Apparatus for regulating the power consumption of a vacuum cleaner

US5554917A · kind A · utility

Assignee

• Gerhard Kurz · DE

Inventors

• Gerhard Kurz · Calw, DE
• Manfred Kraft · Neubulach, DE

Key dates

• Filing date: Aug 11, 1994
• Grant date: Sep 10, 1996
• Expiry date: Aug 11, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B40/00
• WIPO field: Furniture, games
• WIPO sector: Other fields

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.