Product Description:

The LSM75-21-602-E2-0KA is a compact brushless servo motor supplied by Kollmorgen within the LSM Brushless Servo Motors series. It combines a permanent-magnet rotor with a three-phase stator. A matched drive can generate accurately controlled torque for positioning, indexing, and speed regulation in industrial automation.

Under continuous duty, the motor sustains 2.36 Nm of shaft torque without exceeding its rated temperature rise. When commanded, it can accelerate to 6000 rpm, a speed that keeps gear ratios low in high-throughput equipment. The electromagnetic relationship between current and output is established by the 0.42 Nm/A torque constant, giving the controller a direct scaling factor for current loops. Position feedback is provided by a 2000-line incremental encoder that yields 8,000 counts per revolution after quadrature decoding. An electrical design with 8 rotor poles sets the fundamental electrical frequency and helps lower torque ripple. A winding inductance of 17.9 mH and resistance of 2.26 Ω establish copper loss and influence drive filter selection, while the 230 VAC voltage class aligns the motor with standard servo amplifiers.

For short bursts, the magnetic circuit can deliver 8.8 Nm, allowing rapid indexing or overcoming static friction without oversizing the motor. Achieving that burst requires up to 21.6 A peak, a value that guides cable sizing and protective fuse selection. The lightweight rotor has only 0.000033 kg-m² of inertia, so commanded accelerations produce minimal lag and reduce settling time. Torque is transmitted through a shaft machined with a keyway, ensuring positive mechanical engagement with pulleys or couplings. With a back-EMF constant of 49 V/krpm, the drive must supply sufficient bus voltage to maintain dynamic margin. The overall assembly weighs 3.1 kg, which keeps moving mass low on gantry axes.