irf23 said:
Makes sense. Thanks. I would consider the 8T over the 10T for sure.
I'd select 8T GMAC at 36V you selected. It'll better low end torque than DD. It is good to have a motor a little faster than what you'd have at rated voltage. Wheel RPM is proportional to voltage. You want about 25% margin to maintain pace near the end of the trip and pack voltage is dropping to around 30V. 10T with 48V.
I suggest phaserunner set something like 20A battery current limit and 70A phase current limit. Baserunner was mentioned somewhere, but isn't rated for the higher phase current requirements of that motor.
Many here disregard the law, that's fine, but I'll just say it anyway. You have a generous 32kph and 500W legal limit in BC. From your stated desire for 32kph limit I assume you want to keep it close to legal. At least to avoid ticketing and perhaps protect insurance. 16A at rated voltage is about your legal power limit. I'd set the controller current limit at 20A and power limit at 580W for when the battery is below rated. That is based on Grin Motor Simulator model. 500W will give you about 24kph on 7% at 100kg total mass with a (reasonably fit, but not racer) human input of about 150W.
Unfortunately CA is not smart enough for rpm based power limits that could allow 500W to the road at most speeds. Fatter torque curve of the GMAC is advantageous.
If you are trying to protect insurance it is a good idea to add a simple PAS sensor (it is required) to your shopping list and set absolute speed and power limits in the controller, not CA. It will give law and insurers less against you especially if it becomes a disability compensation fight where you could be left with nothing.
https://ebikes.ca/tools/simulator.html?motor=GMAC8T&batt=B3617_35E&cont=cust_20_70_0.02_A&wheel=26i&throt=80&hp=150&frame=cust_0.65_0.006&autothrot=false&black=grade&mass=100&___store=canadian&___from_store=canadian&cont_b=cust_20_80_0.02_A&motor_b=GMAC8T&batt_b=B3617_35E&wheel_b=26i&frame_b=cust_0.65_0.006&mass_b=150&hp_b=150&throt_b=100&___from_store=international&grade=6&autothrot_b=false&axis=kph&temp=34&grade_b=6&tf_b=30&tr_b=16&gear_b=1&temp_b=34
Also ignore the maximum temperature in the Grin motor simulator (redline is too high anyway) and use the trip simulator instead. It'll give you a better idea of real world temperatures. You can use a Cycle Analyst and/or Phaserunner for power roll back at something more reasonable like 90-100C and 100-110C cut off. Lower is better for motor longevity.