Introduction
| Authors: Bogdan Mariniuc. Microchip Technology Inc. |
This application note describes how to drive a stepper motor. An electric motor is a machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding and generate a force in the form of torque applied on the motor's shaft.
A stepper motor is a DC motor that works in discrete steps. It is synchronous, brushless, and can accurately control position and speed by digitally controlling step points.
Stepper motors have several advantages:
- Precision: Stepper motors move in discrete steps, allowing for precise positioning and repeatability of movement
- High Torque at low speeds: Unlike other motors, stepper motors can deliver high torque at low speeds, making them ideal for applications that require precise speed and position control
- Open-Loop Control: Stepper motors can be controlled without a feedback sensor because they move in predictable steps
- Low-Cost: Stepper motors are generally less expensive than servo motors of the same power rating
- Simple to Use: Stepper motors are easier to use and program than other types of motors
- Reliable: Because of their simplicity, stepper motors are very reliable and have a long life span
This application note presents a controller with four demonstration application codes capable of controlling acceleration, deceleration, position, and speed.
