Patent · US Active

Control device and method for determining the rotor angle of a synchronous machine

US9178455B2 · kind B2 · utility

1Cited by

0References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Armin Niederer · Karlsruhe, DE
Gerhard Knecht · Iffezheim, DE
Sebastian Paulus · Esslingen am Neckar, DE
Michael Koerner · Laufenburg (Baden), DE

Key dates

Filing date	Dec 4, 2013
Grant date	Nov 3, 2015
Priority date	—
Expiry date	Feb 26, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH02P6/187
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for determining the rotor angle of a synchronous machine. In one implementation, the method includes generating a multiplicity of pulse-width-modulated drive signals for the phases of an inverter feeding the synchronous machine depending on a voltage to be fed into the synchronous machine, changing the pulse width modulation frequency of at least one drive signal of the multiplicity of pulse-width-modulated drive signals, with the result that the duration of the switching states of the inverter in which an active voltage phasor is output is extended in order to generate a switching pattern for the phases of the inverter, driving the inverter with the generated switching pattern, determining one or more of neutral point potentials at the neutral point of the synchronous machine during driving of the inverter with the switching pattern, and calculating the rotor angle of the synchronous machine depending on the determined neutral point potentials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.