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我现在是用F280049做移相全桥的峰值电流控制，参考了TIDM-02000的控制逻辑。使用CMPSS4来作为比较器输出，EPWM1为超前桥臂固定不动，EPWM2为滞后桥臂使用DCEVT来触发2A和2B的动作。
当前测试为，在CMPSS4的DCA使用斜坡发生器来进行DAC输出电压的下降。使用信号发生器在B4口固定输入一个电压，通过调节这个电压应该能够得到不同的输出移相角。
发现在特定输入电压的情况下会发生动作异常，如下图，其中黄色为EPWM1A，绿色为EPWM2A，可以看到出现了一个窄脉冲出现比较频繁（当前输入为615mV）由于驱动是使用变压器进行隔离，这个情况多次出现会导致Mos驱动电压异常，导致控制异常。
在实际使用峰值电流运行时候同样会出现这样的问题。请问是配置上有问题，还是芯片逻辑出现异常？
当前配置用的sysconfig文件如附件。
/**
* These arguments were used when this file was generated. They will be automatically applied on subsequent loads
* via the GUI or CLI. Run CLI with '--help' for additional information on how to override these arguments.
* @cliArgs --device "F28004x" --part "F28004x_100PZ" --package "F28004x_100PZ" --context "system" --product "C2000WARE@5.04.00.00"
* @v2CliArgs --device "TMS320F280041C" --package "100PZ" --context "system" --product "C2000WARE@5.04.00.00"
* @versions {"tool":"1.21.0+3721"}
*/
/**
* Import the modules used in this configuration.
*/
const cmpss = scripting.addModule("/driverlib/cmpss.js", {}, false);
const cmpss1 = cmpss.addInstance();
const epwm = scripting.addModule("/driverlib/epwm.js", {}, false);
const epwm1 = epwm.addInstance();
const epwm2 = epwm.addInstance();
const epwm3 = epwm.addInstance();
const epwmxbar = scripting.addModule("/driverlib/epwmxbar.js", {}, false);
const epwmxbar1 = epwmxbar.addInstance();
const gpio = scripting.addModule("/driverlib/gpio.js", {}, false);
const gpio1 = gpio.addInstance();
const inputxbar_input = scripting.addModule("/driverlib/inputxbar_input.js", {}, false);
const inputxbar_input1 = inputxbar_input.addInstance();
const outputxbar = scripting.addModule("/driverlib/outputxbar.js", {}, false);
const outputxbar1 = outputxbar.addInstance();
/**
* Write custom configuration values to the imported modules.
*/
cmpss1.$name = "myCMPSS0";
cmpss1.cmpssBase = "CMPSS4_BASE";
cmpss1.dacValHigh = 1024;
cmpss1.latchResetHigh = true;
cmpss1.configLatchHigh = true;
cmpss1.configBlanking = "2";
cmpss1.enableBlanking = true;
cmpss1.dacValSource = "CMPSS_DACSRC_RAMP";
cmpss1.enableModule = true;
cmpss1.ramDecVal = 10;
cmpss1.pwmSyncSrc = "4";
cmpss1.maxRampVal = 16000;
cmpss1.dacValLoad = "CMPSS_DACVAL_PWMSYNC";
epwm1.$name = "myEPWM0";
epwm1.epwmTimebase_periodGld = true;
epwm1.epwmTimebase_counterMode = "EPWM_COUNTER_MODE_UP_DOWN";
epwm1.epwmTimebase_counterModeAfterSync = "EPWM_COUNT_MODE_UP_AFTER_SYNC";
epwm1.epwmTimebase_syncOutPulseMode = "EPWM_SYNC_OUT_PULSE_ON_COUNTER_ZERO";
epwm1.epwmDeadband_inputFED = "EPWM_DB_INPUT_EPWMB";
epwm1.epwmDeadband_redShadowLoadEvent = "EPWM_RED_LOAD_ON_CNTR_ZERO_PERIOD";
epwm1.epwmDeadband_delayRED = 50;
epwm1.epwmDeadband_fedShadowLoadEvent = "EPWM_FED_LOAD_ON_CNTR_ZERO_PERIOD";
epwm1.epwmDeadband_delayFED = 50;
epwm1.epwmDigitalCompare_EPWM_DC_TYPE_DCAH = "EPWM_DC_TRIP_TRIPIN5";
epwm1.epwmDigitalCompare_dcFilterInput = "EPWM_DC_WINDOW_SOURCE_DCAEVT2";
epwm1.epwmTimebase_hsClockDiv = "EPWM_HSCLOCK_DIVIDER_1";
epwm1.epwmTripZone_cbcPulse = "EPWM_TZ_CBC_PULSE_CLR_CNTR_ZERO_PERIOD";
