Lebowski
10 MW
time to build something again
Over the winter I build a 2 kW triple stator axial flux motor for my recumbent. The goal is a bike where the motor
goes through the transmission so that it will climb the hills around here (which can be up to 15% incline).
The original idea was something like this:
but the motor hit my legs So: new idea and how it'll be (still has 9 to 10 cm of groundclearance):
The idea is that you can either cycle, run on the motor alone or both. Both the motor and the jackshaft are based on a Deore rear wheel bike
axle with a freewheel. From the motor (12T sprocket on the freewheel) the chain will go to the jackshaft (52T sprocket fixed to hub).
A steel 22T sprocket (also fixed to the hub of the jackshaft) will then go with a chain to the rear, where a derailleur will provide 7 or 8 ratio's.
From the pedal (55T) a chain will go to a sprocket (about 22T) on the freewheel part of the jackshaft.
As far as rpm's go: with 90rpm at the pedals the jackshaft will rotate at 225 rpms and the motor at 975 rpms.
From above:
I typically build quite rudimentary as I'm lacking in the skills departement. Also, I build in my spare bedroom so I cannot weld or anything.
I'll use lots of 15x15 mm aluminium square tubing (2mm wall thickness), lots of 6mm thread which can be bent to make U-bolts, and
flat 3mm aluminium sheet.
Over the winter I build a 2 kW triple stator axial flux motor for my recumbent. The goal is a bike where the motor
goes through the transmission so that it will climb the hills around here (which can be up to 15% incline).
The original idea was something like this:
but the motor hit my legs So: new idea and how it'll be (still has 9 to 10 cm of groundclearance):
The idea is that you can either cycle, run on the motor alone or both. Both the motor and the jackshaft are based on a Deore rear wheel bike
axle with a freewheel. From the motor (12T sprocket on the freewheel) the chain will go to the jackshaft (52T sprocket fixed to hub).
A steel 22T sprocket (also fixed to the hub of the jackshaft) will then go with a chain to the rear, where a derailleur will provide 7 or 8 ratio's.
From the pedal (55T) a chain will go to a sprocket (about 22T) on the freewheel part of the jackshaft.
As far as rpm's go: with 90rpm at the pedals the jackshaft will rotate at 225 rpms and the motor at 975 rpms.
From above:
I typically build quite rudimentary as I'm lacking in the skills departement. Also, I build in my spare bedroom so I cannot weld or anything.
I'll use lots of 15x15 mm aluminium square tubing (2mm wall thickness), lots of 6mm thread which can be bent to make U-bolts, and
flat 3mm aluminium sheet.