Patent · US Expired

Method for regulating a motor current of a brushless D.C. motor

US5296787A · kind A · utility

30Cited by

16References

10Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Kai Albrecht · Heidelberg, DE
Helmut Meyer · Hilden, DE

Key dates

Filing date	Jan 7, 1993
Grant date	Mar 22, 1994
Priority date	—
Expiry date	Jan 7, 2013

Classification

Technology area (CPC H)Electricity
CPC primaryH02P6/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for regulating a motor current in phase windings of a brushless d.c. motor, wherein current is applied to the phase windings individually via an electronically controllable, d.c.-voltage intermediate-circuit converter with switchable semiconductor valves and respective freewheeling diodes connected in parallel with each thereof in individual bridge arms, and an actual value of the motor current is measured exclusively in the d.c.-voltage intermediate circuit, includes switching off, in a motor mode of operation, only one switchable semiconductor valve of the energized bridge arms for a period of time dependent upon the rotational speed of the motor when a reference value of the motor current is reached.

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