How to test an electric bike hub without power
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- Опубликовано: 16 окт 2024
- This is how to test the 3 main phases of a brushless hub motor by turning it into an electric brake.
0:03 Spin the motor, it should spin quite freely. NOTE: Geared hubs will be slightly harder to spin in one direction than the other. For this test spin geared hubs spin the hub in the direction that is hardest.
0:14 Look at the plug hub motor plug/socket. Find the 3 main power wires. They will be the 3 thickest wires. This is a female plug on this particular hub.
0:18 Get a loop of wire or paper-clip (with the ends stripped off) and short 2 of the main power wires.
0:27 Spin the hub. If it's very hard to spin, at least 2 coils are good.
0:45 Remove the wire and short the last remaining main power wire with either of the previously tested main wires. Spin the hub again. If it's hard to spin, all 3 coils are good.
0:55 Remove the wire and check the hub now spins freely.
1:00 Shows a male hub motor plug. These can be shorted with a pair of long nose pliers to do the same test.
You need to verbally explain what you pointing to so I know what I'm looking for. I understand your jumping, what am I jumping?
The wore will 3x thick wires and 5 or so thin ones. You need to jump the thick ones.
i agree, this video is a very poor explanation of what's being done.
ur jumping the motor phase wires. there are three in all brushless DC motor - always green, blue and yellow. these are your main BIG (thick) wires.
when you short two of them and spin your wheel backwards there will be high resistance (hard to turn wheel) if wires are good. if u jump all three then the resistance is even greater...a good sign that a motor problem is not coming from the motor phase wires.
(those other 4-6 smaller holes/wires are for your hall sensor wires)
also, this ONLY works on brushless DC motors (spinning wheel backwards). for brushed motors u would spin wheel in forward direction.
Very poorly explained video. I agree.
/bklyn 👑
@@robertmotion incorrect that it only works on brushless DC motors when spinning in reverse. You forget to mention a huge detail in your overly long reply.
Brushless DC ebike hub motors come in direct drive and geared type. Direct drive will have resistance when shorted on both directions, geared (which usually but not always have a clutch) will only have resistance when spin in reverse when shorted.
@@robertmotion Do you know about 48V 8000w hall sensors ?
On my Brushless motor I have 1 sensor that's no good, I cannot find that type at all anywhere do you think the 41F would work if I just used that one or should I change all 3 in order for it to change phase equally 🤔
@@transitman61 change all of them out, or run a sensor-less controller. It will however run with a little more noise and be a little more harsh at low speed.