Kin wrote:So, when brushed motors do that, I imagine it's because the controller is shorting through or something like that, and a brushed motor with applied voltage just spins.
The common failure is throttle... if it fails it usually fails WOT.
A pullcord on the mains is a good idea.
Why would the throttle to a brushed motor fail any more often than the throttle to a brushless motor? We're talking about failure in brushed vehicles, not failure in brushless, which I guess one of the only and therefore by nature most common power-driving failures of a brushless would be a throttle failure. But thats because any other failure of the controller would not switch the phases well and the motor would lock up and we wouldn't count it as a power-driving failure.
But you also always have very informative answers, so I am not asking this to disagree while assuming I'm right, I'm asking it as a question while presenting my rationale for questioning.
Pullcord on the mains is always a good idea, I agree. Especially if as Tyler said the throttle fails, then the whole "oh the fuse will blow" business is not as all correct. Pullcord is also better than assuming a fuse will blow.
My idea for "Oh if it's just a short through the controller then the fuse will blow" was very amateur. Because if you're up to speed then directly putting power to the motor will not pull much current at all. So entirely disregard it, you still need a kill-switch/pullcord.
New to endless-sphere? Notice a lot of signatures recommending Ebike.ca? That's because it's the best place for a quality and manageable, (but still 'real'), first build. Justin is a solid supporter of electric bike development, and a good source of equipment.
My hat off a thousand times to the green people that effectively run this forum. The ES Mods are superb.