So i have a 52v 40ah 2000w 60a controller conversion kit, that when i ride at full speed (max load) it only has about 1400w on the wattage meter on the screen, the bike has no torque, and barely uses any watts when from a stop, and takes a while to get to max speed. i realised most people run 45a on their 2000w not 60a, shouldnt i be getting way more power, plus i put my info into chat and it said i should be getting at least 2000w's+ of peak wattage? I beleive the battery's bms is 50a but i am not sure, and there are no labels on the battery, my UKC1 display has amps set to 60a in the advanced settings. help please!
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Not getting max wattage out of conversion kit?
- Thread starter _Jo
- Start date
Find a steep hill. Position your bike on the steepest part and give it full throttle from a dead stop. Check the peak wattage right at launch.
At top speed motor power will be low and only using power to fight wind resistance. Peak power is at stall (0 rpm) and goes down from there. The motor will take what it needs under a given load and speed.
At top speed motor power will be low and only using power to fight wind resistance. Peak power is at stall (0 rpm) and goes down from there. The motor will take what it needs under a given load and speed.
stancecoke
Minor legend
not the power, but the torque. The max torque (range A) is defined by the motor current limit, the controller is set to.
The display will show the electrical input power from battery voltage * battery current. It will show the maximum power in the whole range "B" where the battery current limit is hit. The maximum mechanical power from torque * speed is reached at the border from range B to range C. There the efficiency at max battery current is the best, so you get most mechanical output from the maximum electrical input.
But I guess, for your controller the max setting for the motor current is not known, so you will not know when the switch from range A to range B happens. Typically the motor current limit is set to about two times the battery current limit.
Motor Simulator - Web Tools - Resources
Our ebike motor simulator lets you simulate and compare different ebike setups, including speed, power, efficiency, and heat, before you build. A wide selection of hub motors are modeled, and you can add custom batteries and controllers and set vehicle parameters like throttle level, bike...
ebikes.ca
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Agreed, that's a good call out. Although you can get rid of A if the controller can provide sufficient motor amps. This made me look at the simulator again and replicate virtually the exact behavior I see from my Cycle Analyst when doing an unlimited acceleration run. It's hard to believe how accurate the simulator modeling is. Since the CA only displays battery amps and power, I can observe the exact point where B goes to C (A/B goes to C). Up until the inflection point at around 33mph, the battery amps stay pegged at around 7kw, and then starts dropping, almost exactly as shown in the model. Motor power increases steadily until the inflection point, then drops off.not the power, but the torque. The max torque (range A) is defined by the motor current limit, the controller is set to.
The display will show the electrical input power from battery voltage * battery current. It will show the maximum power in the whole range "B" where the battery current limit is hit. The maximum mechanical power from torque * speed is reached at the border from range B to range C. There the efficiency at max battery current is the best, so you get most mechanical output from the maximum electrical input.
But I guess, for your controller the max setting for the motor current is not known, so you will not know when the switch from range A to range B happens. Typically the motor current limit is set to about two times the battery current limit.
Motor Simulator - Web Tools - Resources
Our ebike motor simulator lets you simulate and compare different ebike setups, including speed, power, efficiency, and heat, before you build. A wide selection of hub motors are modeled, and you can add custom batteries and controllers and set vehicle parameters like throttle level, bike...
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damn, i wish they could have that option. Should i get a sabvoton 60a, and with a bluetooth or cable connection for programming? i really want to harness the full power.
This is why i never buy a kit, always a high quality controller, then whatever motor i want.
Sabvoton? i hear quality can be hit/miss. I'm a big fan of VESCs ( favorite brand: spintend ) for high power throttle setups.
Sabvoton? i hear quality can be hit/miss. I'm a big fan of VESCs ( favorite brand: spintend ) for high power throttle setups.
