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To determine the formula for the outer diameter of a stator, primarily in the context of electric motors or generators, you first need to consider several factors, including the application-specific design, the size of the internal components (like the rotor), the amount of insulation required, cooling needs, and the overall electromagnetic design principles. However, there is no universal formula that directly gives the outer diameter of the stator because it depends on a number of design choices and the specifics of the application it is being designed for.
Typically, the design process might start with the power requirements, operational speed (RPM), and the specific electric and magnetic properties desired. From these, an engineer can determine the necessary size of the rotor, the number of windings, the air gap between the stator and rotor, and then, finally, the overall dimensions of the stator including its outer diameter.
For a rough approximation, assuming you have the design parameters related to the electromagnetic aspects (like air gap dimensions, magnetic flux density, current density, etc.), you might work through several calculations:
1. Starting with the power equation or torque requirements to get an initial size for the core and windings.
2. Adjusting for efficiency and heat dissipation needs, which might increase the size.
3. Adding dimensions for the housing, required insulation, and cooling channels or systems.
In practical engineering, software tools and empirical data from similar designs are often used to optimize these dimensions.
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