[Lizard]

Next fail.

Tried the TPPower TP5840S 1600V on 6s geared for 184kph (same as with the TP4070) in the meantime. Motor weighs 765grams.

First test was with Torque Control set to 4.5 (like with the 1717 and TP4070). Didn't accelerate very well and maximum speed was just 135kph. Temps were around 50C after the pack. So obviously, Torque Control set way too low. What's weird, because the 4070, 1717 and 1515 required pretty similar values, all around 4 or 5. At first I thought it's because of different motor design or pole count and set it to 8.0 (Which is basically "off", with my other motors, everything above 6 becomes pretty much un-noticeable).

With that setting, acceleration in low and mid rpms was very good, lots of torque, alot more than the 1717 and 4070. Cogging from a standstill was also alot better when compared to the 1717 or the TP4070. But it ran hot pretty fast (72C after a few mins) and I could only reach 165kph, had the feeling torque diminishes faster with higher RPMs than with the 4070 or 1717. The 4070 got 172kph with the same gearing. Also the 10AWG battery cables and EC5 connectors got quite warm, never had that happen before. ESC was also over 60C after a few minutes, usually it never goes above 50C, even in summer after a full pack.

So it looks like that thing draws crazy amounts of current. Since a much higher torque control value was needed to get (nearly) the same topspeed, I think it is drawing those high currents mostly at high RPMs? I.e. it is inefficient at higher RPMs. Maybe another test with lots of hard acceleration but driving no faster than around 130kph will show if it's the RPMs that are causing this. If it stays cool then, I'd say 6-Poles are not for "higher" RPMs (that "losses get too high above 60k ERPM thing" Vedder talkes about on his Blog). Bummer, since I need around 35k RPM in the Slash because I can't gear taller.