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Voltage on motor leads @ 0 throttle

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SimpleUnmanned
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Joined: 2019-04-05 21:53
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Voltage on motor leads @ 0 throttle

Hello!

I am using some VESC based controllers (from flipsky) on a prototype boat, which is equipped with submersible brushless motors.

I was rather shocked (pun intended) by power in the water from the motors when at zero throttle. I later measurd 12v on each motor lead again the battery's ground (Battery is around 29v) when there is no throttle.

Is this normal operation of brushless ESCs, VESC or is something odd happening? Or could this be a function of the break? I may have it enabled.

P.S. Turns out the metal hull was grounded with a panel mounted antenna adapter haha. Reaching down to cool off completed the circuit of fun.

Any input is greatly appreciated!