The torque control is superb with three sensor/phase setups. The throttle response feels very smooth and natural.
The controller temp is monitored all the time by the firmware and safety power rollbacks are autoMagic.
Technically, it should be impossible to overheat it. You can also monitor temperatures through the phone/watch apps.
Mosfets in controllers blow up under load/acceleration not so much due to the heat though, but rather due to voltage spikes because of a sub par hardware design. That's one big reason why there are not so many reliable controllers in >90v range because higher voltage requires much more careful approach in the design that pushes up the cost of development.
A six phase motor can be treated as a two motor setup. You can use a throttle input on one controller and command torque to the second controller via the CAN connection. The current/torque will be balanced. Of course, both controllers need to be programmed identically and the firmware handles that nicely out of the box pushing configuration to slave controllers from the master. There is also a traction control option for multi controller setups.
Regen is variable and works very well but one thing to remember is that it's not the controller but your battery that imposes hard limits on how much current you can feed back into it. Most li-ion chemistries can't take more than 0.5C of the charge current. Some allow supercharging at 1C or more but then you have to actively manage the quick temperature rise on the cells.
John in CR wrote: ↑Feb 05 2020 1:57am
I need 2 to drive my 6phase HubMonster powered MadAss that has a 31s pack with which I run a fresh off the charger max voltage of 128V. As long as torque throttle control is great, then I'd run each controller at 150A battery side 250-300A phase current. The motor is well ventilated, so it can handle at least that current. Some guys have run theirs much higher against my recommendations without nearly the cooling I have. I just haven't had controllers capable of more than that current. I'd push it higher temporarily if you want as long as I can see controller temp, because I'd rather run conservative than risk having to change out controllers more than the initial time, as it's pretty involved on this bike.
BTW, I tried to recover my password but have yet to get the email to reset, and the site won't let me proceed with the preorder of 2 controllers without logging in since it recognized my email address JohnCFfirstname.lastname@example.org . You should be able to look me up with that portion of my email since I'm a long-time customer.
If you want me to truly limit test one, I do have a very low inductance v1 speed wind 50mm wide QS273 that's vented and I've pushed it at over 400 battery side amps. I couldn't run it continuously with a 31s pack due to high iron losses, but I could do some short speed bursts. I've never blown a controller at speed anyway, so the real test would be high current and high voltage at partial throttle attacking a mountain road, and I've got a kilometers long 20% continuous grade road that leads to a wind farm on top of the mountain perfect for limit testing anything by accelerating hard out of the switchbacks. The regen better not go out on me, because the scary part is coming back down with mechanical brakes.