Patent · US Expired

Electric motor with electronic brake

US6998804B2 · kind B2 · utility

10Cited by

14References

10Claims

0Family size

Assignee

C. & E. Fein GmbH & Co. KG · DE

Inventors

Christoph Meyer · Herzogenrath, DE
Christof Kress · Deizisau, DE
Alfred Schreiber · Tauberbischofsheim, DE

Key dates

Filing date	Jul 23, 2003
Grant date	Feb 14, 2006
Priority date	—
Expiry date	Aug 14, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH02P3/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A retarded electric motor designed as a series motor or an asynchronous motor having a squirrel cage rotor. A valve is provided for switching between motor operation and braking operation. During motor operation the motor is operated in a known configuration as series motor or as asynchronous motor. If configured as a series motor, the valve (S1, S2, S3) allows to bypass the armature and to operate the motor as an externally excited direct current generator when switching into braking operation. If configured as an asynchronous motor, a switch is utilized to disconnect at least two field windings from mains. A valve is utilized to excite the motor externally from mains with a pulsating direct current during braking.

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