NDLI: Investigation Into the High-Frequency Limits and Performance of Load Commutated Inverters for High-Speed Synchronous Motor Drives

Content Provider	IEEE Xplore Digital Library
Author	Tessarolo, A. Bassi, C. Ferrari, G. Giulivo, D. Macuglia, R. Menis, R.
Copyright Year	1982
Abstract	Load commutated inverters (LCIs) are still widely used for their robustness and reliability in high-power synchronous motor drives, in either single or multiple three-phase configurations. A restriction to their use in high-speed applications is due to the criticalities of thyristor operation at high switching frequencies. The upper frequency limits of LCIs are usually addressed in the existing literature as something independent of the drive architecture. On the contrary, this paper highlights how the maximum frequency that can be safely attained closely relates to the number of LCIs that are used to supply the synchronous motor. In fact, moving from a single to multiple three-phase arrangements is proved to introduce more stringent frequency constraints due to the mutual interaction between stator windings during commutations. Frequency limits for safe operation of single- and multiple-LCI drives are derived in quantitative terms and experimentally assessed on a 2-MW synchronous motor fed by a couple of LCIs. Practical implications of such limits in the design of high-power high-speed drives are finally discussed.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	2147
Ending Page	2157
Page Count	11
File Size	1561825
File Format	PDF
ISSN	02780046
Volume Number	60
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synchronous motors Commutation Thyristors Stator windings Voltage measurement Inverters variable-speed drives AC–AC power conversion modeling rotating machine transient analysis synchronous motor drives synchronous motors thyristor motor drives
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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