请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。
器件型号：TMS320F280048-Q1 主题中讨论的其他器件：TIDM-02009、 PMP23126
您好、Gus：
我将 PCMC 软件加载到 PSFB CDR 板。 TR 导联拓扑的 I DRIVE 开关、QD 结束电源传输间隔。 我研究了 TIDM-02009、PMP23126的软件。
我将测试 唯一的内部环路性能、因此我通过 UART 更改了 MAXREF 值并更改了峰值电流设定值。
我在 Lext 上获得了以下不等电流波形。 顺便说一下、我使用二极管电桥来纠正 CT 电流的输出。
原理图如下所示。
示波器颜色如下：
绿色：CT 上的电流、 灰色：ADC 信号- CT 的输出、
黄色：变压器的初级电压、 蓝色：2B VDS、
红色：3A VDS
波形1如下所示。
VIN=250 IIN=1.1 Vout=7.9 Iout=31.35、负载为 CR 模式= 0、25 Ω
波形2如下所示。
Vin=250 Iin=2.5 Vout=12.09 Iout=48.12、 CR 模式= 0、25 Ω
波形3如下所示、我移除了钳位二极管并获得以下波形。
VIN=250V、IIN=1.8、Vout=10.09、Iout=40、CR MODE = 0、25 Ω
PWM8在全部为零时生成 SYNCPER 信号、并且我使用 PWM1和 PWM2驱动电源开关。
void SYNC_init(void)
{
SysCtl_setSyncOutputConfig(SYSCTL_SYNC_OUT_SRC_EPWM1SYNCOUT);
//
// For EPWM1, the sync input is: SYSCTL_SYNC_IN_SRC_EXTSYNCIN1
//
SysCtl_setSyncInputConfig(SYSCTL_SYNC_IN_EPWM4, SYSCTL_SYNC_IN_SRC_EPWM1SYNCOUT);
SysCtl_setSyncInputConfig(SYSCTL_SYNC_IN_EPWM7, SYSCTL_SYNC_IN_SRC_EPWM1SYNCOUT);
}
void InitHRPWM1(void)
{
EPWM_setPeriodLoadMode(EPWM1_BASE, EPWM_PERIOD_SHADOW_LOAD);
// Time-Base Submodule Configurations
EPWM_setClockPrescaler(EPWM1_BASE,EPWM_CLOCK_DIVIDER_1,EPWM_HSCLOCK_DIVIDER_1);
EPWM_setTimeBasePeriod(EPWM1_BASE, PeriodValue);
EPWM_setTimeBaseCounter(EPWM1_BASE, 0U);
EPWM_setTimeBaseCounterMode(EPWM1_BASE, EPWM_COUNTER_MODE_UP_DOWN);
//
// Phase Configuration and Set
// Configure PWM base1 as master
// SetPhaseShift as zero!
//
EPWM_disablePhaseShiftLoad(EPWM1_BASE);
EPWM_setPhaseShift(EPWM1_BASE, 0U);
EPWM_setSyncOutPulseMode(EPWM1_BASE, EPWM_SYNC_OUT_PULSE_ON_COUNTER_ZERO);
}
void InitHRPWM2(void)
{
// MISC. Period Load Mode
EPWM_setPeriodLoadMode(EPWM2_BASE, EPWM_PERIOD_SHADOW_LOAD);
// Time-Base Submodule Configurations
EPWM_setClockPrescaler(EPWM2_BASE,EPWM_CLOCK_DIVIDER_1,EPWM_HSCLOCK_DIVIDER_1);
EPWM_setTimeBasePeriod(EPWM2_BASE, PeriodValue);
EPWM_setTimeBaseCounter(EPWM2_BASE, 0U);
EPWM_setTimeBaseCounterMode(EPWM2_BASE, EPWM_COUNTER_MODE_UP_DOWN);
//
// Phase Configuration and Set
// Configure PWM base2 as slave
// SetPhaseShift = Value*TBCLK = Value*10nsec
//
EPWM_enablePhaseShiftLoad(EPWM2_BASE);
EPWM_setSyncOutPulseMode(EPWM2_BASE, EPWM_SYNC_OUT_PULSE_ON_EPWMxSYNCIN);
EPWM_setPhaseShift(EPWM2_BASE, 2); // Value*TBCLKs Phase-Shift is Set
EPWM_setCountModeAfterSync(EPWM2_BASE, EPWM_COUNT_MODE_UP_AFTER_SYNC);
}
void InitHRPWM8(void)
{
EPWM_setPeriodLoadMode(EPWM8_BASE, EPWM_PERIOD_SHADOW_LOAD);
// Time-Base Submodule Configurations
EPWM_setClockPrescaler(EPWM8_BASE,EPWM_CLOCK_DIVIDER_1,EPWM_HSCLOCK_DIVIDER_1);
EPWM_setTimeBasePeriod(EPWM8_BASE, PeriodValue -1);
EPWM_setTimeBaseCounter(EPWM8_BASE, 0);
EPWM_setTimeBaseCounterMode(EPWM8_BASE, EPWM_COUNTER_MODE_UP);
//
// Phase Configuration and Set
// Configure PWM base3 as slave
// SetPhaseShift = Value*TBCLK = Value*10nsec
EPWM_enablePhaseShiftLoad(EPWM8_BASE);
EPWM_setPhaseShift(EPWM8_BASE, 2); // Will be clarified later on!
EPWM_setSyncOutPulseMode(EPWM8_BASE, EPWM_SYNC_OUT_PULSE_ON_EPWMxSYNCIN);
EPWM_setCountModeAfterSync(EPWM8_BASE, EPWM_COUNT_MODE_UP_AFTER_SYNC);
HRPWM_setSyncPulseSource(EPWM8_BASE,HRPWM_PWMSYNC_SOURCE_ZERO);
}
void PSFB_HAL_initCmpssPCMC(void)
{
CMPSS_configHighComparator(CMPSS5_BASE,CMPSS_INSRC_DAC);
ASysCtl_selectCMPHPMux(ASYSCTL_CMPHPMUX_SELECT_5,0);
CMPSS_configDAC(CMPSS5_BASE, CMPSS_DACREF_VDDA |CMPSS_DACVAL_PWMSYNC | CMPSS_DACSRC_RAMP);
CMPSS_configRamp(CMPSS5_BASE,0,0,0U,8U,true);
CMPSS_initFilterHigh(CMPSS5_BASE);
CMPSS_configOutputsHigh(CMPSS5_BASE,
CMPSS_TRIP_ASYNC_COMP | CMPSS_TRIPOUT_ASYNC_COMP);
// Clear the latched comparator events
CMPSS_clearFilterLatchHigh(CMPSS5_BASE);
CMPSS_clearFilterLatchLow(CMPSS5_BASE);
// Enables the CMPSS module.
CMPSS_enableModule(CMPSS5_BASE);
DEVICE_DELAY_US(500);
您能否帮助您了解为什么 ADC 电压上的初级峰值电流电平不相等？
您可以调查我的相关软件行吗？
