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Old 05-16-2018, 09:25 PM
bistander bistander is online now
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Magnetic paths in motor

Quote:
Originally Posted by dyetalon View Post
What about path length for the field? There's probably a .15mm gap between one pole and the rotor, but the other pole has to go thru the backiron, bearings, shaft, half the rotor and then to the rotor tip. Doesn't sound very balanced, does it?

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Hi dyetalon,

You appear confused on motor magnetics. Here is an example of a 2-pole DCPM motor. The magnets and field in the stator including backiron do not move. The flux does not pass through the shaft.

https://quickfield.com/advanced/dc_motor_simulation.htm



Clearly shows two parallel flux paths. Nice simulation and I doubt it used iron filings as a base for the software, but you never know for sure.

Regards,

bi
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File Type: gif dc_motor_simulation-1.gif (26.0 KB, 78 views)
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