bearing said:
I still don't think that you should rule out a motor because of low inductance.
Of course you should not rule it out from "motors", however this gives you a better understanding of your options. If that motor is very light and cheap - great, but if you need 5x more expensive and 3x heavy controller for it - maybe not so great. May be desirable for some specific applications, but certainly not for most of them.
bearing said:
Secondly, as I argued in another thread a long time ago, you need lower inductance to make more power. Simply a mathematical fact. I'm not the only one of that opinion; brushed DC motors were constantly developed towards lower inductance. One of the best brushed motor design is the Agni, and it has a low inductance. They need less advance at high speed/torque.
How low is Agni? Dealt with it many times, but did not measure inductance..
Low inductance is important in brushed high speed motors, because you can't adjust the angle of the brushes, it is fixed. So yes, at high RPM you start getting problems, such as power loss of arcing. Same goes for PMAC (BLDC) motors with cheap controllers (trapezoidal communication), where phases are being generated blindly, relying only on hall signals. With higher end controllers, which are based on SVPWM and FOC algorithms, that is not a problem.
bearing said:
As you say, the problem is that some (many) controllers doesn't work with all sorts of motors. But the technology to run these motors exists.
Yes it does. But at what cost? I've seen some techniques in theory, read some patents on driving low inductance motors... But have not seen a viable real-world solution. By real-world I mean solution that not only is working well, but also is technically and economically viable.
BTW could you list some controllers that are suitable to drive motors at 100V with inductance less than 5μH? I'm just curious and hope that these are actually possible to buy. and 5μH is quite generous, as those coreless motors, I guess, can't even reach 1μH.
bearing said:
You seem to be running a campaign against low inductance motors. In my opinion, it is very bad engineering to rule out new technology simply because one of their properties makes them hard to use. It's like sticking to cast iron pistons because the aluminum ones melt.
I'm "running campaign against low induction" because I've dealt with them numerous times and had a very hard time. I'd sit silent if I did not see endless discussions on the forums about various motors and problems running them. Many of members have no idea why are they having those problems in the first place. So I feel like I need to spread the word: beware, these motors are clearly not for you, if you don't know what inductance does and how to cope with it.
Few years passed and people are still discussing about running large RC motors, such as CA80100, CA120, etc... I've said it many time: these have low inductance and are really hard on controller. But many have no idea what inductance is and simply ignore it, focusing on things they understand.
Continuous power would be waaaaaaay higher. WhyTF wouldn't they want to show-off the highest performance setup specs as well? 
-to be honest it was stupid to risk it, running a motor over double the size, AND double the phase current was just asking for trouble.. but it lives on.