Motor Drive Technology Comparison

Compare and get a better understanding of features with the Motor Drive Technology Comparison. For any further questions or inquiries contact us!

2SMDC/PWMBLDC/SSVMTQM
VelocityThe velocity depends on the
switching frequency. Typically, 20 to 30 revolutions/second
Proportional to the voltage, higher as with 2SM. Higher velocities with ActiveDrive. Typically, 50 revolutions/second (limited by drive screw and noise)Proportional to the voltage, higher as with DC. Typically, 60 revolutions/second (limited by drive screw)High velocity stability
Smooth runningPossibly vibrations at high velocity, smooth running through mechanical damper and sinusoidal commutationQuieter than 2SMSinusoidal commutation for very smooth running (typical in ACS controllers, PI C- 891 controller, and SMC Hydra)
Resolution / PrecisionPosition information without encoder, high position stability, very high resolution in microstepping modeRequires encoder for positioning information, resolution depends on the encoder, position jitter caused by the control loop
TorqueLow torque in microstepping mode, high torque at low speedsProportional to the currentHigh, determined by the number of pole pairs
Self-lockingHigh holding force, self-locking only at a full-step (load- dependent)Low, can only be increased by drive gear and precision drive screwN/A
LifetimeHigher than DC, comparable to BLDC/SSVMLimited by brushes, typically 1,000-5,000 hoursLimited by bearings, typically several 10,000 hours, comparable with magnetic linear motors
MiscellaneousLess expensive than DC, long lifetime, reliable, position error at step lossLess expensive than BLDC/SSVM, lower control effort required, high dynamics and smooth running, low heat build-upLow maintenance, efficient and low noise, light, high reliability and dynamics, low heat build-up and few vibrations, suitable for industrial applicationsDirect drive, high drive rigidity, high repeatability, high torques, play-free, hollow shaft, flat, suitable for industrial applications

* This Motor Drive Technology Comparison page is a rendition from our Supplier, Physik Insturmente GmbH, White Paper Rotating Electric Motors for Precision Positioning.