Patent · US Active

Method for operating a work apparatus having an electric motor

US9577567B2 · kind B2 · utility

0Cited by

17References

21Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Jochen Oerding · Ludwigsburg, DE
Rene Wichert · Durlangen, DE
Christian Renz · Biberach, DE
Gernot Liebhard · Waiblingen, DE

Key dates

Filing date	Feb 4, 2013
Grant date	Feb 21, 2017
Priority date	—
Expiry date	Feb 4, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA01D2046/266
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An electric motor in a work apparatus has a power characteristic line which runs between a lower rotational speed of the electric motor and an upper rotational speed of the electric motor. The power characteristic line has a power characteristic with a pronounced maximum (M) and an operating plateau (AP) which lies in a working rotational speed range (AD) of the work apparatus. A method for operating the electric motor provides for configuring the position of the operating plateau (AP) to be variable with respect to the rotational speed of the electric motor to achieve stable operating points over a wide rotational speed range.

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