Samd
10 MW
Cowardlyduck said:Thanks for explaining Sam.
It's good to understand why and where these limits exist.
I wonder where the rate of diminishing returns really takes over?
Actually this is really easy to know thanks to Justin, and those who have paid to send him motors so that we can flog them to death and see what happens.
Science advances our lives and the engineering at hand is really well known, there is not really anything left to discover.
Here's an example close to home for your leafmotor - the 3540 is pretty close - just that the lams are 0.3mm thick not 0.5mm.
Yes you can feed a 3540 with it's 35mm wide stator 80v 80 amps. In the bottom right it will hold up for about 10 mins on the flat (depends on wheel size, fat rider etc).
See how the efficiency is 68 percent or less below 50kph? A bad move for squirting about on single trail with stops and starts, or being here on the goldfields. You get a motor that weighs 2kg less. And you add 4 or 6kg in batteries to close the efficiency gap.
See how the green efficiency curve absolutely tanks like a cliff over to the right? Welcome to saturation. You can cool that sucker with a thermonuclear fans, but the cold hard hand of science won't care.
There are plenty of other motors there to play with. There are some small amounts of error. And lots of variables.
Science is awesome!!