Motor｜Basic
3-phase AC ＜How Does a Motor Work? (2)＞
Actual Motor Operation
Here we see an actual method used for rotating a motor by generating a rotational magnetic field from a 3-phase AC source and conductive coils (3-phase AC is an AC signal with phases shifted 120°).
- The synthetic magnetic field in ① above is shown in ① below
- The synthetic magnetic field in ② above is shown in ② below
- The synthetic magnetic field in ③ above is shown in ③ below
As mentioned above, the 3 phase coils (U, V, and W) are wrapped around an iron core, positioned 120° apart, with the higher voltage generated at the North pole(N) and the lower voltage at the South pole(S). Since each phase varies sinusoidally, the pole (N/S) generated from each coil will continue to change, along with the magnetic field.
If we look at just the North pole phase, it switches in order from the U coil → V coil → W coil → U coil, enabling rotation.
【Download Documents】 Overview of Motors and Motor Driving
This hand book provides an overview of motor fundamentals and motor driving. In addition to explaining the types and structures of motors, it provides an overview of motor drive systems in various fields.
Motor
Basic
-
Brushed DC Motor
- Construction of Brushed Motors
- Principle of Rotation
- Power Generation Principle
- Short Braking
- Characteristics of Brushed DC Motors
- Driving Brushed DC Motors with an H-Bridge:Principles
- Driving Brushed DC Motors with an H-Bridge:Switching Output States
- Driving Brushed DC Motors with an H-Bridge:High-Side Voltage Linear Control
- Driving of Brushed DC Motors Using BTL Amplifier Circuits: Linear Voltage Driving
- Driving of Brushed DC Motors Using BTL Amplifier Circuits: Linear Current Driving
- Driving Brushed DC Motors Using PWM Output: Principles of PWM Driving
- Driving Brushed DC Motors Using PWM Output: Current Regeneration Methods in PWM Driving
- Driving Brushed DC Motors Using PWM Output: Losses and Points to be Noted
- Driving Brushed DC Motors Using PWM Output: PWM Driving with an H-Bridge Circuit
- Driving Brushed DC Motors Using PWM Output: H Bridge Constant-Current Driving
- Driving Brushed DC Motors Using PWM Output: Driving in the Form of BTL Amplifier Input
- Single-Switch Circuit Driving and Half-Bridge Circuit Driving
- Driving Circuits for Brushed DC Motors – Summary
-
Stepping Motors
- Structure of Stepping Motors
- Basic Operating Principles of Stepping Motors
- Stepping Motors: Microstep Operation Principles
- Basic Characteristics of Stepping Motors
- Structure and Operating Principles of Hybrid Type Stepping Motors
- Stepping Motor Driving: Bipolar Connections and Unipolar Connections
- Driving 2-Phase Bipolar Stepping Motors: Part 1
- Driving 2-Phase Bipolar Stepping Motors: Part 2
- Driving 2-Phase Unipolar Stepping Motors
- Stepping Motors – Summary
-
3-Phase Brushless Motors
- Structure of 3-Phase Full-Wave Brushless Motors
- Principles of Rotation of 3-Phase Full-Wave Brushless Motors
- Position Detection in 3-Phase Full-Wave Brushless Motors
- Driving 3-Phase Full-Wave Brushless Motors: 120° Commutation Linear-Current Driving with Sensors
- Driving 3-Phase Full-Wave Brushless Motors: Sinusoidal Commutation PWM Driving with Sensors
- Driving 3-Phase Full-Wave Brushless Motors: Advance Angle Control
- Driving 3-Phase Full-Wave Brushless Motors: Maximization of Motor-Applied Voltage
- Driving 3-Phase Full-Wave Brushless Motors: Sensorless 120° Commutation Driving
- Methods of Sensorless 120° Commutation Driving Startup 1: Startup on Detection of Induced Voltage from Synchronous Operation
- Methods of Sensorless 120° Commutation Driving Startup 2: Startup on Detection of Permanent Magnet Stopped Position
- Features and Applications of 3-Phase Full-Wave Brushless Motors ーSummaryー
- What is a Motor?