Thingiverse
![PMA (Permanent Magnet Alternator) Generator Conversion by relic](/previews/8313365.jpg)
PMA (Permanent Magnet Alternator) Generator Conversion by relic
by Thingiverse
Last crawled date: 3 years, 1 month ago
PMA (Permanent Magnet Alternator) Generator Conversion.
UPDATE: Left the project for a week or more and took a vacation. Now experimenting again. New images show to remove the 3 remaining screws in the stator assembly to access/remove the remaining diodes, regulator and any brush parts. Get the inside of stator housing down to bare metal.
No power ... yet. I tried soldering directly to where the coil ends are exposed but suspect that there are still diodes (possibly defective) on the other side. The remaining regulator may also pose a problem.
I've heard that older GM alternators are much easier to work with but will eventually get this Subaru to work!!! I also posted a schematic of the WRX wiring.
Converts a Subaru alternator to a PMA / Generator. Designed around a 2003 WRX spare alternator. Keep the 4 rotor assembly bolt and trash the rotor. No excitation required. This one has the diodes & regulator built in.
Uses a 9.5mm shaft x 100mm and neo disc (N42) magnets measuring 1.26(32mm) by 1/8th inch thick. 6 magnets on the new rotor oriented north - south - north - south for normal 3 phase coil output. Keep diodes for DC output ... or bypass for AC.Use a hair dryer to slightly soften the rotos magnet holes for a TIGHT fit
May fit other imported alternators - OD of housing = 134mmx30mm. Rotor OD = 94mmx50mm
UPDATE: Left the project for a week or more and took a vacation. Now experimenting again. New images show to remove the 3 remaining screws in the stator assembly to access/remove the remaining diodes, regulator and any brush parts. Get the inside of stator housing down to bare metal.
No power ... yet. I tried soldering directly to where the coil ends are exposed but suspect that there are still diodes (possibly defective) on the other side. The remaining regulator may also pose a problem.
I've heard that older GM alternators are much easier to work with but will eventually get this Subaru to work!!! I also posted a schematic of the WRX wiring.
Converts a Subaru alternator to a PMA / Generator. Designed around a 2003 WRX spare alternator. Keep the 4 rotor assembly bolt and trash the rotor. No excitation required. This one has the diodes & regulator built in.
Uses a 9.5mm shaft x 100mm and neo disc (N42) magnets measuring 1.26(32mm) by 1/8th inch thick. 6 magnets on the new rotor oriented north - south - north - south for normal 3 phase coil output. Keep diodes for DC output ... or bypass for AC.Use a hair dryer to slightly soften the rotos magnet holes for a TIGHT fit
May fit other imported alternators - OD of housing = 134mmx30mm. Rotor OD = 94mmx50mm
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