TI中文支持网Part Number:TIDM-1000
请问这个电压电流参数的VIENNA_iL1Meas_pu是电流的实时检测值吗，VIENNA_iL1MeasOffset_pu为什么这样用呢，我看到之前有个帖子说是吧（-0.5-0.5）转成（-1-1）是什么意思呢，没搞明白
static inline void VIENNA_readCurrVolADCSignals(void)
{
VIENNA_iL1Meas_pu = (((float32_t)(VIENNA_IL1_FB_1 + VIENNA_IL1_FB_2 +
VIENNA_IL1_FB_3 + VIENNA_IL1_FB_4)) *
VIENNA_ADC_PU_SCALE_FACTOR * 0.25f – VIENNA_iL1MeasOffset_pu ) * 2.0f;
VIENNA_iL2Meas_pu = (((float32_t)(VIENNA_IL2_FB_1 + VIENNA_IL2_FB_2 +
VIENNA_IL2_FB_3 + VIENNA_IL2_FB_4)) *
VIENNA_ADC_PU_SCALE_FACTOR * 0.25f – VIENNA_iL2MeasOffset_pu ) * 2.0f;
VIENNA_iL3Meas_pu = (((float32_t)(VIENNA_IL3_FB_1 + VIENNA_IL3_FB_2 +
VIENNA_IL3_FB_3 + VIENNA_IL3_FB_4)) *
VIENNA_ADC_PU_SCALE_FACTOR * 0.25f – VIENNA_iL3MeasOffset_pu ) * 2.0f;
VIENNA_v1Meas_pu = (((float32_t)(VIENNA_V1_FB_1 + VIENNA_V1_FB_2 +
VIENNA_V1_FB_3 + VIENNA_V1_FB_4)) *
VIENNA_ADC_PU_SCALE_FACTOR * 0.25f – VIENNA_v1MeasOffset_pu ) * 2.0f;
VIENNA_v2Meas_pu = (((float32_t)(VIENNA_V2_FB_1 + VIENNA_V2_FB_2 +
VIENNA_V2_FB_3 + VIENNA_V2_FB_4)) *
VIENNA_ADC_PU_SCALE_FACTOR * 0.25f – VIENNA_v2MeasOffset_pu ) * 2.0f;
VIENNA_v3Meas_pu = (((float32_t)(VIENNA_V3_FB_1 + VIENNA_V3_FB_2 +
VIENNA_V3_FB_3 + VIENNA_V3_FB_4)) *
VIENNA_ADC_PU_SCALE_FACTOR * 0.25f – VIENNA_v3MeasOffset_pu ) * 2.0f
Green Deng：
VIENNA_iL1Meas_pu应该是采样值经过调理、补偿等等处理之后的标幺值。
VIENNA_iL1MeasOffset_pu就是补偿。
“* 2.0f”是为了把数值从（-0.5-0.5）转成（-1-1）。
,
sj z：
VIENNA_iL1MeasOffset_pu这个补偿是他的直流偏置吗，为什么这样计算呢
,
sj z：
while(VIENNA_offsetCalCounter < 25000) { if(VIENNA_HAL_getPWMInterruptFlag( VIENNA_C28x_ISR1_INTERRUPT_TRIG_PWM_BASE) == 1) { if(VIENNA_offsetCalCounter > 1000) { // // offset of the inductor current sense // VIENNA_iL1MeasOffset_pu = VIENNA_k1 * (VIENNA_iL1MeasOffset_pu) + VIENNA_k2 * (VIENNA_IL1_FB_1 + VIENNA_IL1_FB_2 + VIENNA_IL1_FB_3 + VIENNA_IL1_FB_4 ) * 0.25 * VIENNA_ADC_PU_SCALE_FACTOR; VIENNA_iL2MeasOffset_pu = VIENNA_k1 * (VIENNA_iL2MeasOffset_pu) + VIENNA_k2 * (VIENNA_IL2_FB_1 + VIENNA_IL2_FB_2 + VIENNA_IL2_FB_3 + VIENNA_IL2_FB_4) * 0.25 * VIENNA_ADC_PU_SCALE_FACTOR; VIENNA_iL3MeasOffset_pu = VIENNA_k1 * (VIENNA_iL3MeasOffset_pu) + VIENNA_k2 * (VIENNA_IL3_FB_1 + VIENNA_IL3_FB_2 + VIENNA_IL3_FB_3 + VIENNA_IL3_FB_4) * 0.25 * VIENNA_ADC_PU_SCALE_FACTOR;
// // offset of the inductor current sense // VIENNA_v1MeasOffset_pu = VIENNA_k1 * (VIENNA_v1MeasOffset_pu) + VIENNA_k2 * (VIENNA_V1_FB_1 + VIENNA_V1_FB_2 + VIENNA_V1_FB_3 + VIENNA_V1_FB_4) * 0.25f * VIENNA_ADC_PU_SCALE_FACTOR; VIENNA_v2MeasOffset_pu = VIENNA_k1 * (VIENNA_v2MeasOffset_pu) + VIENNA_k2 * (VIENNA_V2_FB_1 + VIENNA_V2_FB_2 + VIENNA_V2_FB_3 + VIENNA_V2_FB_4) * 0.25f * VIENNA_ADC_PU_SCALE_FACTOR; VIENNA_v3MeasOffset_pu = VIENNA_k1 * (VIENNA_v3MeasOffset_pu) + VIENNA_k2 * (VIENNA_V3_FB_1 + VIENNA_V3_FB_2 + VIENNA_V3_FB_3 + VIENNA_V3_FB_4) * 0.25f * VIENNA_ADC_PU_SCALE_FACTOR; } VIENNA_HAL_clearPWMInterruptFlag( VIENNA_C28x_ISR1_INTERRUPT_TRIG_PWM_BASE); VIENNA_offsetCalCounter++; } }
,
sj z：
可以帮下忙吗，VIENNA_iL1MeasOffset_pu补偿没有看懂
,
Green Deng：
你好，iL1是：Inductor current measurement Ph1，所以VIENNA_iL1MeasOffset_pu就是相位1的电感电流测试值的补偿。
但是官网提供的资料确实没有对补偿的计算给出更多的解释，如果你确实要了解这方面的信息的话可以去英文E2E上咨询一下这个问题，英文E2E上会有产品线的工程师对这个设计更加了解，资料也更多些：
https://e2e.ti.com/support/microcontrollers/c2000/f/c2000-microcontrollers-forum
,
sj z：
好的，谢谢
