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工具与软件:
充电期间不会消耗电流、上 MOSFET 关断、下 MOSFET 的脉冲宽度为约5µs (Ton)、频率为20kHz。
我正在使用 TMS320F28027参考设计和800VA 纯正弦波逆变器设计、因为我要使用此设计实现代码、
EPWM_setClockPrescaler(myEPWM3_BASE, EPWM_CLOCK_DIVIDER_1, EPWM_HSCLOCK_DIVIDER_1); EPWM_setTimeBasePeriod(myEPWM3_BASE, 2500); EPWM_setTimeBaseCounter(myEPWM3_BASE, 0); EPWM_setTimeBaseCounterMode(myEPWM3_BASE, EPWM_COUNTER_MODE_UP_DOWN); EPWM_disablePhaseShiftLoad(myEPWM3_BASE); EPWM_setPhaseShift(myEPWM3_BASE, 0); EPWM_setCounterCompareValue(myEPWM3_BASE, EPWM_COUNTER_COMPARE_A, 1); EPWM_setCounterCompareShadowLoadMode(myEPWM3_BASE, EPWM_COUNTER_COMPARE_A, EPWM_COMP_LOAD_ON_CNTR_ZERO); EPWM_setCounterCompareValue(myEPWM3_BASE, EPWM_COUNTER_COMPARE_B, 1); EPWM_setCounterCompareShadowLoadMode(myEPWM3_BASE, EPWM_COUNTER_COMPARE_B, EPWM_COMP_LOAD_ON_CNTR_ZERO); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_PERIOD); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPB); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPB); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_PERIOD); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPB); EPWM_setActionQualifierAction(myEPWM3_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPB); EPWM_setRisingEdgeDelayCountShadowLoadMode(myEPWM3_BASE, EPWM_RED_LOAD_ON_CNTR_ZERO); EPWM_disableRisingEdgeDelayCountShadowLoadMode(myEPWM3_BASE); EPWM_setFallingEdgeDelayCountShadowLoadMode(myEPWM3_BASE, EPWM_FED_LOAD_ON_CNTR_ZERO); EPWM_disableFallingEdgeDelayCountShadowLoadMode(myEPWM3_BASE); EPWM_enableInterrupt(myEPWM3_BASE); EPWM_setInterruptSource(myEPWM3_BASE, EPWM_INT_TBCTR_ZERO); EPWM_setInterruptEventCount(myEPWM3_BASE, 3); // EPWM_setDeadBandDelayPolarity(myEPWM3_BASE, EPWM_DB_FED, EPWM_DB_POLARITY_ACTIVE_LOW); EPWM_setDeadBandDelayMode(myEPWM3_BASE, EPWM_DB_RED, false); EPWM_setRisingEdgeDelayCountShadowLoadMode(myEPWM3_BASE, EPWM_RED_LOAD_ON_CNTR_ZERO); EPWM_disableRisingEdgeDelayCountShadowLoadMode(myEPWM3_BASE); EPWM_setRisingEdgeDelayCount(myEPWM3_BASE, 0); EPWM_setDeadBandDelayMode(myEPWM3_BASE, EPWM_DB_FED, false); EPWM_setFallingEdgeDelayCountShadowLoadMode(myEPWM3_BASE, EPWM_FED_LOAD_ON_CNTR_ZERO); EPWM_disableFallingEdgeDelayCountShadowLoadMode(myEPWM3_BASE); EPWM_setFallingEdgeDelayCount(myEPWM3_BASE, 0);
尊敬的 Santosh:
您使用的是什么参考设计?
此致!
Ryan Ma
尊敬的 Santosh:
我会将该主题分配给相应的负责人。 为耽误您的时间而道歉。
尊敬的 Santosh:
您可以引用 C2000wareDPSDK Ware_Digital 中的 C:\ti\c2000\C2000_dv2000_sdk_5_03_00_00\solutions\tidm_hv_1ph_dcac\f28004x\voltagesourceinvlcfltr。 根据电网连接或 VSI 解决方案进行选择。
该设计采用 F280049C 器件、可以将上述配置与您的 F280025C 代码进行比较。
以下是 PWM 生成的用户指南: https://www.ti.com/lit/ug/tidub21d/tidub21d.pdf?PWM=1737053914201 ts
我建议首先比较在开环中运行系统的 PWM 波形。
谢谢、此致、
Uttam
谢谢!
解决了我的问题...
尊敬的 Santhosh:
您能指出这里的问题是什么吗? 是 ePWM 配置错误还是其他错误?
此致!
Uttam