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correct sensor affirmation: not ratiometric

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Lucien RENAUD 2022-10-07 14:10:20 +02:00
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@ -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 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.
<img src="docs/Hallmotor.jpg" height=300>
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.
They are linear sensor, the output voltage correspond to a magnetic fields, regardless of the voltage supplied. In our case the output signal is between 1V and 1.65V.
### 2. Measures