Servo Motors/Amplifiers offer speeds to 6,000 rpm.

Press Release Summary:



Sigma II Series AC servo products come in 240 and 480 Vac for applications requirements up to 15 kW. There are 32 combinations of motors and amplifiers ranging from 13.5 oz-in. rated torque to 1550 lb-in. peak torque. Servo drives feature velocity loop bandwidth of 400 Hz abd 16- or 17-bit serial encoder. Servo amplifier reads servo motor ID, indicating type and capacity, and automatically sets parameters. Sigma II Series conforms to CE, UL, and cUL standards.



Original Press Release:


Yaskawa Expands The Sigma II Series for Larger Loads


The World's Highest Performance Class

Waukegan, IL -- Yaskawa Electric America, Inc. is pleased to announce the expansion of the Sigma II Series AC servo product line in both 240 and 480VAC series for application requirements up to 15kW. This product line utilizes the latest advances
in semiconductor and power electronics for faster and more accurate motion control in front-end and back-end fabrication processes.

There are 32 combinations of motors and amplifiers ranging from 13.5 oz-in of rated torque to 1550 in-lb of peak torque and motor speeds as high as 6,000rpm. The amplifiers are designed to minimize the use of precious control panel space and continue to operate at rated torques in cabinet ambient temperatures as high as 55°C without overload.

The Sigma II Series can be applied to a wide variety of applications, including but not limited to CMP, cleaning CVD, PVD, chip mounting, wafer handling robots, or automated test and assembly. Its open control interfaces also provide for simple
integration with stepper indexers, PC-based controls, motion controls, and PLCs, including add-on DeviceNet application modules.

Features of the Sigma II Series AC servo drives include: high response, velocity loop bandwidth of 400Hz; high-resolution serial encoder (16 or 17 bits standard); a maximum rotation speed of 5,000rpm on the SGMAH, SGMPH and SGMSH types; 6,000rpm on SGMUH type; settling time that is reduced to one-third of conventional models; and smooth operation at low speed (due to reduced motor speed ripple). Yaskawa's new technologies, such as speed observer control, are integrated into the Sigma II Series to achieve higher performance.

The Sigma II servos are easy to install and operate. Auto tuning allows for fast setup of the new drives, while adaptive tuning actually adjusts parameters while the machine operates. The servo amplifier reads the servo motor ID, indicating type and
capacity, and automatically sets parameters. There is also increased flexibility for expanded variations and functions. Torque, speed or position control can be digitally selected simply by changing a parameter.

For improved ease of maintenance, the main circuit and control circuit power supplies have been separated. Terminals for external regenerative resistors are provided. The Sigma II Series conforms to CE, UL, and cUL standards and has enhanced
environmental protection. The SGMAH has an IP55 protective enclosure, and the SGMAH and SGMPH have improved vibration resistance. DC reactor connection terminals are equipped as standard for power supply high harmonic countermeasures.

Yaskawa, with headquarters in Waukegan, Illinois, is a leading manufacturer of high-performance variable speed AC drives, servos, CNCs, machine controllers, and robots. The company's technological leadership and quality performance record spans
its 86-year history. Yaskawa is a recipient of ISO 9000 and holds international quality excellence awards, including the prestigious Deming Application Prize.

For more information on the Sigma II Series, contact Yaskawa Electric America, Inc., 2121 Norman Drive South, Waukegan, Illinois 60085, telephone 1-800-YASKAWA or fax 847/887-7310. You can also visit our Web site at www.yaskawa.com.

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