March 22, 2019 | Daywey Chen
2019-03-22
When choosing a Servo motor there are a few specifications to select from


AC / DC – the type of current is used
This indicates the inherent ability to control the speed

AC DC Servo Motor

DC- The speed is directly proportional to the supplied voltage with a constant load

AC -  The speed is determined by the frequency of the applied voltage and the number of magnetic poles
AC can withstand higher current, more used more often in jobs where high repetition and high precision is required

Brushed / Brushless
brushed_or_brushless_DC_servo_motor

The DC motor can be generally categorized into brushed or brushless. DC can be commutated mechanically with brushes, or electronically without brushes

Brush motors are generally less expensive and simpler to operate. Brushless are generally more reliable, more efficient and less noisy

DC motors generally provides a very accurate and fast response to start or stop command signals

 AC Motors are generally brushless

Synchronous / Asynchronous