epwm1.epwmDigitalCompare_EPWM_DC_MODULE_A_EPWM_DC_EVENT_1_eventSync = "EPWM_DC_EVENT_INPUT_NOT_SYNCED";
epwm1.epwmDigitalCompare_EPWM_DC_MODULE_A_EPWM_DC_EVENT_2_eventSync = "EPWM_DC_EVENT_INPUT_NOT_SYNCED";
epwm1.epwmDigitalCompare_EPWM_TZ_DC_OUTPUT_A2 = "EPWM_TZ_EVENT_DCXH_HIGH";
epwm1.epwmTripZone_cbcSource = ["EPWM_TZ_SIGNAL_DCAEVT2","EPWM_TZ_SIGNAL_DCBEVT2"];
epwm1.epwmDigitalCompare_EPWM_DC_MODULE_A_EPWM_DC_EVENT_2_eventSource = "EPWM_DC_EVENT_SOURCE_FILT_SIGNAL";
epwm1.epwmActionQualifier_t2Source = "EPWM_AQ_TRIGGER_EVENT_TRIG_DC_EVTFILT";
epwm1.epwmDigitalCompare_useBlankingWindow = true;
epwm1.epwmDigitalCompare_blankingWindowEvent = "EPWM_DC_WINDOW_START_TBCTR_ZERO_PERIOD";
epwm1.epwmTimebase_phaseEnable = true;
epwm1.epwmDeadband_polarityFED = "EPWM_DB_POLARITY_ACTIVE_LOW";
epwm1.hrpwm_syncSource = "HRPWM_PWMSYNC_SOURCE_ZERO";
epwm1.epwmTripZone_EPWM_TZ_ACTION_EVENT_DCAEVT2 = "EPWM_TZ_ACTION_DISABLE";
epwm1.epwmTripZone_EPWM_TZ_ACTION_EVENT_DCBEVT2 = "EPWM_TZ_ACTION_DISABLE";
epwm1.epwmDeadband_enableRED = true;
epwm1.epwmDeadband_redShadowMode = true;
epwm1.epwmDeadband_enableFED = true;
epwm1.epwmDeadband_fedShadowMode = true;
epwm1.epwmTimebase_phaseShift = 2;
epwm1.epwmTimebase_counterValue = 2;
epwm1.epwmDigitalCompare_blankingWindowOffset = 490;
epwm1.epwmDigitalCompare_blankingWindowLength = 20;
epwm1.epwmActionQualifier_t1Source = "EPWM_AQ_TRIGGER_EVENT_TRIG_DC_EVTFILT";
epwm1.epwmTripZone_EPWM_TZ_ACTION_EVENT_TZB = "EPWM_TZ_ACTION_DISABLE";
epwm1.epwmTripZone_EPWM_TZ_ACTION_EVENT_TZA = "EPWM_TZ_ACTION_DISABLE";
epwm1.epwmTripZone_EPWM_TZ_ACTION_EVENT_DCAEVT1 = "EPWM_TZ_ACTION_LOW";
epwm1.epwmTripZone_EPWM_TZ_ACTION_EVENT_DCBEVT1 = "EPWM_TZ_ACTION_LOW";
epwm1.epwmDigitalCompare_EPWM_TZ_DC_OUTPUT_B1 = "EPWM_TZ_EVENT_DCXL_LOW";
epwm1.epwmDigitalCompare_EPWM_DC_MODULE_B_EPWM_DC_EVENT_1_eventSync = "EPWM_DC_EVENT_INPUT_NOT_SYNCED";
epwm1.epwmDigitalCompare_EPWM_DC_MODULE_B_EPWM_DC_EVENT_2_eventSync = "EPWM_DC_EVENT_INPUT_NOT_SYNCED";
epwm1.epwmTripZone_oneShotSource = ["EPWM_TZ_SIGNAL_DCAEVT1","EPWM_TZ_SIGNAL_DCBEVT1","EPWM_TZ_SIGNAL_OSHT1"];
epwm1.epwmDigitalCompare_EPWM_TZ_DC_OUTPUT_A1 = "EPWM_TZ_EVENT_DCXL_LOW";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_A_ON_TIMEBASE_ZERO = "EPWM_AQ_OUTPUT_HIGH";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_A_ON_TIMEBASE_PERIOD = "EPWM_AQ_OUTPUT_LOW";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_A_ON_T2_COUNT_UP = "EPWM_AQ_OUTPUT_LOW";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_A_ON_T2_COUNT_DOWN = "EPWM_AQ_OUTPUT_HIGH";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_B_ON_TIMEBASE_ZERO = "EPWM_AQ_OUTPUT_HIGH";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_B_ON_TIMEBASE_PERIOD = "EPWM_AQ_OUTPUT_LOW";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_B_ON_T2_COUNT_UP = "EPWM_AQ_OUTPUT_LOW";
epwm1.epwmActionQualifier_EPWM_AQ_OUTPUT_B_ON_T2_COUNT_DOWN = "EPWM_AQ_OUTPUT_HIGH";
epwm1.epwmTimebase_period = 500;
epwm1.epwm.$assign = "EPWM2";
