I smoked a Vado and thought of something but didn't know where to post it, so I thought I'd post it here.
The problem I have with my hub motor is that if I lose speed going up hill, I lose most my power and torque as well, and the motor has drag from the cogging of the magnets.
@indianajo mentioned his 12t geared hub motor that will pull hard up hill but doesn't go very fast.
So I have a Velotric Go 1, It's unlocked to go 25 mph, but I live in a somewhat hilly area and would like to get more power to climb some of the hills around here. Can I put a Front Hub Kit on my Go 1 and get more power without one tire going faster or slower than the other? I do have...
forums.electricbikereview.com
I was wondering about replacing the magnets in the outer part of the motor with electromagnets?
The inner core of the hub motor would remain the same, and the outer core would be energized using brushes and contacts on the axle to feed power to the outer core.
The wires to feed the outer core could feed into the motor on the other side of the axle, if the axle is hollow all the way through, instead of just drilled half way.
That would also allow for fatter/better wires to feed the motor power from the controller on one side, and all the Hal sensor, and new electromagnet wires on the other side.
The outer core would operate like an alternator in your car.
An alternator has no resistance spinning the armature until power is applied to energize the electromagnets. The more voltage that is applied, the more power the alternator puts out.
An alternator does have brushes to feed the electromagnet, BUT there is very little power needed to energize the electromagnets. The power output is hard wired and doesn't travel through the brushes on the armature.
The inner core would remain the same, and the motor power goes through the Three Phase wires from the Controller as normal.
I figure probably 3 contacts and maybe a ground for the armature, like the schematic diagram for the alternator on my car,..
The power to energize the electromagnet(s?) runs through the tiny LG/W wire that uses Very Little energy. The brushes can last 200,000 miles or more and aren't even replaceable. (Although I've done it, but I had to take the alternator apart. Brushes used to be screwed in place and could be removed from the outside.)
I've only ever worn out my alternator brushes once when I had a HUGE Stereo in my car, and my alternator was Always Maxed Out.
My headlights used to dim with the bass beat of my music, as my alternator struggled to keep up.
This is another picture I stole from the interweb,..
It shows the magnets, and I'm sure they are arranging alternating between North and South poles around the circumference of the outer motor core?
If these magnets were electromagnets instead, I assume that they could be much more powerful, have no drag when Not energized, AND I'm sure you could group them together to Emulate a 6t and 3t hub motor buy switching the electromagnets into groups of 1, 2, or 3 electromagnets to work together to make a single North or South pole?
There may be another wire needed to allow for switching of the poles, but there is NO extra computer programming, AI, Robots or fake Clouds of surveillance involved.
Just basic mechanics and electronics.