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!

2SM DC/PWM BLDC/SSVM TQM
Velocity The 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 running Possibly vibrations at high velocity, smooth running through mechanical damper and sinusoidal commutation Quieter than 2SM Sinusoidal commutation for very smooth running (typical in ACS controllers, PI C- 891 controller, and SMC Hydra)
Resolution / Precision Position information without encoder, high position stability, very high resolution in microstepping mode Requires encoder for positioning information, resolution depends on the encoder, position jitter caused by the control loop
Torque Low torque in microstepping mode, high torque at low speeds Proportional to the current High, determined by the number of pole pairs
Self-locking High holding force, self-locking only at a full-step (load- dependent) Low, can only be increased by drive gear and precision drive screw N/A
Lifetime Higher than DC, comparable to BLDC/SSVM Limited by brushes, typically 1,000-5,000 hours Limited by bearings, typically several 10,000 hours, comparable with magnetic linear motors
Miscellaneous Less expensive than DC, long lifetime, reliable, position error at step loss Less expensive than BLDC/SSVM, lower control effort required, high dynamics and smooth running, low heat build-up Low maintenance, efficient and low noise, light, high reliability and dynamics, low heat build-up and few vibrations, suitable for industrial applications Direct 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.

Contact us