The pulp and paper industry has long used variable speed drives (VSDs) to achieve greater energy efficiency and precise motor control. However, some places within a mill present challenges for air-cooled VSDs.
In some cases, especially in older mills, dust regularly clogs the air intakes, or corrosive gas damages them. In others, the heat given off by the drive during operation is undesirable. Meanwhile, the larger footprint of an air-cooled VSD may be an issue for facilities with limited floor space.
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