AC servo motor

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AC servo motor

Similarly, a motor that operates with a DC power source is called a DC motor, and is called an AC motor that operates with these AC power sources.

AC servo motors are classified as induction motors and motors called brushless DC motors.

Why is an AC motor called a brushless DC motor? This is because alternating voltages that change over time are applied to the coils of a rotating brushless DC motor.

The name comes from the principle of brushless DC motor rotation, ie it has no DC motor brush. On the other hand, the name AC motor comes from the type of driving force.

There are two ways to operate brushless motors: square wave drive or sine wave drive. There are other approaches that have been recently adopted. This approach seeks to enhance exercise performance using sinusoidal and trapezoidal waveforms.

Some companies claim that a sine wave alone needs to be defined as an AC waveform, while others include the need for square and trapezoidal waves. There is no unified view of this.

In the current situation, you may well think of “not a brushed DC motor” as an AC servo motor.