Cyclonic dust collector with variable speed drive and constant load current
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United States of America Patent
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Jul 23, 2013
Grant Date -
Aug 25, 2011
app pub date -
Feb 17, 2011
filing date -
Feb 19, 2010
priority date (Note) -
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Abstract
A dust collection arrangement employs a variable frequency drive to supply AC to its fan motor. A current sensor measures the current drawn by the motor, and this is compared with a preset value. The variable frequency drive adjusts the frequency of the AC applied to the motor to maintain the motor current at the preset level. This keeps the flow of air in the system optimal as dust producing tools are added or taken off.
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