epwm1.epwm.epwm_aPin.$assign = "GPIO2";
epwm1.epwm.epwm_bPin.$assign = "GPIO3";
epwm2.$name = "myEPWM1";
epwm2.epwmTimebase_hsClockDiv = "EPWM_HSCLOCK_DIVIDER_1";
epwm2.epwmTimebase_period = 500;
epwm2.epwmTimebase_counterMode = "EPWM_COUNTER_MODE_UP_DOWN";
epwm2.epwmTimebase_forceSyncPulse = true;
epwm2.epwmTimebase_syncOutPulseMode = "EPWM_SYNC_OUT_PULSE_ON_COUNTER_ZERO";
epwm2.hrpwm_syncSource = "HRPWM_PWMSYNC_SOURCE_ZERO";
epwm2.epwmActionQualifier_EPWM_AQ_OUTPUT_A_ON_TIMEBASE_ZERO = "EPWM_AQ_OUTPUT_HIGH";
epwm2.epwmActionQualifier_EPWM_AQ_OUTPUT_A_ON_TIMEBASE_PERIOD = "EPWM_AQ_OUTPUT_LOW";
epwm2.epwmActionQualifier_EPWM_AQ_OUTPUT_B_ON_TIMEBASE_ZERO = "EPWM_AQ_OUTPUT_HIGH";
epwm2.epwmActionQualifier_EPWM_AQ_OUTPUT_B_ON_TIMEBASE_PERIOD = "EPWM_AQ_OUTPUT_LOW";
epwm2.epwmDeadband_inputFED = "EPWM_DB_INPUT_EPWMB";
epwm2.epwmDeadband_polarityFED = "EPWM_DB_POLARITY_ACTIVE_LOW";
epwm2.epwmDeadband_enableRED = true;
epwm2.epwmDeadband_redShadowMode = true;
epwm2.epwmDeadband_delayRED = 50;
epwm2.epwmDeadband_delayFED = 50;
epwm2.epwmDeadband_fedShadowMode = true;
epwm2.epwmDeadband_enableFED = true;
epwm2.epwmTripZone_oneShotSource = ["EPWM_TZ_SIGNAL_OSHT1"];
epwm2.epwmTripZone_EPWM_TZ_ACTION_EVENT_TZA = "EPWM_TZ_ACTION_LOW";
epwm2.epwmTripZone_EPWM_TZ_ACTION_EVENT_TZB = "EPWM_TZ_ACTION_LOW";
epwm2.epwm.$assign = "EPWM1";
epwm2.epwm.epwm_aPin.$assign = "GPIO0";
epwm2.epwm.epwm_bPin.$assign = "GPIO1";
epwm3.$name = "myEPWM2";
epwm3.epwmTimebase_hsClockDiv = "EPWM_HSCLOCK_DIVIDER_1";
epwm3.epwmTimebase_period = 250;
epwm3.epwmTimebase_counterMode = "EPWM_COUNTER_MODE_UP_DOWN";
epwm3.hrpwm_syncSource = "HRPWM_PWMSYNC_SOURCE_ZERO";
epwm3.epwmTimebase_counterModeAfterSync = "EPWM_COUNT_MODE_UP_AFTER_SYNC";
epwm3.epwmTimebase_phaseEnable = true;
epwm3.epwm.$assign = "EPWM4";
epwmxbar1.$name = "myEPWMXBAR0";
epwmxbar1.tripInput = "XBAR_TRIP5";
epwmxbar1.muxesUsed = ["XBAR_MUX06"];
gpio1.$name = "myGPIO0";
gpio1.gpioPin.$assign = "GPIO9";
inputxbar_input1.$name = "myINPUTXBARINPUT0";
inputxbar_input1.inputxbarGpio = "GPIO9";
outputxbar1.$name = "myOUTPUTXBAR0";
outputxbar1.muxesUsed = ["XBAR_MUX06"];
outputxbar1.outputxbar.outputxbarPin.$assign = "GPIO31";
/**
* Pinmux solution for unlocked pins/peripherals. This ensures that minor changes to the automatic solver in a future
* version of the tool will not impact the pinmux you originally saw. These lines can be completely deleted in order to
* re-solve from scratch.
*/
epwm3.epwm.epwm_aPin.$suggestSolution = "GPIO6";
epwm3.epwm.epwm_bPin.$suggestSolution = "GPIO7";
outputxbar1.outputxbar.$suggestSolution = "OUTPUTXBAR8";我发现您为此逻辑设置的配置没有问题。 我对您的测试设置有几个问题。
1.我看到你已经在ePWM1中设置了空白窗口偏移和长度,它以固定频率运行。 如果在ePWM2上发生CBC跳闸，为什么在epwm2中不应用此设置？
2.此外,您是否确保所有这些ePWM1，ePWM2和CMPSSDACRAMP(递减)都与ePWM4同步? 如果未同步，则可能是问题所在。
3.您是否尝试更改斜坡值(cmpss1.ramDecVal)以查看此振荡消失? 尝试为斜坡输入激进值，以查看振荡是否消失。
4.此外,您有没有看过我们更新的参考设计。 其中，使用ePWM生成同步源，具有UP计数模式。 您还可以尝试研究PMP23126实现的逻辑。 您可以在C2000Ware_DigitalPower_SDK中找到软件用户指南：C:\ti\C2000\C2000Ware_DigitalPower_SDK_5_xx_xx_xx\solutions\pmp23126\docs