H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 24/00 (2006.01)
Patent
CA 2597165
The invention specifies a method for determining the rotor angular position of a rotating electrical machine, which machine has a set of stator windings and a set of rotor windings, and in which method the set of stator windings is fed by an associated converter unit. First, the set of stator windings is then short--circuited at at least three predeterminable short--circuiting times (T0, T1, T2) by means of the converter unit within one revolution of the rotor given an assumed speed of the rotor. Then, the phase angle (.alpha.T0, (.alpha.T1, .alpha.T2) of the respective stator current (i ST0, i ST1, i ST2) is determined at each short-circuiting time (T0, T1, T2), a differential phase angle (.DELTA.i1, .DELTA.i2) being formed from phase angles (.alpha.T0, .alpha.T1, .alpha.T2) determined at in each case two temporally adjacent short-circuiting times (T0, T1, T2). Then, the minimum differential phase angle (.DELTA.i min) is determined from the differential phase angles (.DELTA.i1, .DELTA.i2), in the event of a negative minimum differential phase angle (.DELTA.i min), a correction phase angle (.DELTA.i c) being added to the most recently determined phase angle (.alpha.T2), and, in the event of a positive minimum differential phase angle (.DELTA.i min), the correction phase angle (.DELTA.i c) being subtracted from the most recently determined phase angle (.alpha.T2).
Beiser Dirk
Bohren Patrick
Conticelli Fabio
Harder Thorsten
Abb Schweiz Ag
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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