very probably, grins if you start the calculations for a reactive load things become a whole lot more complex.

That's why I used the ohms law example since for my logic to hold we have to view the motor as a stalled and thus passive load.

if, as seems to be true, the higher the loading on a brushless motor the higher the current then in a stalled condition "I" should tend towards infinity.

I figure this is one occasion where we both have had way more tuition than is good for us. laughs

HI Haverlock.
I believe we agree that a high current would pass.
I referred to the possible current based on the wattage of the motor so was not using ohms law, which is more suitable for passive calculations. .

Unfortunately your reasoning is in error. e/r=I

if at 12 volts you pass 10 Amps if r were to remain constant then at 6 volts you would pass only 5 amps.

I do not know the characteristics of a brushless motor so I am loath to use the same logic I would on a brushed setup.

on a brushed motor if stalled the only resistance is that of the windings which is low so a high current will pass.

if a brushless motor exhibits the same characteristics then a potentially stalled motor would indeed try to pass current tending towards infinity.

So if the voltage supplied was to low to make the motor turn then it is effectively stalled and a VERY high current can flow.

This is independent of supplied voltage. Replace r with 0 and I= infinity

Interesting. I'm guessing you are using LiPo batteries and as you are aware they should not be discharged below the manufacturer's minimum voltage. Some of my higher powered LiPos suggest a 3.5v cut off but you set the actual value in your ESC.
A little math shows that the power (watts) of your motor is the product of the voltage applied and the current flowing so for a 120 watt motor at 12v the amps are 10. if the voltage drops to 6v the amps could then be 20.
Haverlock has identified this as a likeley scenario and I would agree.
Ideally your ESC should exhibit decreased performance before switching off the power transistors to protect your batteries, this then allowing you to run at minimal speed back to shore.
The 120 amp Aquastar may offer advance protection but you would need to read the manual. All my ESCs stay dead if the battery drops below the set cut off and will not rearm until the battery is disconnected.
I appreciate that you were advised that the ESC would rework after a minute but this is putting you, your model and your LiPos at risk.
Unlike other battery technologies, LiPos chemical structure can change if the voltage parameters are exceeded. Once changed the position is irreversible and you will lose capacity and in the worst case there could be an explosion and fire.
Dave

No its a brushless motor.
I cant think where the current is going if the motor isn't using it.
Les

I am guessing you have brushed motor(s).

in which case you could have had the situation where you were effectively supplying current at to low a voltage to stopped motor(s) so you would have effectively stalled conditions so current will tend towards infinity.

May seem far fetched but its the only thing I can think of!!