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Method and system for estimating differential inductances in an electrical machine
Karlsruhe Institute of Technology.
ABB Corporate Research.
2015 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A self-commissioning method for estimating differential inductances in an electric machine, such as e.g. a synchronous reluctance machine or interior permanent magnet machine, with cross-magnetization effects is provided. The electric machine is driven with PWM voltages to explore current plurality of operating points of the currents in the electric machine while keeping the electric machine at standstill or quasi-standstill. At each operating point PWM switching voltage transients are used as a small-signal excitation. Currents of the electric machine are measured by means of oversampling, which permit the reconstruction of the waveforms including the current ripple within a PWM period caused by the PWM switching transients. Finally, the differential inductances at each operating point are determined based on the determined direct and quadrature current waveforms and voltages.

Place, publisher, year, edition, pages
2015.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-235000OAI: oai:DiVA.org:kth-235000DiVA, id: diva2:1248396
Patent
US 9692339B2 (2017-06-27)
Note

QC 20181207

also published as CN105871280 (A), EP3054583 (A1) and US2016233807 (A1)

Available from: 2018-09-14 Created: 2018-09-14 Last updated: 2018-12-07Bibliographically approved

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Peretti, Luca
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