Other Parts Discussed in Thread: TMS320F280021
问题：用TMS320F280021做LLC充电过程，ePWM3和ePwm4为驱动H桥LLC，PWM工作频率为80K~150K，为软件设置的上下限值，谐振工作频率为90KHZ。当LLC工作过程进行调节频率从85K往下调节，接近80K时，偶尔有几率有发生半桥上下MOS管驱动同高现象，非百分百，MOS管直通短路，管子烧坏。请问各位大神帮忙审核下配置是否有问题？感谢！
波形如下：
短路前一时刻的驱动波形和频率：
以下为PWM配置代码：
void UserSetEPWM()
{
EALLOW;
CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 0;
EDIS;
EALLOW;
GpioCtrlRegs.GPHAMSEL.bit.GPIO242 = 0;
GpioCtrlRegs.GPHQSEL2.bit.GPIO242 = 3;
InputXbarRegs.INPUT1SELECT = 242;
GpioCtrlRegs.GPHLOCK.bit.GPIO242 = 1;
GpioCtrlRegs.GPHCR.bit.GPIO242 = 1;
InputXbarRegs.INPUTSELECTLOCK.bit.INPUT1SELECT = 1;
EPwm1Regs.TZSEL.bit.OSHT1 = TZ_ENABLE;
EPwm2Regs.TZSEL.bit.OSHT1 = TZ_ENABLE;
EPwm3Regs.TZSEL.bit.OSHT1 = TZ_ENABLE;
EPwm4Regs.TZSEL.bit.OSHT1 = TZ_ENABLE;
EPwm1Regs.TZSEL.bit.OSHT5 = TZ_ENABLE;
EPwm2Regs.TZSEL.bit.OSHT5 = TZ_ENABLE;
EPwm3Regs.TZSEL.bit.OSHT5 = TZ_ENABLE;
EPwm4Regs.TZSEL.bit.OSHT5 = TZ_ENABLE;
EPwm1Regs.TZSEL.bit.OSHT6 = TZ_ENABLE;
EPwm2Regs.TZSEL.bit.OSHT6 = TZ_ENABLE;
EPwm3Regs.TZSEL.bit.OSHT6 = TZ_ENABLE;
EPwm4Regs.TZSEL.bit.OSHT6 = TZ_ENABLE;
EPwm1Regs.TZCTL.bit.TZA = TZ_FORCE_LO;
EPwm1Regs.TZCTL.bit.TZB = TZ_FORCE_LO;
EPwm2Regs.TZCTL.bit.TZA = TZ_FORCE_LO;
EPwm2Regs.TZCTL.bit.TZB = TZ_FORCE_LO;
EPwm3Regs.TZCTL.bit.TZA = TZ_FORCE_LO;
EPwm3Regs.TZCTL.bit.TZB = TZ_FORCE_LO;
EPwm4Regs.TZCTL.bit.TZA = TZ_FORCE_LO;
EPwm4Regs.TZCTL.bit.TZB = TZ_FORCE_LO;
EPwm1Regs.TZFRC.bit.OST = 1;
EPwm2Regs.TZFRC.bit.OST = 1;
EPwm3Regs.TZFRC.bit.OST = 1;
EPwm4Regs.TZFRC.bit.OST = 1;
EPwm1Regs.GLDCFG.all = 0x07FF;
EPwm1Regs.GLDCTL.bit.GLDMODE = 6;
EPwm1Regs.GLDCTL.bit.OSHTMODE = 1;
EPwm1Regs.GLDCTL.bit.GLD = 1;
EPwm1Regs.EPWMXLINK.bit.GLDCTL2LINK = 0;
EPwm2Regs.GLDCFG.all = 0x07FF;
EPwm2Regs.GLDCTL.bit.GLDMODE = 6;
EPwm2Regs.GLDCTL.bit.OSHTMODE = 1;
EPwm2Regs.GLDCTL.bit.GLD = 1;
EPwm2Regs.EPWMXLINK.bit.GLDCTL2LINK = 0;
EPwm3Regs.GLDCFG.all = 0x07FF;
EPwm3Regs.GLDCTL.bit.GLDMODE = 6;
EPwm3Regs.GLDCTL.bit.OSHTMODE = 1;
EPwm3Regs.GLDCTL.bit.GLD = 1;
EPwm3Regs.EPWMXLINK.bit.GLDCTL2LINK = 0;
EPwm4Regs.GLDCFG.all = 0x07FF;
EPwm4Regs.GLDCTL.bit.GLDMODE = 6;
EPwm4Regs.GLDCTL.bit.OSHTMODE = 1;
EPwm4Regs.GLDCTL.bit.GLD = 1;
EPwm4Regs.EPWMXLINK.bit.GLDCTL2LINK = 0;
EDIS;
EPwm1Regs.TBPRD = EPWMPeriod;
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; // TBCLK = SYSCLKOUT /(HSPCLKDIV ×CLKDIV)
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm1Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm1Regs.TBCTL.bit.PHSEN = TB_ENABLE; //使能同步
EPwm1Regs.TBPHS.bit.TBPHS = 0;
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count updown
EPwm1Regs.EPWMSYNCINSEL.bit.SEL = SYNC_IN_SRC_DISABLE_ALL;
EPwm1Regs.EPWMSYNCOUTEN.bit.ZEROEN = SYNC_OUT_SRC_ENABLE;
EPwm2Regs.TBPRD = EPWMPeriod;
EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV1; // TBCLK = SYSCLKOUT /(HSPCLKDIV ×CLKDIV)
EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm2Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm2Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE;
EPwm2Regs.TBPHS.bit.TBPHS = 2;
EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count updown
EPwm2Regs.EPWMSYNCINSEL.bit.SEL = SYNC_IN_SRC_SYNCOUT_EPWM1;
EPwm3Regs.TBPRD = EPWMPeriod;
EPwm3Regs.TBCTL.bit.CLKDIV = TB_DIV1; // TBCLK = SYSCLKOUT /(HSPCLKDIV ×CLKDIV)
EPwm3Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm3Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm3Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm3Regs.TBCTL.bit.PHSEN = TB_ENABLE;
EPwm3Regs.TBPHS.bit.TBPHS = 3; //补偿10ns数字隔离器延迟
EPwm3Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count updown
EPwm3Regs.EPWMSYNCINSEL.bit.SEL = SYNC_IN_SRC_SYNCOUT_EPWM1;
EPwm4Regs.TBPRD = EPWMPeriod;
EPwm4Regs.TBCTL.bit.CLKDIV = TB_DIV1; // TBCLK = SYSCLKOUT /(HSPCLKDIV ×CLKDIV)
EPwm4Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm4Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm4Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm4Regs.TBCTL.bit.PHSEN = TB_ENABLE;
EPwm4Regs.TBPHS.bit.TBPHS = 3; //补偿10ns数字隔离器延迟
EPwm4Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count updown
EPwm4Regs.EPWMSYNCINSEL.bit.SEL = SYNC_IN_SRC_SYNCOUT_EPWM1;
EPwm5Regs.TBPRD = 1000;
EPwm5Regs.TBCTL.bit.CLKDIV = TB_DIV1; // TBCLK = SYSCLKOUT /(HSPCLKDIV ×CLKDIV)
EPwm5Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm5Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm5Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm5Regs.TBCTL.bit.PHSEN = TB_DISABLE;
// EPwm5Regs.TBPHS.bit.TBPHS = 2; //补偿10ns数字隔离器延迟
EPwm5Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count updown
EPwm5Regs.EPWMSYNCINSEL.bit.SEL = SYNC_IN_SRC_DISABLE_ALL;
//计数比较模块设定
EPwm1Regs.TBCTR = 0; //计数初值为0
EPwm1Regs.CMPA.bit.CMPA = EPWMPeriod_DIV2 - LeastTime_LLC;
EPwm1Regs.CMPB.bit.CMPB = EPWMPeriod_DIV2 + LeastTime_LLC;
EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm2Regs.TBCTR = 0; //计数初值为0
EPwm2Regs.CMPA.bit.CMPA = EPWMPeriod_DIV2 - LeastTime_LLC;
EPwm2Regs.CMPB.bit.CMPB = EPWMPeriod_DIV2 + LeastTime_LLC;
EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm2Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm3Regs.TBCTR = 0; //计数初值为0
EPwm3Regs.CMPA.bit.CMPA = EPWMPeriod_DIV2 - LeastTime_LLC;
EPwm3Regs.CMPB.bit.CMPB = EPWMPeriod_DIV2 + LeastTime_LLC;
EPwm3Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm3Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm3Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm3Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm4Regs.TBCTR = 0; //计数初值为0
EPwm4Regs.CMPA.bit.CMPA = EPWMPeriod_DIV2 - LeastTime_LLC;
EPwm4Regs.CMPB.bit.CMPB = EPWMPeriod_DIV2 + LeastTime_LLC;
