided into multiple identical sections that can be manufactured independently and then assembled by stacking. This segmentation enables parallel production of sections, significantly improving manufacturing efficiency and productivity, while the modular nature actually simplifies the overall construction process despite the increased number of components.
Solution Approach 2:
Multiple identical sections are combined through standardized stacking and coupling mechanisms. The uniform interfaces and identical dimensions of each section allow for straightforward assembly, where the complexity of individual sections is offset by the simplicity and repeatability of the joining process, ultimately improving manufacturing efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design increases manufacturability and maintainability, expands the range of motor modifications, and optimizes the internal volume usage of the stator, enabling more flexible and efficient construction of the motor.
Implementation Method 1
three-phase asynchronous engine (induction motor) including a rotor as a flat disc, and a stator, which is coaxial to the rotor
Implementation Method 2
stator, which is coaxial to the shaft, and is installed with a working backlash relative to the plane of a rotor's disk
Data Source
AI summary
The invention concerns the electric asynchronous engines including a rotor as a flat disc, and a stator, which is coaxial to the rotor, and is installed with a working backlash relative to the rotor's disk. The stator includes three laminated packages of cores with phase coils, which are situated around the shaft of the motor under 120° angle, one in relation to other. The cores' packages are enclosed between the first and the second flat base plates, which are executed from nonconductive material, and the planes of the base plates are perpendicular to the axis of the shaft. The cores are executed as rectilinear laminated packages, and their axes are parallel to the shaft's axis. The second base plate is identical to the first one, and the butt-ends of the other side of the cores' packages are fixed in it. The invention is presented in three variants, where different fulfillments of the motor are shown: with a sectioned stator, with a sectioned rotor or with the stator and the rotor both sectioned.