Title:
METHOD FOR OPERATING A MULTIPHASE ELECTRICAL MACHINE AND CORRESPONDING MULTIPHASE ELECTRICAL MACHINE
Document Type and Number:
WIPO Patent Application WO/2014/146772
Kind Code:
A3
Abstract:
The invention relates to a method for operating a multiphase electrical machine, which comprises a rotor and a rotary encoder operatively connected to the rotor, wherein an actual rotational angle of the rotor is determined from a measured rotational angle determined by means of the rotary encoder and a rotational angle offset (θOffset). According to the invention, in order to determine the rotational angle offset (θOffset) the rotor is brought to a specific rotational speed and then an active short circuit of the electrical machine is initiated, wherein an actual current vector (1) is determined, using a dq-transformation, from the current intensities of the currents flowing in at least two of the phases of the electrical machine and the measured rotational angle determined by means of the rotary encoder, and wherein the rotational angle offset (θOffset) is calculated from the actual current vector (1) and a reference current vector (2). The invention further relates to a multiphase electrical machine.
Inventors:
ADAM MARTIN (DE)
KUHN MARCEL (DE)
KUHN MARCEL (DE)
Application Number:
PCT/EP2014/000701
Publication Date:
December 31, 2014
Filing Date:
March 14, 2014
Export Citation:
Assignee:
AUDI AG (DE)
International Classes:
H02P6/16
Foreign References:
| DE102011089341A1 | 2012-07-19 | |||
| DE102008001408A1 | 2009-10-29 |
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