Low speed position estimator for switched reluctance machine usi

Details Low speed position estimator for switched reluctance machine usi Low speed position estimator for switched reluctance machine usi

1994-06-23

1996-06-11

Wysocki, Jonathan

Electricity: motive power systems

Synchronous motor systems

Hysteresis or reluctance motor systems

318254, H02P 700

Patent

active

055258867

ABSTRACT:
A method for estimating rotor position of a switched reluctance motor during rotor start-up or low speed operation includes applying a sequence of relatively high frequency, short duration electric probing pulses to at least two inactive excitation phase windings of a multi-phase motor. The voltage and current at each of the two inactive excitation phase windings are measured and the resultant values used to compute an estimated rotor/stator linkage/flux in each of the two excitation phase windings. The computed linkage/flux and measured phase current of the two inactive excitation windings is then used in a model to determine the rotor position. In one form, rotor position is determined by establishing a table of values representing rotor position as a function of phase current for each of a plurality of values of motor phase linkage/flux and selecting from the table a value of rotor position corresponding to the measured phase current and computed linkage/flux for the phase.

REFERENCES:
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patent: 5410235 (1995-04-01), Ehsani

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