Loading [MathJax]/extensions/tex2jax.js
Spread Spectrum Modulation by Using Asymmetric-Carrier Random PWM | IEEE Journals & Magazine | IEEE Xplore

Spread Spectrum Modulation by Using Asymmetric-Carrier Random PWM


Abstract:

This paper presents a new fixed-carrier-frequency random pulsewidth modulation method, where a new type of carrier wave is proposed for modulation. Based on simulations a...Show More

Abstract:

This paper presents a new fixed-carrier-frequency random pulsewidth modulation method, where a new type of carrier wave is proposed for modulation. Based on simulations and experimental measurements, it is shown that the spread effect of the discrete components from the motor current spectra and acoustic spectra is very effective and is independent from the modulation index. The flat motor current spectrum generates an acoustical noise close to the white noise, which improves the acoustical performance of the drive. The new carrier wave is easy to implement digitally, without employing any external circuits. The modulation method can be used in both open- and closed-loop motor control applications.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 59, Issue: 10, October 2012)
Page(s): 3710 - 3718
Date of Publication: 22 December 2011

ISSN Information:


References

References is not available for this document.