Method for operating a rotating electrical machine

Electricity: motive power systems – Armature circuit control – Voltage control

Reexamination Certificate

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Details

C318S636000, C318S479000, C363S074000

Reexamination Certificate

active

08004227

ABSTRACT:
A method is specified for operating a rotating electrical machine, in which the rotating electrical machine is connected in terms of phase to a converter circuit, having a DC voltage circuit, for connecting at least two voltage levels, and the phases of the converter circuit are connected to the DC voltage circuit in accordance with a selected switching state combination of switching states for power semiconductor switches in the converter circuit. In order for operation of the rotating electrical machine to be possible in an event, over a number L of sampling times various values are determined, and a switching state combination is set as the selected switching state combination with which a sum of determined values is at its smallest.

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European Search Report for 07116035.2, completed Jan. 24, 2008.
Zhuohui Tan et al., “A Direct Torque Control of Induction Motor Based on Three-level NPC Inverter,” 32nd Annual IEEE Power Electronics Specialists Conference, PESC 2001, Conference Proceedings, Jun. 17-21, 2001, vol. 3, Conference 32, pp. 1435-1439.

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