Patent · US Expired

Method and apparatus for determining the pole position in a synchronous linear stator motor

US4607203A · kind A · utility

8Cited by

6References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Edgar Bohm · Clausthal-Zellerfeld, DE
Erhard Achenbach · Bad Laasphe, DE

Key dates

Filing date	Aug 1, 1985
Grant date	Aug 19, 1986
Priority date	—
Expiry date	Aug 1, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/64
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

At the rotor of a synchronous linear stator motor, a stray flux measuring device (3', 3") measures the angle .theta. of the stator current distribution .phi. and a speed-measuring device (4) measures a speed containing faults. At the stator, an angle .theta.* for the impressed stator current distribution is taken off and the difference of the two angles (.theta.*-.theta.) indicating the stator current distribution is added as a correction signal to the speed (adder 5), from which the pole position (R) is determined by integration. If the pole position R is used to control the frequency of the stator current thereby, a control loop for the angle difference .theta.*-.theta. is produced which regulates the measured pole position R to the actual pole position.

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