From 15338a6c65e2b969558efba1c7ed811eb5bea233 Mon Sep 17 00:00:00 2001 From: Lucien Renaud Date: Sun, 15 Jan 2023 19:52:34 +0100 Subject: [PATCH] Update readme: correcting ratiometric to absolute sensor The sensors are NOT ratiometric they are absolute --- README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 4486a18..869fb77 100644 --- a/README.md +++ b/README.md @@ -29,11 +29,11 @@ Connected directly to a MCU (here a STM32 Nucleo F401RE) and with the Simple FOC ## Position estimation with the integrated linear hall sensors ### 1. Setup -Each motor is composed of two ratiometric linear hall sensors. (Texas Instrument DRV5053 Analog-Bipolar Hall Effect Sensor) They are placed at around 120º from each other (eyes measured) and measure the magnetic field of the rotor. +Each motor is composed of two absolute linear hall sensors. (Texas Instrument DRV5053 Analog-Bipolar Hall Effect Sensor) They are placed at around 120º from each other (eyes measured) and measure the magnetic field of the rotor. -Ratiometric means that the output signal is proportional to the voltage supply to the sensor. In this setup, with 5V supply, the output measured is between 520mV and 1.5V, so a 1V amplitude signal. +Those sensor are absolute, meaning that the output of the measured magnetic field is the same regardless of the power suplly. In this setup, with 5V supply, the output measured is between 520mV and 1.5V, so a 1V amplitude signal. ### 2. Measures