Using ODrive with 3S Li-Ion battery (minimum supply voltage limit)

#1

Hi everyone,

I was wondering if anybody has tried using the ODrive with a 3S Li-Ion battery pack?
Is there any risk of damage or malfunction operating the ODrive below 12V?

The official documentation says the power supply voltage should be between 12V and 24V (or 48V depending on the version). But the usable voltage range on a 3S battery would be from 12.6 V to 9V.

After having a quick look in the datasheet, the mosfet driver seems to be the limiting factor for low voltage operation. According to the datasheet, the DRV8301 can operate down to 6V. Is there something else that limits the supply voltage on the lower end?

I am aware that the performance of motors will degrade with lower supply voltage, but I think this should be fine for my application as I only need small torque in combination with very low speeds.

Cheers,
Daniel

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#2

Hi Daniel,

The ODrive will error out if the DC voltage goes under 8V even for an instant. So keeping it a bit above that, say 10V, is recommended.

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