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Energy efficient and compact servo drives

18 September 2017

A new range of AC servo drives, which are said to provide consistently simple and fast commissioning, maximum machine throughput and operational reliability, has been introduced by YASKAWA.

The compact Sigma-7 servos (200 V Series & 400 V Series) cover a power range from 50W up to 15kW in various formats, with the largest motors offering a continuous torque of 95Nm and a peak 224Nm. 

The drives were developed to meet the needs of today’s production engineering machine builders and end-users in packaging plants, semi-conductor manufacturing, digital printing and wood processing. Initially, the range is available just with embedded EtherCAT and Mechatrolink3 communications with further connectivity options set to follow. 

Features of the drive include quick set-up – just three minutes – due to pre-sets in the amplifier software to simplify commissioning, a ‘tuning less’ function enabling immediate use and an auto-tuning function to ensure quick adjustment. 

The motor is designed to operate with up to 20% less heat generated. Furthermore, the possibility of DC power coupling of axes offers the potential for sharing and energy savings of up to 30%

Sigma-7 includes a 24-bit absolute encoder that ensures a resolution of 16 million pulses per revolution for precise positioning. 

The drives meet all mandatory safety standards. For example, the STO function is implemented by default in all units so they comply with the requirements of SIL 3 and PL-e, while the safety functions SS1, SS2 and SLS can be integrated by using the safety module.  


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