-The steel coupler for the motor shaft to the cluch is done!
-Drive shaft flange are ready. Custom flange from Smart fortwo shaft to Volkswagen transmision.
-I received aluminum parts from water jet cut! (laser cut and water jet is so awesome!!) I need to rework both parts to fit on the motor housing and the transmission.
You can see below the adapter for the transmission who is also the motor flange.
I do a pocket on the motor housing to pass the axle shaft..... one more time, an 11" motor is too big for a compact car transmission (Volkswagen 02A).
I need to rework the axle shaft before I can move the car by itself.
I passed the summer to design a f***ing battery pack able to perfectly fit under the small Smart Fortwo. Don't cutting any original body part to fit the pack is a real challange.
Exept that, I flirt with the idea to use the newly available A123 20Ah cells, I rethink about my 48s charging systems and I reworked my motor to stop vibration.
And now, the battery pack is under build. I expect put this one under the car this week end and try the car at high speed without abuse too much the news cells and the motor. (400-500A limit).
Pic of the assembly soon!
Finally, after few modifications, the motor weight 200 lbs (vs 240 stock with brake).
I think it’s not bad for a 250$ motor, but I think the weight/power ratio will be ordinary (more bad than Warp9 for example).
I also paint the motor. Insulating varnish inside and nice color outside!
I add spacer bellow the polar core (stator poles) to reduce the air gap between armature and stator. From 0.066” stock to 0.035” now. Anyone know what kind of percentage efficiency/torque/advantage that change will do? I see at many places that help, but how much?
What about this formula: GAP, inch= 0.005+ 0.0003 D+ 0.001 L+ 0.003 V
0.005 + (7.375x0.0003) + (4.515x0.001) + (6.76x0.003) = 0.032”
One axle shaft has perfect lenght and I shorted the second. I hope it will be support the high torque from motor.
楼主: 搬砖道人
发表于 2014-7-11 00:01:06
