HAL9000v2.0
10 kW
I have epoxy glue that can resist 350°C and it came from this company---> http://www.intertronics.co.uk
Product is OPT 5054-T
Product is OPT 5054-T
Alternator to Motor Conversion
- Thread starter Dee Jay
- Start date
POPS
10 mW
Thanks for the welcome and the kind words paultrafalgar. I'll drop by the local chevy dealer and see what I can find out. POPS
paultrafalgar
10 kW
frodus said:Its currently in our shop
We just replaced 2 batteries (after 3 years). The thing is CRAZY fast... I've never gone full throttle. It'l do a burnout. We broke 2 front wheels doing doughnuts around the shop. Its pretty neat.... 2 AC controllers, hooked to 2 alternators (we just broke the windings out so there were 3 phases, and ran them out to the controller). The alternators have slip rings and a field coil in the armature (it doesn't commutate). The AC controller has 3 phases and an extra output to "excite" the field on the armature. Fully programmable, regen, 150A per phase, 60V.
If there's enough interest, we'll start making them again.
This thread is FAR TOO IMPORTANT to allow to die!
Wheel in the crash cart and stand clear!
Miles has one of the few motors designed by Ebike-maui (if I'm not mistaken) that were commercially produced (10 only made!?) on his superb ebike. Now Frodus tells us that his company can re-start production. So let's not lose the opportunity. Can you show some pictures, Frodus, of the motor (external and internal) and of the bike you have it in (showing the drivetrain). I seem to remember that the un-glueing of magnets (as has been discussed here) is the problem with the original batch of motors. Is that a problem with the motor you are talking about, Frodus? Is it in fact the very same motor? If that is the problem can we redesign the "magnet holding mechanism" to get over the problem? Dovetail magnet slots - better epoxy - kevlar encircling strap - whatever.
HHHHHHHHHEEEEEEEEELLLLLLLLLLPPPPPPPPPPP! We're losing the patient!
:lol:
It sounds like they're not using magnets at all, just the original electromagnet in the alternator rotor (field winding). The field winding in the one I took apart drew about 2 amps at 12 volts.
The field winding would need to controlled to minimize losses and to give you the field weakening effect which greatly extends the rpm range of the motor.
Most stock alternator rotors can withstand over 20,000 rpm without flying apart.
The downside of this is the controller is more complex and all the power going into the field winding is wasted power. At high power levels, this wasted power may be a fairly low percentage of the total.
The field winding would need to controlled to minimize losses and to give you the field weakening effect which greatly extends the rpm range of the motor.
Most stock alternator rotors can withstand over 20,000 rpm without flying apart.
The downside of this is the controller is more complex and all the power going into the field winding is wasted power. At high power levels, this wasted power may be a fairly low percentage of the total.
EbikeMaui
1 kW
- Joined
- Mar 10, 2007
- Messages
- 447
Some good guesses but without making many versions it will be hard to get what you expect until you learn from mistakes.
Do everything perfect you may get 93% to 94% efficiency in a vary broad RPM and Voltage range using only 50 watts to freespin at 4000 rpm with about 75 ft lbs of torque when ever you need it. I never run it past 1600 watts but it will take much more without the silly fan someone glued on to Miles motor. You will notice how fast it will go in 5 seconds in the last video. It will do that in first or second gear. It doesn't need the 3 speed hub to go up to 35 mph.It can easily do that and go up steep hills with a single speed.
http://tinyurl.com/222xb8
http://tinyurl.com/48h6uv
http://tinyurl.com/292hjc
http://tinyurl.com/dm4tom
Do everything perfect you may get 93% to 94% efficiency in a vary broad RPM and Voltage range using only 50 watts to freespin at 4000 rpm with about 75 ft lbs of torque when ever you need it. I never run it past 1600 watts but it will take much more without the silly fan someone glued on to Miles motor. You will notice how fast it will go in 5 seconds in the last video. It will do that in first or second gear. It doesn't need the 3 speed hub to go up to 35 mph.It can easily do that and go up steep hills with a single speed.
http://tinyurl.com/222xb8
http://tinyurl.com/48h6uv
http://tinyurl.com/292hjc
http://tinyurl.com/dm4tom
paultrafalgar
10 kW
Hi Bob, not related to EbikeMaui by any chance? :wink:
paultrafalgar
10 kW
I wonder if anyone here would be interested in this sequence of 4 videos on youtube:
http://www.youtube.com/watch?v=rrNYIqhkTQc Converting Alternator to Motor
http://www.youtube.com/watch?v=Cqf4ICwFBIU Converting Alternator to Motor Part 2
http://www.youtube.com/watch?v=wgqD7avNtyE Converting Alternator to Motor Part 3
http://www.youtube.com/watch?v=NGhJBQN0z2o Converting Alternator to Motor Part 4
He's converting a car alternator to run as a stepper motor. I don't know how relevant that is to the business of driving an ebike, but perhaps some of the EEs here could offer a view on that?
http://www.youtube.com/watch?v=rrNYIqhkTQc Converting Alternator to Motor
http://www.youtube.com/watch?v=Cqf4ICwFBIU Converting Alternator to Motor Part 2
http://www.youtube.com/watch?v=wgqD7avNtyE Converting Alternator to Motor Part 3
http://www.youtube.com/watch?v=NGhJBQN0z2o Converting Alternator to Motor Part 4
He's converting a car alternator to run as a stepper motor. I don't know how relevant that is to the business of driving an ebike, but perhaps some of the EEs here could offer a view on that?
i was wondering do i have to rewire the stator?
because i have an alternator from i think a 90's gm car and the startor is wired in the delta not a star.
delta is where all 3 phase windings are wired in series in 1 big loop
the star is where the 1 end of the 3 phase windings are connected and the other end is left open.
http://en.wikipedia.org/wiki/Brushless_DC_motor
because i have an alternator from i think a 90's gm car and the startor is wired in the delta not a star.
delta is where all 3 phase windings are wired in series in 1 big loop
the star is where the 1 end of the 3 phase windings are connected and the other end is left open.
http://en.wikipedia.org/wiki/Brushless_DC_motor
enoob
1 kW
Thud said:
hhmm . just found this thread. that link is from an inrunner rotor im working out to give me a halbach array . i just noticed that the od of this setup and the id of the stock stator on a delco alternator are within millimeters of eachother.
heres the thread
http://endless-sphere.com/forums/viewtopic.php?f=28&t=14264&p=212761#p212761
