TY - JOUR
T1 - Spread Spectrum Modulation by Using Asymmetric-Carrier Random PWM
AU - Mathe, Laszlo
AU - Lungeanu, Florin
AU - Sera, Dezso
AU - Rasmussen, Peter Omand
AU - Pedersen, John Kim
PY - 2012
Y1 - 2012
N2 - This paper presents a new fixed carrier frequency random PWM 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.
AB - This paper presents a new fixed carrier frequency random PWM 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.
KW - AC motor drives
KW - Acoustic noise
KW - Modulation
KW - Pulsewidth modulated (PWM) power converters
UR - http://www.scopus.com/inward/record.url?scp=84860433087&partnerID=8YFLogxK
U2 - 10.1109/TIE.2011.2179272
DO - 10.1109/TIE.2011.2179272
M3 - Journal article
SN - 0278-0046
VL - 59
SP - 3710
EP - 3718
JO - I E E E Transactions on Industrial Electronics
JF - I E E E Transactions on Industrial Electronics
IS - 10
ER -