Robert Boschgmbh

Torsten Wilharm

Wolfgang Krauth

Juri Hartmann

Dirk Eisenblaetter

Martin Bergt

The invention relates to a scroll compressor () and to a method for operating the scroll compressor (). The scroll compressor () has a stator (), an orbiter () which can be moved about an orbiter axis () relative to the stator (), and a coupling device (). The stator () and the orbiter () engage into each other and at least partly delimit at least one working area () for compressing a fluid () which can be filled into the working area (). The coupling device () has a first coupling unit () which is arranged on the stator () and a second coupling unit () which is arranged on the orbiter () opposite the first coupling unit (), wherein the first coupling unit () is magnetically coupled to the second coupling unit (), and the second coupling unit () introduces a coupling torque (M) which acts about the orbiter axis () into the orbiter ().

Scroll compressor and method for operating the scroll compressor

The invention is based on a motor apparatus, in particular on an EC motor apparatus, comprising at least one stator () which has at least twelve coils (), and comprising at least one power supply unit (). It is proposed that coils (), which directly follow one another in the circumferential direction (), of the at least one stator () are connected to differing phases of the power supply unit () in at least one operating state.

Motor apparatus comprising at least twelve coils

A method for determining a rotor position of a two-phase synchronous machine including two strands. The method is useful for electronically commuting the synchronous machine. The method includes alternately actuating each of the strands in a first actuating time window with an actuating value of positive polarity and in a second actuating time window with an actuating value of negative polarity, where the first and the second actuating time window alternately follow each other. The method further includes applying an actuating value of 0 during a measuring time window which is provided within at least one of the actuating time windows of a strand. The method further includes applying a measuring pulse to the corresponding strand within the measuring time window in order to measure the inductance of the corresponding strand as an indication of the rotor position. In general, the strand inductance is dependent on the rotor position.

Method and device for determining a rotor position of a synchronous machine

A method is proposed for supplying electrical power to a DC motor () which can be commutated electronically via a semiconductor power output stage (), preferably a three-phase DC motor, through which a control unit () passes current in blocks, corresponding to the signals from a rotor position sensor (). Current is passed through the motor () variably in steps, in such a manner that the magnitude and/or the duration and/or the trigger angle of the current blocks can be varied as a function of the rotation speed and/or of the load, with respect to the profile of the induced voltage (E).

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Ottersweier, Germany

Torsten Wilharm