Handbook For High-Performance Brushless Servo Systems

Comparison of DC servomotors and brushless servomotors
The traditional permanent magnet DC servomotor has been the industry workhorse for many decades in highperformance servo drive applications. The primary reason for this is that the DC servomotor is very easy to control using adjustable DC voltage. A brief review of the operating principle of the DC motor illustrates this point: See Figure 2.