What does a motor current sensor do?
Sensors are a critical component in a motor control system. They are used to sense the current, position, speed and direction of the rotating motor.
What is a DC current sensor?
Any applications involving lower power (up to tens of Amps) use direct current sensing, in which a special precision sensing resistor is used to generate a voltage that is then measured. This method involves using a special precision sensing resistor to generate a voltage that is then measured (Ohm’s law).
How are current sensing pins used in DC motor?
This shield, based on a L298 H-bridge, provides two current sensing pins to the user, which can be used to measure the instantaneous current absorpion by each H-bridge. After some trials, Dustyn managed to have a quite clear picture of the absorption behavior of the DC motor: Sample code and updates can be found on Dustyn’s blog.
What are the two types of current sensors?
This project attempts to provide a brief review of the current sensing techniques underlying 2 common types of current sensors: the conventional DC current sensor and the hall-effect sensor.
How does current sensing work on an Arduino board?
On her blog, Dustyn Roberts presents her own experience on current sensing for controlling DC electric motors with an Arduino board and an Arduino Motor Shield. This shield, based on a L298 H-bridge, provides two current sensing pins to the user, which can be used to measure the instantaneous current absorpion by each H-bridge.
Which is an example of high side current sensing?
High-side current sensing is typically selected in applications where ground disturbance cannot be tolerated, and short circuit detection is required, such as motor monitoring and control, overcurrent protection and supervising circuits, automotive safety systems, and battery current monitoring.