PacDrive 3 Lexium SH3 Motors

Lexium SH3 servo motors are an excellent solution to the need for dynamic performance, covering a continuous stall torque range from 0.2 to 33.4 Nm (0.2 to 24.6 lbf ft) for speeds up to 9,000 rpm. Thanks to their new winding technology based on salient poles, Lexium SH3 servo motors are far more compact and offer a higher power density than conventional servo motors. Lexium SH3 servo motors are UL Recognised and conform to UL1004 as well as European directives (marking).
They are available with the following variants:

6 flange sizes: 40, 55, 70, 100, 140 and 205 mm (1.57, 2.28, 2.76, 3.94, 5.51, and 8.071 in.)
2 degrees of protection for the shaft end:
- IP 54 or IP 65 in accordance with IEC/EN 60529
- The degree of protection provided by the casing is IP 65 (IP 67 with the conformity kit, which is available as an option).
With or without holding brake
Straight or elbow connectors for power and encoder connection
Integrated single-turn or multi-turn SinCos Hiperface® encoder (medium or high resolution)
Smooth or keyed shaft end

Special features

Lexium SH3 servo motors have been developed to comply with the following main specifications:

The ambient operating temperature is – 20…+ 40 °C / – 4…+ 104 °F without derating, in accordance with IEC 60721-3-3, category 3K3, and up to 55 °C / 131 °F with derating of 1% of the nominal output power per additional °C above 40 °C / 104 °F.
The maximum operating altitude is 1,000 m / 3,280 ft without derating, 2,000 m / 6,561 ft with k = 0.86, and 3,000 m / 9,842 ft with k = 0.8 (1).
The relative humidity that the servo motor can withstand is in line with IEC 60721-3-3, categories 3K3, 3Z12, and 3Z2.
The windings are insulation class F (maximum temperature for windings 155 °C / 311 °F, in accordance with IEC 60034-1.
All mounting positions are permitted (horizontal mounting (IMB5) or vertical mounting (IMV1 with shaft end at the top and IMV3 with shaft end at the bottom) in accordance with IEC 60034-7.

Holding brake
Lexium SH3 servo motors can be equipped with an electromagnetic holding brake.

Integrated encoder
Lexium SH3 servo motors are equipped with a single-turn (131,072 points/turn) (2) or multi-turn (131,072 points/turn x 4,096 turns) (1) SinCos Hiperface® high-resolution absolute encoder, giving an angular shaft position that is precise to less than ± 1.3 arc minutes.
This encoder performs the following functions:

Gives the absolute position of the motor to allow flow synchronization
Measures the servo motor speed via the associated Lexium 52 / 62 servo drive (this information is used by the servo drive’s speed controller)
Measures the position information for the servo drive’s position controller
Sends data from the servo motor to the servo drive, which provides automatic identification of the motor when the servo drive starts

Lexium SH3 servo motors, with a 3-phase stator and a 6 to 10-pole rotor (depending on model) with Neodymium-Iron-Borium (NdFeB) magnets, consist of:

Casing with RAL 9005 opaque black paint protective coating
Threaded sealed male elbow connector for the power cable (3)
Threaded sealed male elbow connector for the control cable (encoder) (3)
4-point axial mounting flange
Smooth or keyed shaft end (depending on the model)