Patent ID: 11894740
Assignee: WOLONG ELECTRIC GROUP CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 24:
25. The method for selecting a magnitude of a positive voltage pulse and negative voltage pulse for exciting a stator of a sensorless permanent magnet assisted synchronous reluctance motor during startup polarity detection of claim 24, including:
identifying a range of d-axis current values and corresponding d-axis reflection current values, wherein the d-axis current values demagnetize the surface bridge flux density to maintain or achieve leakage flux magnetic desaturation, and wherein the corresponding d-axis reflection current values magnetize the surface bridge flux density to maintain or achieve leakage flux magnetic saturation; and
selecting a voltage pulse magnitude for a polarity detection positive voltage and a negative voltage pulse such that:
one of the positive voltage pulse and the negative voltage pulse produces a d-axis current value within the range of d-axis current values that that demagnetizes the surface bridge flux density to maintain or achieve leakage flux magnetic desaturation, and
the other one of the positive voltage pulse and the negative voltage pulse produces a corresponding d-axis reflection current value that magnetizes the surface bridge flux density to maintain or achieve leakage flux magnetic saturation.