Experimental investigation of a naval propulsion drive model with PWM-based attenuation of the acoustic and electromagnetic noise

Combined random space vector modulation for a variable speed drive using induction motor

“…16 and 17 shows that for each scheme, the current and the torque have close shapes of PSDs; this is expected because the field-oriented control attempts to get proportionality between the current and the torque [17]. Second, these results confirm the spread PSD when using RSVM techniques and the most important reduction of the peaks is obtained using TRSVM scheme, which is the sought behavior for reducing motor audible noise annoyances in the variable speed drive [6,[14][15][16][17].…”

“…• Second, we point out the spread spectrum of the current and the torque when using TRSVM. This represents a b an improvement at low frequencies, knowing the strong correlation between the reduction of the peaks of the electromagnetic torque at low frequencies (frequencies below 21 kHz) and the mitigation of acoustic noise in the speed drive [2,6,[13][14][15]17].…”

“…In this section, we are interested in the advantage of TRSVM from the point of view of spreading the torque spectrum, which allows mitigating the audible annoyances in variable speed drives [6,[14][15][16][17]. Some works based on the current ripple analysis in both deterministic and random PWM are published in the literature; in general, the randomization affects the current ripple [17,23,24].…”

“…In addition to the compliance with EMC standards for EMI at low frequencies, this technique allows to mitigate the acoustic noise in variable speed drives such as in automotive applications, aerospace and naval propulsion [6,[14][15][16][17].…”

A chirp PWM scheme for brushless DC motor drives

“…Extensive research has been carried on EMI reduction with majority of the schemes based on some form of dithering in the switching frequency or switching sequence [1] [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. However, some alternative pathways had also been explored.…”