Application Guide For High-Performance Brushless Servo Systems

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Application guidelines for sinusoidal brushless servomotors and drive amplifiers

The trapezoidal or square wave current brushless servo is characterized the same as a brush-type servo drive and is generally well understood . The principles of sizing the sinusoidal brushless servo drive are similar, but there are some differences which merit review . Therefore, this section provides the guidelines for applying and sizing a servo drive using the sinusoidal brushless servo drive as an example. The basic structure of the servo system to be sized is illustrated in Figure 1.

Many laborious calculations are made in the typical sizing process. Calculations include reflected load inertias, RMS and peak torques, average and peak currents, RMS maximum speeds, and so on