Two units of the newly-developed WEG 11 kV VSD have been commissioned in West Africa by WEG Automation Africa, a member of the Zest WEG Group.
According to Kirk Moss, senior manager: projects and engineering at WEG Automation Africa, the new WEG MVW3000 VSD is a valuable addition to its medium voltage (MV) VSD portfolio. The first two 11 kV units produced are for 850 kW ventilation fan motors in an underground gold mine in Ghana.
“In line with WEG’s ongoing innovation, the addition of the WEG MVW3000 system brings a range of benefits to customers,” says Moss. “It gives WEG Automation Africa even greater flexibility in our market offering, further enhancing our capability to provide customised solutions.”
The design is based on the well-known cascaded H-bridge (CHB) topology, using multiple low voltage power cells in combination to achieve the desired voltage output. The input switch, phase-shifting transformer and VSD are fully integrated in a single MV panel.
“The WEG MVW3000 is particularly suited to applications where there are standard motors with no special insulation,” adds Moss, “or where existing motors are being modified for VSD control.”
This VSD delivers high quality input power using low harmonic multi-pulse transformers. Users benefit from an efficiency of over 96,5% throughout the entire load range, and a power factor of more than 0,95 throughout the entire speed range.
“The design includes power cells with long-life plastic capacitors, which are more reliable and last longer than dry type capacitors,” explains Moss. “They also have the advantage of not needing to be reformed after long periods of storage.”
In standard configuration, the 11 kV VSD is available from 40-400 A or 640-6500 kW, although larger sizes are also available if required.
Among the options on the WEG MVW3000 is an automatic cell bypass solution. This ensures minimal reduction in the output-rated torque so that normal operations can continue. Redundant power cells can also be added to the design to ensure that 100% torque can be maintained. Prior to delivery, all VSDs are fully load-tested in WEG’s state-of-the-art facility in Brazil.
Sealed split spherical roller bearings deliver rapid installation and reduced downtime SKF South Africa
Motion Control & Drives
SKF Cooper sealed split spherical roller bearings combine a split design with premium engineering to enable rapid installation and simplified maintenance, reducing mean time to repair by up to 70% and keeping operations running in sectors from mining to food and beverage.
Read more...Inclination sensors for motion control ifm - South Africa
Sensors & Transducers Motion Control & Drives
The JBC dynamic inclination sensor from ifm offers accurate angle measurement in the most demanding conditions, filtering out motion disturbances such as vibrations, shocks and vehicle dynamics to deliver reliable inclination values via IO-Link or programmable switch outputs.
Read more...Inside the Giant Magellan Telescope with mechanical engineering at astronomical scale
Motion Control & Drives
Construction of the Giant Magellan Telescope, set to become the world’s largest Gregorian optical infrared telescope, is well underway. While its scientific mission is to transform astronomy, its performance depends heavily on advanced mechanical, hydraulic and pneumatic engineering.
Read more...Drives cut energy use by up to 30% amid rising costs
Motion Control & Drives
Rockwell Automation’s PowerFlex 755TS variable frequency drives are delivering energy reductions of 10 to 30% in Africa’s industrial operations, with adaptive control and predictive maintenance features that cut downtime by up to 50%.
Read more...Proportionate specification for hazardous locations
Motion Control & Drives
As automation spreads deeper into processing, handling and transport operations, motors are increasingly required to operate in spaces that sit on the edge of hazardous zones.
Read more...Keep your turbines spinning
Motion Control & Drives
No turbine is immune from wear and tear. Unexpected downtime or poor performance can quickly degrade its value and lifespan, but strategically maintained turbines can deliver decades of performance.
Read more...Design life analysis keeps lifting equipment alive
Motion Control & Drives
The Konecranes Design Life Analysis has been specifically designed to calculate the remaining design life of structures and machineries of cranes and associated lifting components. It determines the amount of work it can safely perform before its useful life is over.
Read more...Compact powerhouses with versatile configurability Horne Technologies
Motion Control & Drives
Faulhaber is introducing several new additions to its range of DC micromotors. Designed for maximum reliability and flexibility, these drives open up new possibilities for modern, space-saving drive solutions.
Read more...Kollmorgen introduces new controller and high-voltage capability
Motion Control & Drives
Kollmorgen has expanded its Kollmorgen Essentials portfolio with the new PCMM2G Essentials controller and a high-voltage drive rated for up to 4 kW. These support a broader range of industrial applications and motion requirements.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version