Lenze Automation Gmbh

Lenze Drives Gmbh

Thomas Eutebach

Manfred Tinebor

Holger Borcherding

Martin Ehlich

Mario Mueller

Marc Sommer

Carsten Fräger

Sven Hilfert

The invention relates to a monitoring method in which two variables of angle-dependent, amplitude-modulated carrier frequency signals are emitted on orthogonal windings () of the rotational angle sensor and an evaluation is carried out by an input amplifier (V) which emits an output signal that is essentially zero when the signals of the variables are generated according to functional usage. Alternately, an interference signal is generated at one-second intervals in both windings () of the rotational angle sensor, the result of which is being evaluated and monitored by means of an input amplifier (V). An interference display signal is generated at the output of the input amplifier (V), said interference display signal being not equal to zero if no error or interruption is present in the system and equal to zero if an error or interruption is present in the system.

Monitoring a rotational angle sensor

The recognition of a polyphase machine () connected to a converter () is suggested in order to adapt the converter () to the connected machine () prior to an active productive operation. The following is arranged for. Connecting of the polyphase machine with its several electric phases to the converter (). Supplying of at least a first and a second test signal from the converter () to at least one of the several electric phases of the connected machine. Measuring of at least two causal sequences of the test signals. Evaluating of the measuring result to obtain measuring values (r, r) and allocating of these measuring values to a comparison function (). Comparing of the comparison function with a reference function () which represents one type of a polyphase machine.

Detection method for an electrical polyphase machine

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Hameln, Germany

Thomas Eutebach