Rotary Servo Motors

Yaskawa was the first company to mass produce servomotors employing a segmented stator design. This process uses individually wound stator segments that are grouped together, press fit into the motor body, and impregnated with resin. The result is improved heat transfer, dramatic reduction in motor size and cost, and the best quality and reliability available. Yaskawa has leveraged this technology to become the largest servomotor manufacturer in the world and produced the 4,000,000th AC servomotor in 2004.

The Sigma II family of servomotors has taken the next technological step using high-resolution serial encoder feedback. Position information is transmitted to the amplifier allowing full error checking which eliminates position error caused by electrical noise and prevents runaway conditions. This all-digital feedback design enables the amplifier to automatically recognize the motor and optimize settings.

The SGMAH servomotor series has a low-inertia design for extremely fast accelerations and short settling times. There are five frame sizes including NEMA 23 and NEMA 34 flanges providing up to 1,010 oz-in of peak torque. 100 and 200 volt windings are available with rated speeds of 3,000 rpm and maximum speeds of 5,000 rpm. An 8,192 ppr incremental serial encoder is standard. The SGMAH is rated IP55 (not including the shaft). Options include a 65,536 ppr absolute encoder, NEMA flange, shaft seal, and holding brake.

The SGMPH servomotor series has a medium inertia design with a flat profile providing the highest torque-per-length ratio available. These servomotors are well suited for applications requiring optimized load matching. There are five frame sizes providing up to 2,027 oz-in of peak torque. 100 and 200 volt windings are available with rated speeds of 3,000 rpm and maximum speeds of 5,000 rpm. An 8,192 ppr incremental serial encoder is standard. The SGMPH is rated IP67 (not including the shaft) providing resistance to moisture. Options include a 65,536 ppr absolute encoder, gearmotor, shaft seal, and holding brake.

The SGMGH servomotor series has a medium inertia rotor and incorporates the segmented stator design, which dramatically reduces overall size. These servomotors are well suited for applications requiring optimized load matching. There are 10 sizes from 500 watts to 15 kW providing up to 1,988 lb-in (224 Nm) of peak torque. 200 and 400 volt windings are available with rated speeds of 1,500 rpm and maximum speeds of 3,000 rpm (up to 7.5 kW). A 131,072 ppr incremental serial encoder is standard. The low base speed, medium inertia rotor, and high-resolution encoder allow many applications to be solved without a gearbox. The SGMGH is rated IP67 (not including the shaft) providing resistance to moisture. Options include a 131,072 ppr absolute encoder, gearmotor, shaft seal, and holding brake.

The SGMSH servomotor series has a high torque-to-inertia ratio and incorporates the segmented stator design, which dramatically reduces overall size. These servomotors are well-suited for high cycle-rate applications. There are 6 sizes from 1kW to 5kW providing up to 422 lb-in (48 Nm) of peak torque. 200 and 400 volt windings are available with rated speeds of 3,000 rpm and maximum speeds of 5,000 rpm. A 131,072 ppr incremental serial encoder is standard. The SGMSH is rated IP67 (not including the shaft) providing resistance to moisture. Options include a 131,072 ppr absolute encoder, shaft seal, and holding brake.

The SGMUH servomotor series has a high torque-to-inertia ratio for high cycle-rate applications. The SGMUH incorporates the segmented stator design, which dramatically reduces overall size. 400 volt windings are available with maximum speeds of 6,000 rpm. A 131,072 ppr incremental serial encoder is standard. The SGMUH is rated IP67 (not including the shaft) providing resistance to moisture.

The SGMBH servomotor series has an internal permanent magnet (IPM) design which reduces rotor inertia. These servomotors are well suited for highly dynamic, high power applications such as hydraulic system replacement.. There are 5 sizes from 22 kW to 55 kW providing up to 6,120 lb-in (700 Nm) of peak torque. 400 volt windings are available with rated speeds of 1,500 rpm and maximum speeds of 2,000 rpm. A 131,072 ppr incremental serial encoder is standard. Options include a 131,072 ppr absolute encoder, shaft seal, and holding brake.

Product Documents

Sample Brochure

Download Reader