Siemens Aktiengesellschaft

Winergy Ag

Rolf-Jürgen Steinigeweg

Elmar Schäfers

Uwe Ladra

Gerhard Heinemann

Volker Kreidler

Albrecht Donat

Rolf Florschütz

A drive unit for a machine, in particular a machine-tool, robot and the like, is described. The drive unit has several components, and each component has at least one associated component-specific function, and a uniform communication module that forms an interface with the other components. The interfaces of the various components can be connected by logical point-to-point connections or via a bus. Each component is designated with a particular type, and the communication between the components uses a type-specific communication protocol. A least one of the components is a hierarchically superior component.

Drive unit and method for using the drive unit to control a machine tool

In two of the three phases of a synchronous machine, the feeding or driving current is measured. During 240.degree. of an operating cycle of the synchronous machine, a reference signal is generated which is proportional to the measured current of one or the other of the feeding signals, whereas during the remaining 120.degree. the magnitude of the sum of the feeding currents of the two phases constitute the reference signal.

Apparatus for forming the actual value of a torque in a three-phase

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Herzogenaurach, Germany

Rolf-Jürgen Steinigeweg