To　reduce　the　underwater　noise　of　the　permanent　magnet　synchronous　motor　(PMSM)　for　electric　propulsion,　a　novel　control　method　for　vibration　reduction　with　the　sawtooth　carrier　was　proposed.　Instead　of　the　traditional　triangle　carrier,　the　sawtooth　carrier　was　used　for　space　vector　pulse　width　modulation　of　PMSM.　Thus,　the　amplitude　of　the　sideband　harmonics　on　both　sides　of　the　fundamental　current　was　reduced,　and　the　low　frequency　vibration　was　also　decreased.　To　reduce　the　high　frequency　current　harmonics　caused　by　the　sawtooth　carrier,　the　dual　random　control　(DRC)　method　was　further　presented　based　on　the　sawtooth　carrier.　By　using　the　random　switching　frequency　control　and　the　random　zero　vector　control　simultaneously,　both　the　amplitude　of　the　high　frequency　current　harmonics　and　the　high　frequency　vibration　at　the　integer　multiple　of　the　switching　frequency,　were　all　decreased　effectively.　The　experimental　results　show　that,　with　the　sawtooth　carrier　DRC,　the　vibration　acceleration　can　be　reduced　obviously　in　both　low　frequency　and　high　frequency　band.　Moreover,　the　sawtooth　carrier　reduces　the　low　frequency　vibration　acceleration　by　nearly　60%　in　comparison　with　the　traditional　triangle　carrier.　©　2019　Chin.　Soc.　for　Elec.　Eng.