Patent ID: 8607402

Claim:
A vacuum cleaner comprising: a drive unit having a maximum input power; a drive unit operating device configured to operate the drive unit below the maximum input power, the drive unit operating device including a regulating unit configured to regulate an actual input power of the drive unit within a first operating range in which an input power is above a predefinable upper limit, the regulating unit being operable to: detect a controlled variable including at least one of the actual input power and a measure of the actual input power, compare the actual input power to a reference variable including at least one of the predefinable upper limit and a measure of the predefinable upper limit, and influence the actual input power of the drive unit so as to conform the actual input power of the drive unit to the reference variable, wherein the regulating unit is configured to detect the controlled variable based on a motor current and a motor voltage supplied to the drive unit, and wherein a convertor is configured to convert detected electric variables forming the basis of the controlled variable into extra-low voltages, and wherein the regulating unit is configured to process the extra-low voltages.