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关于TMS320F28035 高分变率功能在数字LLC中的应用问题？

lv jianming
Prodigy 20 points
Other Parts Discussed in Thread: TMS320F28035

大侠们好，我在做数字LLC产品，LLC是通过变频率控制输出的，在TI  TMS320F28035 的DATASHEET文档 EPWM章节中有几页介绍了LLC的应用和例程。但例程中

EPwm1Regs.HRCNFG.all = 0x0;
EPwm1Regs.HRCNFG.bit.EDGMODE = HR_FEP;
EPwm1Regs.HRCNFG.bit.CTLMODE = HR_CMP;
EPwm1Regs.HRCNFG.bit.HRLOAD = HR_CTR_PRD; EDIS;

这边EDGMODE 采用的是下降沿模式。

我的理解是 ：LLC是变周期工作的。应该是双边沿模式才对吧？

请高手指教下，是下降沿模式还是双边沿模式更好。

spruge9e28035pwm.pdf
  • 0
    TI__Guru 60308 points

    lv,

    Edge Mode — The MEP can be programmed to provide precise position control on the rising edge (RE), falling edge (FE) or both edges (BE) at the same time. FE and RE are used for power topologies requiring duty cycle control(CMPA high-resolution control), while BE is used for topologies requiring phase shifting, e.g., phase shifted full bridge (TBPHS or TBPRD high-resolution control).

    所以如果是要改变周期的话，我觉得是BE会更好。

    Eric