Dc servo motor and ac servo motor comparison of advantages and disadvantages
(1), the advantages and disadvantages of the dc servo motor
advantages: speed control precision, the torque speed characteristic is very hard, control principle is simple, good linear adjustment feature, fast response time,
easy to use, cheap.
faults: brush commutation, speed limits, inside the rotor brushless motor, additional resistance, wear particles generated (Clean and explosive environment is unfavorable)
（2), ac servo motor, the advantages and disadvantages of
advantages: good speed control features, in the whole speed range can achieve smooth control, almost no oscillation, more than 90% of the high efficiency, less heat, high speed control, high accuracy position control (Depending on the encoder accuracy), stable operation, good controllability, rapid response, high sensitivity and the characteristics of mechanical properties and adjust the nonlinearity of indicators strictly, etc. Rated operating area, which can realize constant torque, moment of inertia is low, low noise, no brush wear, dongguan micro brushless dc motor, free maintenance,Apply to clean, explosive environment)
faults: control is relatively complex, need to adjust PID parameters on site and determine the drive parameters, need more attachment.
through the above comparison, we can realize the dc servo motor and ac servo motor, brushless motors have their respective advantages and disadvantages, we should dialectically treat both have their structure, features and applicable occasions.
