Lab 9

Stepper motor control 

ABSTRACT

Four sequential digital waveforms are used to control a permanent magnet stepper motor. The main objective of this laboratory session is to illustrate how pulse width modulation helps to implement the sequential operation.

In the first part  we provide an overview of two types of stepper motors, the hybrid and the permanent magnet, highlighting the clever designs to attain high precision angular position of its shaft.  

CONTENT

1.  Introduction

Advantages of stepper motors

Disadvantages of stepper motors

Types of Stepper Motors

2.  Components of a stepper motor

  2.1   The Stator

  2.2   The Rotor

          2.2.A  Stepper motor  with a permanent magnet rotor

          2.2.B  Variable-(magnetic) reluctance (VR) stepper motor

          2.2.C   Hybrid (HB) stepper motor

3.  The unipolar 5-wire 28BYJ-48 Stepper Motor with ULN2003 driver

4. Experimental procedure

  4.A Lightning LEDs in sequence

  4.B  Connecting the terminals to the stepper motor

  4.C   Alternative method to drive the stepper motor

  4D. Advanced driving of a 4 phase stepper motor.  Half Step Drive 

(Alternative to the program in Fig. 27)

References:

       https://www.youtube.com/watch?v=Ew6eVGnj7r0  Hybrid Stepper Motor - Operating Principle

   https://www.youtube.com/watch?v=VMwv4XFZ2L0&t=69s

   https://www.youtube.com/watch?v=eyqwLiowZiU

   https://www.youtube.com/watch?v=TWMai3oirnM

      https://www.youtube.com/watch?v=B86nqDRskVU Permanent Magnet Stepper Motor (28BYJ-48) 

   https://www.youtube.com/watch?v=SUziz1zupGk              Exploring stepper motor with an Arduino

   https://www.youtube.com/watch?v=SUziz1zupGk                  The 28BYJ-48 Stepper Motor 

    https://www.youtube.com/watch?v=15K9N1yVnhc                28BYJ-48 Stepper Motor Disassembly

              https://www.youtube.com/watch?v=k2pz-4nsXbc                 Inside the 28BYJ-48 Stepper Motor