Electrical Projects Vacuum cleaners require more operator attention than most home appliances for proper and efficient performance, but are really no more complex mechanically or electrically than window fans. Suction is created by means of a centrifugal fan which expels a powerful stream of air from the rear portion of the cleaner. This creates an equally powerful influx of air through the cleaning attachment nozzle which sucks up dirt and dust particles from carpets or floors. The air stream passes through a filter which collects the dust particles without obstructing the air flow appreciably. But, as the collection bag fills the resistance to air flow increases and loads the motor (usually a high-speed universal type). Thus, it is important to empty the filter or change the collection bag when filled.

The tank-type cleaner has the greatest capacity of all cleaner types, and thus retains suction for the longest period. The tank-type cleaner uses an armature extended from the motor housing to drive the twin-fan assembly.

If the motor refuses to run, check the switch, line cord, field, armature segments, brush to armature, and all leads and connections for continuity. Then inspect the brushes for wear

or binding in the holder. Turn the armature by hand to verify that it is free.




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October 6, 2008