So I grabbed a Heinzmann 400w 24/36v motor hub of Ebay and it should be getting to me tomorrow.
I'm a pretty epic cheapskate and was wondering what would be the cheapest way to run this thing over several years.
I've got a 36v 10ah LiFePo4 battery back on the way, but apparently the BMS is only on the charger, so it only is managed for charging, not discharging. My questions are:
1) Can I run the motor without a controller? Like, straight to the battery with a push-button switch on the handlebar, or possibly a potentiometer? I'm wondering if the motor will try to pull more watts than it's rated for and damage itself.
2) Can I run the battery without a discharging BMS? I have only have a two-mile commute between charges so I don't see myself discharging to levels that could damage the battery.
3) I see some inexpensive ($30) motor controllers on Ebay that have undervoltage protection (at 31v), would that be a reasonable substitute for a discharging BMS? Link is at: http://cgi.ebay.com/ebaymotors/Electric-E-Scooter-Bike-Parts-Motor-Controller-36V-350W_W0QQcmdZViewItemQQ_trkparmsZ65Q3a15Q7c66Q3a4Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q3a200QQ_trksidZp3286Q2ec0Q2em14QQhashZitem27a4efcc7eQQitemZ170270903422QQptZOtherQ5fVehicleQ5fParts
Thanks for the help guys, my bike was free, and I only spent $200 on the Heinzmann and $200 on the LiFePo4, so I'm just looking for the most economical, barebones solution that's not going to destroy my components in a few years.
I'm a pretty epic cheapskate and was wondering what would be the cheapest way to run this thing over several years.
I've got a 36v 10ah LiFePo4 battery back on the way, but apparently the BMS is only on the charger, so it only is managed for charging, not discharging. My questions are:
1) Can I run the motor without a controller? Like, straight to the battery with a push-button switch on the handlebar, or possibly a potentiometer? I'm wondering if the motor will try to pull more watts than it's rated for and damage itself.
2) Can I run the battery without a discharging BMS? I have only have a two-mile commute between charges so I don't see myself discharging to levels that could damage the battery.
3) I see some inexpensive ($30) motor controllers on Ebay that have undervoltage protection (at 31v), would that be a reasonable substitute for a discharging BMS? Link is at: http://cgi.ebay.com/ebaymotors/Electric-E-Scooter-Bike-Parts-Motor-Controller-36V-350W_W0QQcmdZViewItemQQ_trkparmsZ65Q3a15Q7c66Q3a4Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q3a200QQ_trksidZp3286Q2ec0Q2em14QQhashZitem27a4efcc7eQQitemZ170270903422QQptZOtherQ5fVehicleQ5fParts
Thanks for the help guys, my bike was free, and I only spent $200 on the Heinzmann and $200 on the LiFePo4, so I'm just looking for the most economical, barebones solution that's not going to destroy my components in a few years.
