SVPWM-3L扇区分配及作用时间

SVPWM算法是以合成电压矢量在XYZ平面三轴坐标系的旋转为基础的，其将平面坐标UdPOOONNPPOOONOPO-NON、OA相开关状态值1100P0110O0011N因为开关状态除去零电压矢量外还有24种，其扇区在两电平的6大扇区的基础上，在大小隔成4个小区间。以第一扇区0960为例，在这个扇区里的分区情况见下图三：根据伏秒平衡公式根据伏秒平衡公式，可以得到在9角时各小区的作用时间如下图五：小扇区的作用时间表如下图(所有的时间以下图为准，并且k为上图的调制比m，且2V*DC55BC11114BC1111113BC1111112BC1111116B1111BC111111111111C111111111111111A111A111A111A111A111A111个。结合表一，对应的开关状态如表三所示：01-101000Ud/3Ud/3NN01110100234566010Ud/3OPO7011Ud/3OPP8001Ud/3OOP9101Ud/3POP0-1-1Ud/3ONN00-1Ud/3OON-10-1Ud/3NON-100Ud/3NOO-1-10Ud/3NNO0-10Ud/3ONO1-1-1dPNN10-1sqrt*Ud/3PON11-1UdPPN01-1OPN-11-1NPN-110NPO-111NPP-101NOP-1-11NNP0-11ONP1-11PNP1-10V18sqrt(3)*Ud/3PNO矢量组就可以确定，然后由电压矢量组可以确定各相开关管的开关序列。SVPWM，对中点电压无影响。PON下的中点：4零矢量时图可知，零矢量对中点电压也无影响。矢量名矢量名iO为正时中点电压变化对应矢量正小矢量-ia↑V1PO-ib↑V3-ic↑V5P↑V4↑V6↑V2负小矢量NN↓V1↓V3↓V5-ia↓V4NO-ib↓V6N-ic↓V2对中点电位的偏移主要有硬件法(采用均压电路等箝位电容的中点电位)和软件法(采集中点电压值和三相相电流，通过小矢量的冗余矢量来抑制中点偏移)两种。将6大扇区，24个小扇区按内三角(D1、D5、D9、D13、D17、D21)、中三角(D3、D22、D24)划分，可以建立表五(此表同表二)：TbTbTbTbNNNONNNPOPONNPOPPPOPPNONNNONONNONNNODDDD3自身转换时TaTbTcTcTaTbTaTbTcTaTbTbTaTcTbTaD3ONNOONPONPONPOOPPOPPOPOOPONOONONNONNOONPONPOOPPOD7PPOOPOOPNOPNOONNONNONOONOPNOPOPPOPPOOPOOPNOONNOND11NONNOONPONPOOPOOPPOPOOPONPONOONONNONNOONPOOPOOPOD15OPPOOPNOPNOPNOONNONNONOONOPOOPOPPOPPOOPNOPNOONNOD19NNOONOONPONPOOPPOPPOPOOPONPONONNONNOONOONPOOPPOPD23POPPOOPNOPNOONOONNONNONOPNOPOOPOPPOPPOOPNOONOONNTsTs/2Ts/2Ts/2TaTaTbTcTaTaTcTbTaD2ONNPNNPONPOOPOOPONPNNONND4PPOPPNPONOONOONPONPPNPPOD6PPOPPNOPNOONOONOPNPPNPPOD8NONNPNOPNOPOOPOOPNNPNNOND10NONNPNNPOOPOOPONPONPNNOND12OPPNPPNPONOONOONPONPPOPPD14OPPNPPNOPNOONOONOPNPPOPPD16NNONNPNOPOOPOOPNOPNNPNNOD18NNONNPONPOOPOOPONPNNPNNOD20POPPNPONPONOONOONPPNPPOPD22POPPNPPNOONOONOPNOPNPPOPD24ONNPNNPNOPOOPOOPNOPNNONNTsTs/2其中24个扇区与大扇区和小扇区的对应关系如小表六所示。DD大扇区-小扇区DE-A1DE-A2DE-A3DE-A4DF-A1DF-A2DF-A3DF-A4D大扇区-小扇区DBADBADBADBADCA1大扇区判断3b2DC|A3|3|3b2DC|A3|3||lr3a3b|V=lr3a3b根据下表七来确定合成电压矢量V*是在那个大扇区里面，NN123456扇区261435和和||r2a〈V|r2a|V=V–lr3b(1V–1U|A1(3b2DC|4DC|lA4V0，V0,Vrrr3)其中的A1、A2、A3、A4为各扇区的四个小区(其位置见图四)。确定好合成电压矢量V*所处的扇区后，结合表五、表六来确定在这个小扇区内ABC三相对应的开关状态，然后结合图五来确定各开关状态对应的时间。FPGA要具有AD采样、数值运算、过流保护、脉冲生成三个基本功能。