Patent · US Active

EC motor with dynamic determination of optocoupler degradation

US9246418B2 · kind B2 · utility

13Cited by

7References

7Claims

0Family size

Assignee

ebm-papst Mulfingen GmbH & Co. KG · DE

Inventors

Eduard Becker · Weigheim, DE
Martin Schmitt · Lauda-Königshofen, DE
Alexander Hertrich · Dörzbach, DE
Michael Eggensperger · Forchtenberg, DE

Key dates

Filing date	May 14, 2014
Grant date	Jan 26, 2016
Priority date	—
Expiry date	Aug 2, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04Q2209/823
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In an EC motor, comprising a motor electronics, a signal input or a signal output, and an optocoupler for the galvanically isolated transmission of a useful signal between the motor control unit and the signal input or the signal output, the intention is to reliably determine the degradation of the optocoupler and to improve the service life of the EC motor. This is achieved in that an evaluation unit regularly evaluates a saturation voltage of the optocoupler at the output of the optocoupler in relation to a reference threshold when the optocoupler is wired and generates a warning signal when the saturation voltage exceeds the reference threshold.

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