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Decentralised low-power variable speed drives

24 April 2020

WEG has added a new model to the MW500 series of variable speed drives (VSDs). Designed for decentralised installation, the MW500 VSDs are now available for operating induction motors with low power in the range of 370 to 550W.

The MW500 supports both voltage vector control (VVW) and V/f characteristic curve control and offers a robust and durable solution. The VSD can handle an overload of 150 per cent for 60 seconds every ten minutes and can be deployed at ambient temperatures — up to 40°C wall mounting or 50°C for motor mounting.

A sturdy housing design with protection rating IP66 or NEMA 4X allows the VSDs to be mounted directly on the motor terminal box or on the wall using an adapter plate. This eliminates the need for a motor feed cable and switch cabinet, allowing users to install the MW500 close to the controlled motor, increasing deployment flexibility.

The standard version of the MW500 comes with a PID process controller and an integrated PLC with numerous programming functions. The device includes an EMC filter compliant with EN 61800-3. An analogue speed control potentiometer is also included in the drive to enable setting the speed of an induction motor without the need for a control panel if desired.

To ensure maximum flexibility, digital I/O and communication protocols such as CANopen, DeviceNet and Profibus DP are available for the MW500 as optional extension modules. The Windows-based SuperdriveG2 application software for programming, control and monitoring of the MW500 is available to customers on the WEG website as a free download.

“The compactness and flexibility of the decentralised MW500 VSDs allow users to install them exactly where they are needed”, explained Johannes Schwenger, head of product management low and medium voltage drive systems Europe at WEG.  “The new frame size extends our successful drive product line with a flexible and durable solution for low power levels.”

More information on the MW500 series can be found on the WEG website, along with a full range of the company’s VSDs. To discover out where to buy the MW500 series, please click here to find your local distributor.