On Tue, 27 Jun 2023, gene heskett wrote: > On 6/27/23 10:37, fxkl47BF--- via Emc-users wrote: >> i've a hankering to build a gasoline powered battery charger >> i attached a crude idea >> the motor is the box and the alternator is the cylinder >> they are attached with a rigid coupler >> auto style alternators have no machined surface to mount >> i'm trying to not use a belt or flex coupler >> the alternator is hanging with the two vertical rods to prevent rotation >> since the direction of rotation is anticlockwise from the alternator end >> if the rods are properly placed the torque should lift the alternator >> and prevent excess stress on the motor bearings >> is this too simple >> > Not as visualized here. Three problems I do see: > > 1. most gas engines run slower that an auto alternator is used to, the > typical belt arrangement on a modern engine spins the alternator 2 to 5 > times the engine revs. So full amperage will probably not be obtained.
i thought i'd get an alternator with more capacity than i need run it at less that full load may extend the life > > 2. Alignment under the vibration of a 1 cylinder IC engine will hammer > the bearings more than the sideways pull of a belt would. Use a flexible > coupling. all ac alternators are direct coupled i thought i'd take a hint from them > > 3. Voltage regulation is in modern alternators and sucks dead toads thru > soda straws for accuracy, so you may be forced to do your own hunting > for an older alternator with a separate field bolt, and build your own > regulator as the internal one is the main reason for boiling the battery > dry well before its time. I've done that, but I'm also a C.E.T.. I wore > out 4 vehicles back in the 70's to 85's time frame with that same > alternator/battery/regulator transplanted to each vehicle I bought, > starting in -30F weather was never a problem. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
