【翌创ET6001测评】FOC电流环算力
<div class='showpostmsg'><p>测试目的：</p><p > 评估在200M主频下的执行FOC电流环的算力</p>
<p >测试结果：</p>
<p > 如下图所示，ADC完成采样中断时，置IO为高电平，读ADC，计算FOC电流环，设置PWM输出，置IO为低电平。测试得到单次FOC电流环时间为1.72uS。</p>
<p > </p>
<p >说明：</p>
<p > 由于我开发环境，暂无法DEBUG，无法单次调试抓内存数据，只能通过GPIO测定FOC电流环执行时间；</p>
<p >开发板是只有IO的最小系统，没有BLDC电控需要的MOS驱动以及ADC配合PGA的真实采样环路，所以测试的仅为算力测试。一般在100M的M4F上测试，最快常规是5us，本次在ET6001上测到1.72比预期好很多，但由于没有真实的硬件回路，一些过调制case无法执行到。</p>
<p > </p>
<p>入口代码</p>
<pre>
<code>void AdcIrq(void)
{
System_Obj *pS = &SystemObj;
pS->Ia = ADC1->SARC_RESULT.RESULT&0xFFFF;//u
pS->Ib = ADC1->SARC_RESULT.RESULT&0xFFFF;//v
pS->UdcAdc = ADC1->SARC_RESULT.RESULT&0xFFFF;//vbus
pS->SpeedR = ADC1->SARC_RESULT.RESULT&0xFFFF;//spped r
//电流环计算
MotorCurrentLoop(&SystemObj);
}
#define POLS (2)
#define LD (0.000925f)
#define LQ (LD)
#define RS (0.358000f)
#define FI (0.01374f)
void VarInit(System_Obj *pSysObj)
{
extern uint32_t SystemCoreClockFrequency;
pSysObj->MainFreq = SystemCoreClockFrequency;
pSysObj->PwmFreq = 10000;
pSysObj->CtrlFreq = 2000;
pSysObj->HalfDuty = MyDiv16(SystemObj.MainFreq , SystemObj.PwmFreq,0,0)>>2;
pSysObj->VolSampBase = 105;
pSysObj->CurSampBase = 10;
MotorSetParam(RS,LD,LQ,FI);
MotorContrlPamIni();
}
</code></pre>
<p> </p>
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