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Compact VSDs for low-power motors

13 April 2016

WEG recently introduced a compact range of variable speed drives (VSDs) to enhance energy efficiency low motor power applications.

Designed to drive motors with power from 180 W to 4 kW, the series is suited to use in relatively small machinery such as centrifugal and metering pumps, fans and ventilators, stirrers and mixers, extruders, roller conveyors, cutting machines and rotary filters.

The drives feature an integrated micro PLC and a control panel with LCD display. Plug-and-play extension modules have been added to simplify installation and the drive unit’s fan can be removed for maintenance.

Two slots have been included for extension modules – one for communication and the other for a variety of I/O modules which allows users to integrate RS485 or RS232 interfaces and use Modbus RTU, Bluetooth or USB communication protocols. The VSD can also be connected to fieldbus systems such as Profibus DP, CANopen or DeviceNet, or configured for operation under remote control. An Ethernet IP interface is also available.

Initially the drive will be available in frame size A for rated power from 180 W to 1.5 kW and frame size B for rated power from 2.2 to 4 kW. It will provide supply voltage flexibility with versions for single-phase and three-phase power. The single-phase version can also be powered directly from a DC supply connected to the DC link, in order to drive three-phase induction motors from a DC power source.


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