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Variable speed drives

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article image Suitable for transporting or compressing solids, liquids, or gases.

SIEMENS Automation and Drives has released SINAMICS G150 variable speed drive. Supplementing the Siemens Simovert Masterdrive control cabinet units, G150 units have been designed for variable speed drives in the manufacturing and process industries and have been specially tuned to the requirements of drives with quadratic or constant torque load characteristics with medium performance requirements.

Compared to a fixed speed drive, the converter saves up to 50% energy and requires up to 70% less space than conventional devices. The drives can be used for transporting or compressing bulk materials in solid, liquid, or gaseous form. Such applications include pumps and fans, compressors, extruders and mixers, mills, and conveyors

The G150 can be integrated into any Siemens automation landscape using a standard Profibus interface and various analogue and digital interfaces. It is a particularly quiet and compact variable speed drive that uses IGBT power semiconductors. The modular power blocks are easy to service and can be replaced as a complete unit if necessary.

Only a few parameters need to be set when commissioning. A high level of operating convenience is provided by the AOP30 operator panel with a menu-prompted, graphics based alphanumeric text display. The system uses ready-to-connect ac/ac converters in a standard control cabinet. Different designs permit the power supply and motor connections to be located at the top or the bottom of the cabinet unit. The units are available in widths from 400mm upwards in intervals of 200mm, in various degrees of protection up to IP154, and with two design versions.

They are available for an output range from 75kW to 800kW, in supply voltages from 380V-480V to 660V-690V.

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