Landis & Gyr Technology Innovation Ag

The Toro Company

Eckhard Schwendemann

Alexander Steven Frick

Klaus Bott

Stephen Paul Elizondo Landers

David Arthur Larose

An angular position change of the linearly driven drive system is proportional to its particular running time. In the process there is determined a desired value of the running time of the drive system belonging to a desired-value angular position (.alpha..sub.S), the drive system is thereupon started and its running time is measured and, when a measured value of the running time is equal to the determined desired value of said running time, the drive system is stopped. By this process the dependability of the drive system is improved and the costs of the latter are reduced.

Process for the position detection of a linearly driven drive system

An automatic firing arrangement (1) has an apparatus for actuating a fan which is driven by a controllable-speed asynchronous motor (2). The apparatus includes a frequency converter (3) with which the speed of rotation of the asynchronous motor (2) is controllable, switching devices (6.1; 6.2; 6.3) by which the asynchronous motor (2) can be temporarily separated from the power supply for a predetermined period of time, and a measuring means (5) with which the speed of rotation and the direction of rotation of the asynchronous motor (2) can be detected by way of the generator action thereof in said period of time.

Growing community of inventors

Buhl-Vimbuch, Germany

Eckhard Schwendemann