I popped some of the FETs in my controller yesterday, while messing around tuning my throttle ramp rates. I was slowing the ramp little by little, to just below where the bike would wheelie from a stop or low speeds. I almost had it perfect when I twisted the throttle and the motor let out an ugly groaning sound. I let off and gave a little throttle and the motor groaned and shuttered. I shut the bike down, and powered it back on after waiting a few seconds. The CA came on, but throttle did nothing. I tired pedaling it, and felt a bunch of resistance. No way to pedal home like that, so I disconnected the phase wires, which freed up the wheel. I ended up pedaling home; I have to remember to only do that kind of testing near home, instead of after riding two towns over. :| Checked the controller when I got home...after recuperating for a while, and sure enough, shorted.
I'm going to end up replacing the FETs since I like the controller, but I think I'm going to shop for a comparable spare controller now, in case the damage is more extensive or if parts aren't easy to get.
I'd like to find something with the following specs. The max dimensions for height and width can't be exceeded, but some of the other specs are more flexible. I really would like to stay below $300 and not have to wait too long to get it; even though realistically, this could just turn into my winter upgrade.
I've found a couple that may work, linked at the bottom. I'd like to hear about what options are available besides what I've found so far.
Max Dimensions:
Voltage:
Current/Power:
Features:
Cost:
Availability:
Looks like this Far-Driver controller might work:
https://www.ebay.com/itm/224979800204
but the shipping time could be pretty long.
This model has more power, and costs more, but the shipping time is decent. I don't think the dimensions will work though:
https://www.ebay.com/itm/224904002867
I see a few threads on these controllers, although not these models, and I'm just starting to read them. I noticed they sell the same brand on the QSMotors website.
I also see some branded Votol that look similar in design. A Sabvoton or Kelly may meet the specs, except they are both too bulky for my purpose. The one I popped the FETs on is the 7kW PowerVelocity. I probably should have set some upper power limits before messing around
I'm going to end up replacing the FETs since I like the controller, but I think I'm going to shop for a comparable spare controller now, in case the damage is more extensive or if parts aren't easy to get.
I'd like to find something with the following specs. The max dimensions for height and width can't be exceeded, but some of the other specs are more flexible. I really would like to stay below $300 and not have to wait too long to get it; even though realistically, this could just turn into my winter upgrade.
I've found a couple that may work, linked at the bottom. I'd like to hear about what options are available besides what I've found so far.
Max Dimensions:
- Height: 60mm; Width: 105mm; Length: unconstrained
Voltage:
- Required: 14S to 20S; Desired: 13S to 22S
Current/Power:
- 70A battery; 200A phase
Features:
- Required:
- Programmable
- Sine Wave/FOC
- 3-speed switch
- Regen – any form, variable preferred, but force configurable - brake lever/variable/slip
- Desired:
- CA connector
- Cruise control
- Field weakening
Cost:
- $200, up to $300
Availability:
- Receipt within ~4-6 weeks
Looks like this Far-Driver controller might work:
https://www.ebay.com/itm/224979800204
but the shipping time could be pretty long.
This model has more power, and costs more, but the shipping time is decent. I don't think the dimensions will work though:
https://www.ebay.com/itm/224904002867
I see a few threads on these controllers, although not these models, and I'm just starting to read them. I noticed they sell the same brand on the QSMotors website.
I also see some branded Votol that look similar in design. A Sabvoton or Kelly may meet the specs, except they are both too bulky for my purpose. The one I popped the FETs on is the 7kW PowerVelocity. I probably should have set some upper power limits before messing around