1采样ABC电压2生成ab坐标系下电压3根据这个电压、锁相环的相位信息、公式来确定分区(第几扇区的第几小区)4按对应的表格输出对应时间/占空比的脉冲组合2小区域判断(以第1扇区为例)3开关顺序表4作用时间/占空比表abc435162则各小区内各作用矢量对应的作用时间/占空比表可以改成(其中，I、III、V扇区的时3入1232入13入123231入232131入23入211111112222222TbTbTbTb入入1V63入12VI632入11V531入2VI53入211V31VI31V41VI41TbTb2V12VI12V22VI22另外构建各小区内的作用矢量序列/三相开关状态序列为(以Ts为1)：II矢量顺序V1-V2-V0-V1V2-V0-V1-V2V1-V2-V8-V1V2-V8-V1-V2V1-V7-V8-V1V2-V8-V9-V2-V1-V0-V2-V1-V2-V1-V0-V2-V1-V8-V2-V1-V2-V1-V8-V2-V1-V8-V7-V1-V2-V9-V8-V2开关状态顺ONN-OON-OOO-POOOON-OOO-POO-PPOONN-OON-PON-POOOON-PON-POO-PPOONN-PNN-PON-POOOON-PON-PPN-PPO序-POO-OOO-OON-ONN-PPO-POO-OOO-OON-POO-PON-OON-ONN-PPO-POO-PON-OON-POO-PON-PNN-ONN-PPO-PPN-PON-OON作用矢量-作V0-TaV1-TbV0-TaV1-TbV1-TaV2-TbV1-TaV2-TbV1-TaV7-TbV2-TaV9-Tb用时间安排V2-TcV2-TcV8-TcV8-TcV8-TcV8-TcII1II2II3II4II5II6矢量顺序V2-V0-V3-V2V3-V2-V0-V3V2-V10-V3-V2V3-V2-V10-V3V2-V10-V9-V2V3-V11-V10-V3-V2-V3-V0-V2-V3-V0-V2-V3-V2-V3-V10-V2-V3-V10-V2-V3-V2-V9-V10-V1-V3-V10-V11-V3开关状态顺OON-OOO-OPO-PPONON-OON-OOO-OPOOON-OPN-OPO-PPONON-OON-OPN-OPOOON-OPN-PPN-PPONON-NPN-OPN-OPO序-PPO-OPO-OOO-OON-OPO-OOO-OON-NON-PPO-OPO-OPN-OON-OPO-OPN-OON-NON-PPO-PPN-OPN-OON-OPO-OPN-NPN-NON作用矢量-作V0-TaV3-TbV0-TaV3-TbV2-TaV3-TbV2-TaV3-TbV2-TaV9-TbV3-TaV11-Tb用时间安排V2-TcV2-TcV10-TcV10-TcV10-TcV10-TcIII1III2III3III4III5III6矢量顺序V3-V4-V0-V3V4-V0-V3-V4V3-V4-V12-V3V4-V12-V3-V4V3-V11-V12-V3V4-V12-V13-V4-V3-V0-V4-V3-V4-V3-V0-V4-V3-V12-V4-V3-V4-V3-V12-V4-V3-V12-V11-V3-V4-V13-V12-V4开关状态顺NON-NOO-OOO-OPONOO-OOO-OPO-OPPNON-NOO-NPO-OPONOO-NPO-OPO-OPPNON-NPN-NPO-OPONOO-NPO-NPP-OPP序-OPO-OOO-NOO-NON-OPP-OPO-OOO-NOO-OPO-NPO-NOO-NON-OPP-OPO-NPO-NOO-OPO-NPO-NPN-NON-OPP-NPP-NPO-NOO作用矢量-作V0-TaV3-TbV0-TaV3-TbV3-TaV4-TbV3-TaV4-TbV3-TaV11-TbV4-TaV13-Tb用时间安排V4-TcV4-TcV12-TcV12-TcV12-TcV12-TcIV1IV2IV3IV4IV5IV6矢量顺序V4-V0-V5-V4V5-V4-V0-V5V4-V14-V5-V4V5-V4-V14-V5V4-V14-V13-V4V5-V15-V14-V5-V4-V5-V0-V4-V5-V0-V4-V5-V4-V5-V14-V4-V5-V14-V4-V5-V4-V13-V14-V4-V5-V14-V15-V5开关状态顺NOO-OOO-OOP-OPPNNO-NOO-OOO-OOPNOO-NOP-OOP-OPPNNO-NOO-NOP-OOPNOO-NOP-NPP-OPPNNO-NNP-NOP-OOP序-OPP-OOP-OOO-NOO-OOP-OOO-NOO-NNO-OPP-OOP-NOP-NOO-OOP-NOP-NOO-NNO-OPP-NPP-NOP-NOO-OOP-NOP-NNP-NNO作用矢作用矢量-作V0-TaV5-TbV0-TaV5-TbV4-TaV5-TbV4-TaV5-TbV4-TaV13-TbV5-TaV15-Tb用时间安排V4-TcV4-TcV14-TcV14-TcV14-TcV14-TcV1V2V3V4V5V6矢量顺序V5-V6-V0-V5V6-V0-V5-V6V5-V6-V16-V5V6-V16-V5-V6V5-V15-V16-V5V6-V16-V17-V6-V5-V0-V6-V5-V6-V5-V0-V6-V5-V16-V6-V5-V6-V5-V16-V6-V5-V16-V15-V5-V6-V17-V16-V6开关状态顺NNO-ONO-OOO-OOPONO-OOO-OOP-POPNNO-ONO-ONP-OOPONO-ONP-OOP-POPNNO-NNP-ONP-OOPONO-ONP-PNP-POP序-OOP-OOO-ONO-NNO-POP-OOP-OOO-ONO-OOP-ONP-ONO-NNO-POP-OOP-ONP-ONO-OOP-ONP-NNP-NNO-POP-PNP-ONP-ONO作用矢量-作V0-TaV5-TbV0-TaV5-TbV5-TaV6-TbV5-Ta