In　view　of　different　distribution　of　zero　state　vectors　resulting　in　various　switching　waveforms　in　space　vector　pulse　width　modulation　(SVPWM),　the　distribution　of　zero　state　vectors　is　analyzed　in　details　by　introducing　a　distribution　factor,　and　the　principle　why　SVPWM　embodies　discontinuous　and　continuous　PWM　methods　is　revealed.　The　calculations　of　switching　points　are　discussed　with　different　switching　sequences　in　each　sector.　The　general　calculation　equations　are　given　by　taking　the　distribution　factor　as　a　variable.　The　relation　between　the　total　harmonic　distortion　(THD)　of　inverter　output　voltage　and　distribution　factor　as　well　as　the　switching　waveforms　of　SVPWM　are　simulated　and　analyzed.　Simulation　results　show　that　the　distribution　factor　has　a　significant　impact　on　the　characteristics　of　SVPWM　and　verify　the　validity　of　analysis.