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This question is related to my previous question. I want to drive a brushed DC motor using H-bridge. To power the motor two 18650 cells will be used in series. The issue is that I want to limit th...
#3: Post edited
by
Lorenzo Donati
·
2023-08-09T06:28:52Z (over 1 year ago)
Retagged.
#2: Post edited
by
Lorenzo Donati
·
2023-08-09T06:27:42Z (over 1 year ago)
#1: Initial revision
by
Stefan
·
2022-07-01T15:47:23Z (over 2 years ago)
Limiting current to DC brushed motor
This question is related to my previous [question](https://electrical.codidact.com/posts/286654). I want to drive a [brushed DC motor](https://asset.conrad.com/media10/add/160267/c1/-/en/001385115DS01/scheda-tecnica-1385115-motore-540er-reely-parte-di-ricambio-532114c.pdf) using H-bridge. To power the motor two 18650 cells will be used in series. The issue is that I want to limit the current to 10 A (to prolong the battery life span, lower power dissipation on MOSFETs, etc). Is there a way to limit the maximum discharge current of the 18650 cells to 10 A? Or is it better to utilize some sort of current sensing that would turn off the MOSFET drivers if the current exceeds 10 A. Or is there different/better/easier solution? Placing a sense resistor between the lower MOSFETs of the H-brigde and ground, with combination with [INA180](https://www.ti.com/lit/ds/symlink/ina180.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1656650556273&ref_url=https%253A%252F%252Fcz.mouser.com%252F), the MCU could turn the enable (OD) pin of the [MOSFET driver](https://www.mouser.com/datasheet/2/308/ADP3120A_D-2309800.pdf) down if the current exceeds 10 A. Is this a viable solution?