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请问28035如何实现高精度移相，使用TBPHSHR寄存器，能发我一下例程吗

user6532300
Prodigy 160 points
Other Parts Discussed in Thread: TMS320F280049C

如题，请求实现28035高精度移相例程或者配置，谢谢
  • 0
    TI__Guru**** 252096 points
    抱歉，我们没有高精度移相的例程。在用户指南3.3.7 Practical Applications Using Phase Control Between PWM Modules中提到相关内容，您可以看一下

    www.ti.com/.../sprui10.pdf

    另外在该帖中有提到：

    当将HRPWM与变频驱动器一起使用时，每次调整频率时都需要提供一个同步信号。不幸的是，这将在同步脉冲发生时引入抖动。F2803x设备上无法解决此问题。

    在诸如TMS320F280049C这样的较新设备上，我们实现了新功能，可以使此操作不会发生抖动。

    e2e.ti.com/.../ccs-tms320f28035-how-to-set-up-hrpwm-for-high-resolution-period-control-in-phase-shifted-system-jitter-issues
  • 0 回复 Susan Yang
    Prodigy 160 points
    谢谢您的回复，我们可以定频运行，想1A和2A实现高精度移相，但是现在操作不了，我能吧我的程序发给您，帮忙看一下哪里有问题吗
  • 0 回复 user6532300
    TI__Guru**** 252096 points

    user6532300 说：
    想1A和2A实现高精度移相，但是现在操作不了

    能具体描述一下吗？

  • 0 回复 Susan Yang
    Prodigy 160 points
    麻烦您帮忙看一下：我1A和2A的频率都是110k，0-180的移相范围就是0-236，这个调节对控制来说太粗了，想用高精度细分移相调节，
    比如我算出来移相角是90.5，如果不用高精度，就只能移相90，另外的0.5就会被忽略导致控制精度丢失，为了这0.5能调节，我是这样配置的高精度移相：
    PWM初始化部分：
    void InitEPwm2Example() //滞后臂
    {
    //
    // Setup TBCLK
    //
    EALLOW;
    EPwm2Regs.TBCTL.bit.PRDLD = TB_SHADOW;
    EPwm2Regs.TBPRD = period1; // Set timer period
    // EPwm2Regs.TBPHS.all = 0;
    EPwm2Regs.TBPHS.half.TBPHS = PHS; // Phase is 0
    EPwm2Regs.TBPHS.half.TBPHSHR = 0; // Phase is 0
    EPwm2Regs.CMPA.half.CMPA=272;
    // EPwm2Regs.CMPB = 100;
    EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
    EPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE;

    EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;

    EPwm2Regs.TBCTR = 0x0000; // Clear counter
    EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; // Clock ratio to SYSCLKOUT
    EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV1;

    EPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm2Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
    EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
    EPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

    // EPwm2Regs.AQCTLB.bit.CAU = AQ_CLEAR;
    // EPwm2Regs.AQCTLB.bit.PRD = AQ_SET;
    EPwm2Regs.AQCTLB.bit.CAU = AQ_NO_ACTION;
    EPwm2Regs.AQCTLB.bit.PRD = AQ_NO_ACTION;

    EPwm2Regs.DBCTL.bit.IN_MODE = 3;
    EPwm2Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
    // EPwm2Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC;
    EPwm2Regs.DBFED = db; //死区300ns
    EPwm2Regs.DBRED = db;
    EDIS;
    EALLOW;
    EPwm2Regs.HRCNFG.all = 0x0;
    EPwm2Regs.HRCNFG.bit.EDGMODE = HR_BEP; // MEP control on falling edge
    EPwm2Regs.HRCNFG.bit.CTLMODE = HR_PHS;
    EPwm2Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO;

    EPwm2Regs.HRCNFG.bit.SWAPAB=0;
    EPwm2Regs.HRCNFG.bit.SELOUTB=0;
    EPwm2Regs.HRCNFG.bit.AUTOCONV = 0;
    EPwm2Regs.HRPCTL.bit.HRPE = 1;
    EPwm2Regs.HRPCTL.bit.TBPHSHRLOADE = 1;
    EDIS;

    EALLOW;
    EPwm2Regs.TZCTL.bit.TZA = 2;
    EPwm2Regs.TZCTL.bit.TZB = 2;
    EDIS;
    }


    应用部分：
    PID_Value.pidvalue = 100.5;
    EPwm2Regs.TBPHS.half.TBPHS = (Uint16) PID_Value.pidvalue;
    EPwm2Regs.TBPHS.half.TBPHSHR =( (Uint16) (( (PID_Value.pidvalue - EPwm2Regs.TBPHS.half.TBPHS)*93+0.5))) <<8;
  • 0 回复 user6532300
    TI__Guru**** 252096 points
    已经回复您的私信，请看一下