SimpleFOC Coasting?

developement
1

Hi there, I’m working on a board based on the DRV8323RS, supposed to run a BLDC motor at about 48v nominal and 15A. This is for a light EV, similar to the one that @Valentine posted about a year ago. I was wondering if SimpleFOC has any provisions for coasting and the like?

I’ve read through the Regenerative Braking thread that was posted here, and I saw a potential solution in completely turning off the control and letting the MOSFETs into Hi-Z. Would it be a problem if a loop was made to have the MCU send a signal to the DRV to put the MOSFETs in Hi-Z, and then if the input isn’t 0, SimpleFOC kicks in? I’m using hall effect sensors for positioning.

Thank you!

2

Hi,

0 torque target in foc_current mode is not enough coasting for you ?

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3

Upon further reading, yes that is quite enough :grinning:

I even read that in the original thread, but it slipped my mind :frowning: Thank you for the quick reply! and apologies for the question

4

No worries.
Maybe Valentine can confirm if that’s what he was doing, or if he was disabling the driver for saving even more energy.

5

It’s been a while, but iirc if you put them in high-z you should be able to coast.

Valentine

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