Motor Control System Overview — Lesson 1

This lesson covers the introduction to motor control using the Ansys SCADE® embedded software product collection, particularly focusing on a sensorless control approach for managing a motor's speed and load without traditional physical sensors. This lesson demonstrates a system that utilizes the back electromotive force (EMF) voltage as a feedback mechanism for the motor's speed control. The first lesson of this course offers an overall system overview, discussing key components like the microcontroller, the architecture, speed detection, and control methods. The system's challenges and limitations are also explored, such as the inability to use 100% PWM due to the need for break periods to measure back EMF. An example used in the lesson is the motor's connection to a microcontroller that controls it via a PWM signal, and the feedback loop is completed by measuring the back EMF voltage, thus avoiding the use of a physical speed sensor. 

Lecture

Alternate video link.

Video Highlights

00:17 - Introduction

00:50 - Lesson Overview

02:10 - Speed Detection and Control Approach

07:43 - Ansys SCADE Software system and its Architecture

09:52 - System Control Loop

10:36 - Target Microchip

13:13 - Motor Driving and Speed Measurement Principle

15:35 - Pros and Cons of Sensorless Control