EPwm4Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm4Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm4Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm4Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm5Regs.TBCTR = 0; //计数初值为0
// EPwm5Regs.CMPA.bit.CMPA = 0;
// EPwm5Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
// EPwm5Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
// AQ模块设定
EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;
EPwm1Regs.AQCTLA.bit.CBU = AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.CBD = AQ_SET;
EPwm1Regs.AQCTLB.bit.CAD = AQ_CLEAR;
EPwm1Regs.AQCTLA.bit.ZRO = AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.ZRO = AQ_CLEAR;
EPwm2Regs.AQCTLB.bit.CAU = AQ_SET;
EPwm2Regs.AQCTLB.bit.CBU = AQ_CLEAR;
EPwm2Regs.AQCTLA.bit.CBD = AQ_SET;
EPwm2Regs.AQCTLA.bit.CAD = AQ_CLEAR;
EPwm2Regs.AQCTLA.bit.ZRO = AQ_CLEAR;
EPwm2Regs.AQCTLB.bit.ZRO = AQ_CLEAR;
EPwm3Regs.AQCTLA.bit.CAU = AQ_SET;
EPwm3Regs.AQCTLA.bit.CBU = AQ_CLEAR;
EPwm3Regs.AQCTLB.bit.CBD = AQ_SET;
EPwm3Regs.AQCTLB.bit.CAD = AQ_CLEAR;
EPwm3Regs.AQCTLA.bit.ZRO = AQ_CLEAR;
EPwm3Regs.AQCTLB.bit.ZRO = AQ_CLEAR;
EPwm4Regs.AQCTLB.bit.CAU = AQ_SET;
EPwm4Regs.AQCTLB.bit.CBU = AQ_CLEAR;
EPwm4Regs.AQCTLA.bit.CBD = AQ_SET;
EPwm4Regs.AQCTLA.bit.CAD = AQ_CLEAR;
EPwm4Regs.AQCTLA.bit.ZRO = AQ_CLEAR;
EPwm4Regs.AQCTLB.bit.ZRO = AQ_CLEAR;
//DB死区模块设定
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_DISABLE;
EPwm2Regs.DBCTL.bit.OUT_MODE = DB_DISABLE;
EPwm3Regs.DBCTL.bit.OUT_MODE = DB_DISABLE;
EPwm4Regs.DBCTL.bit.OUT_MODE = DB_DISABLE;
EPwm1Regs.GLDCTL2.bit.GFRCLD = 1;
EPwm5Regs.ETSEL.bit.SOCAEN = 1; // 1 Enable the ADC Start of Conversion B (EPWMxSOCB) Pulse, Enable EPWMxSOCB pulse.
EPwm5Regs.ETSEL.bit.SOCASEL = ET_CTR_ZERO; //PRD 触发ADC_B
EPwm5Regs.ETPS.bit.SOCAPRD = ET_1ST;
// EPwm1Regs.ETSEL.bit.INTEN = 1; // 1 Enable the ADC Start of Conversion B (EPWMxSOCB) Pulse, Enable EPWMxSOCB pulse.
// EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; //PRD 触发ADC_B
// EPwm1Regs.ETPS.bit.INTPRD = ET_1ST;
EALLOW;
CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 1;
EDIS;
}
以下为PWM转载代码：
void loadpwm()
{
F_SW = CC_PID.PIDU; //PI计算值
F_SW = __fmin(150,F_SW);
F_SW = __fmax(80,F_SW);
EPWMPeriod = 50000 / F_SW;
EPWMPeriod_DIV2 = EPWMPeriod / 2;
LLC_Hduty_EPWM = LLC_duty * EPWMPeriod_DIV2;
if( LLC_Hduty_EPWM > EPWMPeriod_DIV2 - 25 )
{
LLC_Hduty_EPWM = EPWMPeriod_DIV2 - 25;
}
EPWMPeriod = EPWM_Cal_SW / F_SW;
EPWMPeriod_DIV2 = EPWMPeriod / 2;
EPWMPeriod = EPWMPeriod_DIV2 * 2;
F_Int = 50;
T_Ctrl = 0.001f/F_Int;
EPwm3Regs.TBPRD = EPWMPeriod; //Period of TB = 10kHz
EPwm4Regs.TBPRD = EPWMPeriod; //Period of TB = 10kHz
EPwm3Regs.CMPA.bit.CMPA = EPWMPeriod_DIV2 - LLC_Hduty_EPWM;
EPwm3Regs.CMPB.bit.CMPB = EPWMPeriod_DIV2 + LLC_Hduty_EPWM;
EPwm4Regs.CMPA.bit.CMPA = EPWMPeriod_DIV2 - LLC_Hduty_EPWM;
EPwm4Regs.CMPB.bit.CMPB = EPWMPeriod_DIV2 + LLC_Hduty_EPWM;
EPwm1Regs.GLDCTL2.bit.OSHTLD = 1;
}
