ePhat
1 mW
First of all, thank you in advanced for even clicking on the link to try and help me out. This is my first build and I'm kind if surprised I made it this far without needing some assistance.
I purchased a couple BMC hub motors/controllers from another member here on ES. He ended up being local and has been a great help during the build, but I have an issue and believe it's one if the motors.
This is the scenario:
I roll on the throttle and one if the motors cuts out at about 1/2. I have to cycle the throttle off and on in order for it to power up again. When this occurs, the diagnostic lights on one of the controllers goes solid red while the other remains flashing like everything is ok. It was also noted by a friend that rode the bike last weekend that the motor cut out when he hit some bumps. I've also noted the the front motor seems to b a little noisier with very low throttle input on the stand.
You may have been observant and noticed that I said "one" of the motors cuts out. That's because it's two wheel drive. The bike is very heavy and I wanted to have a good workhorse to get me up the hills around here. So I went with two motors.
Here's my equipment:
The bike - 2012 Phat stretch beach cruiser with modified frame. Rigid frame and solid forks.
The hub motors - 2x V4C BMC geared hub motors on the front and rear
photo 2
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The controllers - 2x BMC (might be someone else's repackage)
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The Battery -
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Here's a photo of the chart that shows what the lights mean when the flash
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Diagnostic steps taken so far:
* Swapped controllers from front to rear.
* Replaced and overlayed a harness to the front motor.
* Set both controller jumpers for smooth start and limited to 30A max current
* Ruled out the battery and switch since I have run both systems independent of each other and the issue only occurs with the front motor.
I haven't purchased a CA yet. I do have a watts up meter, but have not wired it in yet.
In all fairness I believe that I might have a secondary issue that happens when I have a full charge and roll on the throttle too hard and both motors shut down. I believe this is an issue with the battery being limited to 40A. When this happens, the solid light happens only on the front motor.
I have also added some connectors on the front forks to disconnect close to the hub. This was to make it easier to remove for transport since the front wiring is routed through the frame.
Please let me know if I'm on the right track. I haven't had one of these hubs apart yet, and haven't found much documentation on disassembly. I think the final step would be to swap the windings out of a known good, but I think I might have to purchase it first. any other ideas.
I purchased a couple BMC hub motors/controllers from another member here on ES. He ended up being local and has been a great help during the build, but I have an issue and believe it's one if the motors.
This is the scenario:
I roll on the throttle and one if the motors cuts out at about 1/2. I have to cycle the throttle off and on in order for it to power up again. When this occurs, the diagnostic lights on one of the controllers goes solid red while the other remains flashing like everything is ok. It was also noted by a friend that rode the bike last weekend that the motor cut out when he hit some bumps. I've also noted the the front motor seems to b a little noisier with very low throttle input on the stand.
You may have been observant and noticed that I said "one" of the motors cuts out. That's because it's two wheel drive. The bike is very heavy and I wanted to have a good workhorse to get me up the hills around here. So I went with two motors.
Here's my equipment:
The bike - 2012 Phat stretch beach cruiser with modified frame. Rigid frame and solid forks.
The hub motors - 2x V4C BMC geared hub motors on the front and rear
photo 2
Untitled
The controllers - 2x BMC (might be someone else's repackage)
Untitled
The Battery -
Untitled
Here's a photo of the chart that shows what the lights mean when the flash
Untitled
Diagnostic steps taken so far:
* Swapped controllers from front to rear.
* Replaced and overlayed a harness to the front motor.
* Set both controller jumpers for smooth start and limited to 30A max current
* Ruled out the battery and switch since I have run both systems independent of each other and the issue only occurs with the front motor.
I haven't purchased a CA yet. I do have a watts up meter, but have not wired it in yet.
In all fairness I believe that I might have a secondary issue that happens when I have a full charge and roll on the throttle too hard and both motors shut down. I believe this is an issue with the battery being limited to 40A. When this happens, the solid light happens only on the front motor.
I have also added some connectors on the front forks to disconnect close to the hub. This was to make it easier to remove for transport since the front wiring is routed through the frame.
Please let me know if I'm on the right track. I haven't had one of these hubs apart yet, and haven't found much documentation on disassembly. I think the final step would be to swap the windings out of a known good, but I think I might have to purchase it first. any other ideas.