Brushless Motor

Course outline
Very simply, there are two kinds of DC motors: brushed, with mechanical contacts, and brushless, which do not have contacts. Both have their roles, but that of brushless motors is much bigger and they are much more versatile. In brushless motors, an electronic circuit switches current, and it can be precisely controlled with a semiconductor. This contributes to a high level of efficiency that reduces energy consumption, and makes the motors suitable for a wide range of applications. This course introduces the basic knowledge needed understand the control of brushless motors, and also covers comparison with brushed DC motors.

Target reader
People who are interested in brushless motors.

Learning time for this course
1 hour approx.

Chapter 1 What is a Brushless Motor

1-1. History of Brushless Motors
1-2. Brushed DC Motors and Brushless Motors
1-3. Classification of Brushless Motors
1-4-1. What is a Brushless Motor (1)
1-4-2. What is a Brushless Motor (2)
1-5. Application Examples of Brushless Motors

Chapter 2 Driving Principle of a Brushless Motor

2-1-1. Driving Principle of a Motor (1)
2-1-2. Driving Principle of a Motor (2)
2-2. Brushed DC Motors and Brushless Motors
2-3. Sequence of a Brushed DC Motor
2-4. Sequence of a Brushless Motor
2-5. Relation Between a Pole, a Phase, and a Slot

Chapter 3 Technical Explanation of a Brushless Motor

3-1. Technical Explanation of a Brushless Motor
3-2. What is PWM?
3-3. What is an Inverter?
3-4. What is a Driver?
3-5. Position Detection by a Hall Sensor
3-6. Position Detection by an Induced Voltage
3-7. What is a Square-Wave Drive?
3-8. What is a Sine-Wave Drive?

Chapter 4 Let's Try to Rotate a Motor

4-1. Configuration of Square-Wave Drive
4-2. To Start with Square-Wave Drive
4-3. To Rotate by Square-Wave Drive
4-4. Configuration of Sine-Wave Drive
4-5. To Start with Sine-Wave Drive
4-6. To Rotate by Sine-Wave Drive
4-7. To Change Speed
4-8. Speed ​​Sequence
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