Patent · US Expired

Method and apparatus for determining stepping motor parameters from induced voltages

US4065708A · kind A · utility

11Cited by

3References

8Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Hartmut Ulland · Stuttgart, DE
Volker Zimmermann · Mannheim, DE
Rainer Zuehlke

Key dates

Filing date	Oct 6, 1975
Grant date	Dec 27, 1977
Priority date	—
Expiry date	Oct 6, 1995

Classification

Technology area (CPC H)Electricity
CPC primaryH02P8/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An improved method and apparatus for determining the speed and position values of a stepping motor for controlling or regulating the same. These values are derived from induced voltages within the bifilar windings of the stepping motor combined with voltages across and currents through the same bifilar windings. The speed values are derived from the amplitude of the induced voltages and the position values are derived from the zero transitions of the induced voltages. A desirable advance of the motor is distinguished from an undesirable oscillation of the motor by determining whether the induced voltages in the bifilar windings become zero simultaneously.

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