Patent · US Active

Permanent magnet, and electric machine comprising same, and a method for producing the electric machine

US9653978B2 · kind B2 · utility

6Cited by

4References

22Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Maik Zernikow · Hildesheim, DE
Klaus Eppel · Achern, DE

Key dates

Filing date	Mar 13, 2013
Grant date	May 16, 2017
Priority date	—
Expiry date	Jan 2, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49012
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Permanent magnet (10), containing at least one metal component (13) from the group of the rare earth metals, comprising a first coating film (20), which forms a cathodic protection against corrosion for the permanent magnet (10), the first coating film (20) containing a metal (23) which is more electronegative in the electrochemical series than the metal component (13) of the permanent magnet (10), wherein a second coating film (30), which is embodied in an electrically insulating fashion, is applied on the first coating film (20).

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