Vertically stacked Stators and Rotors Permanent Magnet Alternator

AI Thread Summary
A fabricated permanent magnet alternator (PMA) utilizing vertically stacked stators and rotors has been tested, showing increased output at lower RPMs due to parallel connections that reduce internal resistance. The design effectively uses flux lines from both ends of the magnet, requiring fewer magnets compared to dual rotor configurations. Data collected indicates varying output and internal resistance based on the number of stators and RPMs. The discussion seeks a mathematical solution to predict output at higher RPMs based on the gathered data. Online calculators for PM motors may assist in further analysis.
BurnIt0017
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Greetings, I fabricated a PMA using vertically stacked stators and rotors. I tested the unit on a lathe and was able to gather the following data at different RPMs. The design uses the flux lines from both ends of the magnet. This configuration allows the stators and rotors to be stacked vertically. The stators are connected in parallel so the internal resistance drops, output increases at lower RPMs as more stators and rotors are added. The configuration uses less magnets than dual rotor designs with fixed internal resistance. Is there a mathematical solution to predict output at a higher RPMs using the data that I have been able gather?1 Stator ,
Amps , RPM, Internal resistance
0.38 , 190, 4.3 ohms
2.06 , 310
3.8 , 440
2 Stators
0.51 , 189 , 2.4 ohms
2.06 , 310
3.8 , 340
3 Stators
1.56 , 186 , 1.9 ohms
2.95 , 270
6.5 , 340
 

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There are several online calculators for PM motors. Generators and motors are mostly the same thing. Try here

https://ecalc.ch/
 
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