Controller with phase voltage evaluation for a three phase generator
AssigneeRobert Bosch GmbH
InventorsThomas Koss, Guenter Nasswetter
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Abstract
A voltage controller for a three-phase generator is disclosed in which the phase voltage of the generator is evaluated. This phase voltage is evaluated with the aid of a window comparator with variable thresholds. Via a VCL signal, which switches over each time a threshold adaptation occurs, a frequency-dependent signal can be generated that can be evaluated as a measure for the generator rpm.
Claims7
A voltage controller for a three-phase generator having phase windings and one exciter winding, having means for detecting and evaluating at least one phase voltage and taking the detected phase voltage into account in the control of the exciting current flowing through the exciter winding, characterized in that the phase voltage is delivered to a window comparator, whose thresholds are variable;
- that a threshold change takes place when the phase voltage reaches one of the thresholds, and an output signal is generated that is dependent on the frequency of the phase voltage and in particular that changes its level each time a threshold changes.
Dependencies are inferred from the claim text.