Electric machine

US6242822A · kind A · utility

Inventors

• Rolf Strothmann · Riegelsberg, DE
• Thomas Strothmann · Bramsche, DE

Key dates

• Filing date: Jan 12, 1998
• Grant date: Jun 5, 2001
• Expiry date: Jan 12, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K1/2726
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An electric machine includes a separately exited rotor arrangement for the generation of magnetic fields which follow one another in the movement direction of the rotor, each magnetic field corresponding to a whole magnetic period, and stator poles arranged so as to follow one another along the rotor arrangement, wherein a number of stator poles which is not a whole number is allotted to a magnetic period. A varying offset between the magnetic field periods and the stator poles caused by the difference is at least partly compensated for by a correspondingly time-delay supply of the stator pole windings.