Apparatus for regulating the power consumption of a vacuum cleaner
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United States of America Patent
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Sep 10, 1996
Grant Date -
N/A
app pub date -
Aug 11, 1994
filing date -
Aug 12, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an apparatus for regulating the power consumption of a vacuum cleaner, it is proposed to detect the pulsating alternating current present at the driving electric motor and delivered by a phase-angle circuit by means of a parallel voltage sensor, rectify it, smooth it, digitize it, and, on the basis of data stored in tabular form from a memory arranged in a microprocessor, convert it into a true effective value of the motor voltage; and subsequently to compare it with various associated respective manually defined power data and to activate the phase-angle circuit so that irrespective of fluctuations or different power system alternating voltages or frequencies, motor output is regulated to constant values corresponding to the manual setting.
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