Bruckner Maschinenbau Gmbh

Bernd Sieber

Paul Lindner

Jurgen Breil

Günter Oedl

Ulrich Ruhlemann

The invention relates to a method and to a circuit arrangement used to regulate synchronous linear motors, especially linear drive mechanisms in film drawing systems. The force (F) between the stationary primary part and the moved secondary part is determined in a sensorless manner from the voltages and currents calculated and measured in a frequency converter in a functional block, in such a manner that the integral is calculated from the active power during a time period (t) between two pulses (new) produced by an overriding control and said integral is divided by the active length (1) of the primary part. Alternatively, the force (F) can also be determined by summation of the voltages in the f-axis in order to reduce the drop in voltage in relation to the resistance (R) of the branch in the primary part. Voltages and currents are transformed on the primary part by a co-ordinate system related to the secondary part.

Method and circuit arrangement for the sensorless determination of load states of synchronous linear motors

An improved arrangement for operating a contact roller () and an associated method, characterized inter alia by the following features: a linear motor drive () is allocated to the contact roller () in order to change positon; a force adjustment device () is provided for the linear motor drive (); a suitable sensor is also provied in order to determine speed or acceleration.

Arrangement for operating a contact roller and associated method for operating a contact roller

Speed adjusting apparatus for plastic drawing installations

Magnetic tenter lever actuating device

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Siegsdorf, Germany

Bernd Sieber