H - Electricity – 02 – P
Patent
H - Electricity
02
P
310/119
H02P 6/18 (2006.01) H02P 25/08 (2006.01)
Patent
CA 2037042
In a method for sensorless control of a reluctance motor the actual magnetic flux is compared with tabulated values of the non-linear function between the magnetic flux and the current for the angular position at which a commutation signal (via P15-P18) is to be emitted to the power stages (1-4) for the stator pole windings (H10-H13) of the motor. The actual value of the magnetic flux is calculated for each sample interval, based on the sampled values of voltage (u via P7) and current (i via P8) according to the relation .DELTA.? = (u-R.i).DELTA.t, where R is the resistance of the actual pole winding and the actual power stage. The instantaneous flux value .DELTA.? received is added to the value of the magnetic flux previously received. The added value constitutes the actual value, referred to above, which is to be compared with tabulated values.
Aktiebolaget Electrolux
Fetherstonhaugh & Co.
LandOfFree
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