The　existing　SVPWM　(space　vector　pulse　width　modulation)　overmodulation　algorithm　is　complex　and　involves　division　operation.　Hence,　a　new　type　of　splitting　variable　modulation　waveform　was　developed.　The　modulation　waveform　is　a　sinusoidal　wave　in　the　linear　range　of　modulation　index　M∈[0,　1],　while　in　the　M∈(1,　4/π)　overmodulation　range,　the　sine　wave　is　split　into　two　sinusoidal　curves　that　can　be　changed　independently.　The　two　splitting　curves　are　connected　to　form　a　new　modulation　waveform.　The　area　of　the　new　modulation　waveform　further　expends　with　the　increase　of　M　until　approaching　the　square　waveform.　In　the　linear　range,　through　a　triangle　carrier　waveform　sampling,　changing　the　modulating　waveform　height　linearly　changes　PWM　fundamental　amplitude.　In　the　overmodulation　range,　reducing　the　splitting　angle　further　increases　the　fundamental　amplitude　till　approaching　a　square　waveform.　The　optimal　splitting　angle＇s　initial　value　can　be　obtained　by　studying　the　relationship　between　the　harmonics　of　PWM　in　overmodulation　range　and　the　initial　value　of　splitting　angle.　The　new　PWM　algorithm　is　simple.　Compared　to　SPWM,　its　total　harmonic　current　distortion　THD　is　identical　in　the　linear　range;　and　it　is　still　continuously　lower　at　M∈(1,　1.2)　overmodulation　range.　The　experimental　results　had　been　confirmed　the　validity　and　superiority　of　the　new　technique.　©　2017,　The　editorial　office　of　Transaction　of　China　Electrotechnical　Society.　All　right　reserved.