help to understand the Grin motor simulator curve

[timmy66]

I'm having trouble following the curve, the one attached has default-ish values populated after simulation.

As you move toward faster speeds, eg. past 32.7kph as the vertical line indicates, the power (red) begins to decrease.

Why is that? It would seem to imply that going faster past this inflection point requires less power.

Thanks for help

 

[amberwolf]

Since yo uhave throttle at 100%, what it's showing you is that at that throttle value, that line is the max speed you'll get, and the same point on the other curves is the power/etc it takes to get you there.

After that point power falls off because of voltage/current/etc of the system you've chosen in the simulator.

Change the battery voltage or the controller current limit and you'll see different results with the same motor and other conditions.

CHange the throttle value and you'll see different resutls with all the same equipment.

below the simulator on that page is explanations of the stuff you see and interactions, etc.

 

[1N4001]

As you move toward faster speeds, eg. past 32.7kph as the vertical line indicates, the power (red) begins to decrease.

The motor produces a higher counter-voltage the faster it spins, which works against the battery voltage and reduces the possible power output. Either use a faster wind or higher battery voltage to counteract this.