Patent · US Active

Resonant motor unit and electric device with resonant motor unit

US8558430B2 · kind B2 · utility

1Cited by

256References

15Claims

0Family size

Assignee

The Braun Corporation · DE

Inventors

Torsten Klemm · Bad Soden, DE
Ingo Vetter · Karben, DE
Uwe Jungnickel · Königstein, DE
Benedikt Heil · Diez, DE
Kris Lueckel · Schwalbach, DE

Key dates

Filing date	Aug 19, 2011
Grant date	Oct 15, 2013
Priority date	—
Expiry date	Jan 19, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02P25/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A resonant motor unit that has a resonant motor, a control unit, a measurement unit, and an evaluation unit is described. The control unit drives the resonant motor at a driving frequency, short-circuits the resonant motor during at least a first short-circuiting phase in successive driving cycles and concludes the first short-circuiting phases by switching off the current flow through the resonant motor at least at a predetermined first time instant within the driving cycles. The measurement unit successively measures at least a first voltage signal provided by the resonant motor at the predetermined first time instant, and the evaluation unit for determines whether the first voltage signal has changed between successive measurements.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.