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Reduction of the electromagnetic interference conducted to mains in inverter-fed AC drives using random pulse width modulation

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4 Author(s)
Trzynadlowski, A.M. ; Dept. of Electr. Eng., Nevada Univ., Reno, NV, USA ; Zigliotto, M. ; Bolognani, S. ; Bech, M.M.

Results of an experimental investigation of the impact of random pulse width modulation (RPWM) on the electromagnetic interference generated in inverter-fed drive systems are presented. A novel voltage space-vector RPWM technique with a limited pool of switching frequencies was employed. Experiments with an induction motor supplied from a voltage-source inverter, performed in a certified shielded chamber, were focused on the electromagnetic noise conducted to mains. In comparison with the deterministic modulation case, significant reduction of the noise, especially with regard to the quasi-peak values, is shown, demonstrating an important advantage of random modulation.

Published in:

Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE  (Volume:1 )

Date of Conference:

12-15 Oct. 1998