Patent · US Active

Method and circuit arrangement for sensorless engine load detection and for controlling the motor current in accordance with the load value in stepper motors

US8564230B2 · kind B2 · utility

6Cited by

5References

11Claims

0Family size

Assignee

TRINAMIC MOTION CONTROL GMBH & CO. KG · DE

Inventors

Bernhard Dwersteg · Hamburg, DE
Lars Larsson · Hamburg, DE

Key dates

Filing date	Sep 6, 2010
Grant date	Oct 22, 2013
Priority date	—
Expiry date	Sep 11, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02P8/16
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method and a circuit arrangement are provided which enable a mechanical load applied to the motor shaft of a stepper motor (M) or a load angle of the stepper motor to be detected in a sensorless manner. A method and circuit arrangement are also provided which enable the motor current(s) of a stepper motor to be controlled in accordance with the load value such that the load angle is as high as possible without risking step losses, in order to maintain the current consumption of the motor as low as possible. This is achieved according by evaluating the temporal duration of the ON- and the FD-phases during the chopper control of the motor.

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