Patent · US Expired

Device and method for detecting the coil temperature of a direct-current motor, especially a brushless direct-current motor

US4897584A · kind A · utility

20Cited by

10References

12Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Bertold Grutzmacher · Schriesheim, DE
Peter Eiswirth · Heidelberg, DE
Helmut Meyer · Hilden, DE

Key dates

Filing date	Mar 2, 1988
Grant date	Jan 30, 1990
Priority date	—
Expiry date	Mar 2, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH02H6/005
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A device and method for detecting the coil temperature of a direct-current motor by determining the resistance of at least one coil of the motor. The method includes measuring a parameter of the at least one coil while the motor is running. The measurement is made at a time interval in which the coil is without current. The measuring device includes a commutation circuit of the motor which generates a time interval used for measuring the current.

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