Advances in power semiconductor devices have led to inverters with unprecedented voltage edge rates. This has decreased inverter switching losses and enabled the use of increasingly higher switching frequencies. However, faster edge rates and higher switching frequencies increase electromagnetic compatibility (EMC) problems, machine insulation stress, bearing currents, and other aspects of system design. Typical computer simulations used to design and evaluate proposed electric drive systems cannot be used to predict these high-frequency effects. A wide-bandwidth multi-resolutional analysis that allows designers to anticipate and quantify high-frequency effects is detailed in this paper. The approach is specifically applied to permanent magnet synchronous machine drives, and is validated experimentally.


Electrical and Computer Engineering


University of South Carolina
United States. Office of Naval Research


This work was supported by the University of South Carolina grant no. N00014-96-1-0926 with ONR.

Keywords and Phrases

EMC Problems; Bearing Currents; Computer Simulations; Electric Drive Systems; Electromagnetic Compatibility; High-Frequency Effects; Higher Switching Frequencies; Inverter Switching Losses; Inverters; Invertors; Losses; Machine Insulation Stress; Machine Theory; Permanent Magnet Motors; Permanent Magnet Synchronous Machine Drives; Surface-Mounted PM Synchronous Machine; Switching Circuits; Synchronous Motor Drives; Wide-Bandwidth Multi-Resolutional Analysis

International Standard Serial Number (ISSN)

0885-8969; 1558-0059

Document Type

Article - Journal

Document Version

Final Version

File Type





© 1999 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Dec 1999