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InstaSPIN-FOC的SVGEN为啥不考虑直流母线电压哇？

Hoo Asnow
Intellectual 711 points

1、在传统的SVPWM计算占空比时，切换时间的计算都是要考虑直流母线电压的，但是InstaSPIN-FOC的SVGEN却没看到有用，这是为什么哇？

2、在Id和Iq的PI控制中，有如下代码，请问这段代码的作用是什么？

// compute the Kp gain
// Scale Kp instead of output to prevent saturation issues
if(CTRL_getFlag_enableDcBusComp(handle))
{
Kp_Id = _IQmpy(Kp_Id,EST_getOneOverDcBus_pu(obj->estHandle));
}

// compute the Kp gain

// Scale Kp instead of output to prevent saturation issues
if(CTRL_getFlag_enableDcBusComp(handle))
{
Kp_Iq = _IQmpy(Kp_Iq,EST_getOneOverDcBus_pu(obj->estHandle));
}

  • 0
    TI__Guru 60308 points

    1. 你可以看下面的书了解这里使用的SVPWM原理

    The SVM technique used with InstaSPIN is discussed in the following reference:

    Advanced Electric Drives, Analysis, Control and Modeling using Simulink, by Ned Mohan, MNPERE Press, Minneapolis, MN 55414, 2001, ISBN# 0-9715292-0-5

    This technique was selected because it seamlessly transitions into the overmodulation region of operation by simply increasing the amplitude of the voltage variables from the Inverse Park Transform.  A natural clipping effect occurs which causes the waveforms to change from sinusoidal to trapezoidal.

    You can replace the SVM module with a more conventional technique if you desire.  But you must then manage the overmodulation yourself.

    2. 当使能直流母线补偿的时候，当发生直流母线波动的情况，会在这儿加一个电压前馈。

    ERIC

  • 0 回复 Eric Ma
    Intellectual 711 points

    Eric Ma 说：

    1. 你可以看下面的书了解这里使用的SVPWM原理

    The SVM technique used with InstaSPIN is discussed in the following reference:

    Advanced Electric Drives, Analysis, Control and Modeling using Simulink, by Ned Mohan, MNPERE Press, Minneapolis, MN 55414, 2001, ISBN# 0-9715292-0-5

    This technique was selected because it seamlessly transitions into the overmodulation region of operation by simply increasing the amplitude of the voltage variables from the Inverse Park Transform.  A natural clipping effect occurs which causes the waveforms to change from sinusoidal to trapezoidal.

    You can replace the SVM module with a more conventional technique if you desire.  But you must then manage the overmodulation yourself.

    2. 当使能直流母线补偿的时候，当发生直流母线波动的情况，会在这儿加一个电压前馈。

    ERIC

    书里面也是对ualpha以及ubeta除了一个Udc哇。。。。

    理论上也是要让ualpha以及ubeta除以一个直流母线电压才对的哇。

  • 0 回复 Eric Ma
    Intellectual 711 points

    Eric Ma 说：

    1. 你可以看下面的书了解这里使用的SVPWM原理

    The SVM technique used with InstaSPIN is discussed in the following reference:

    Advanced Electric Drives, Analysis, Control and Modeling using Simulink, by Ned Mohan, MNPERE Press, Minneapolis, MN 55414, 2001, ISBN# 0-9715292-0-5

    This technique was selected because it seamlessly transitions into the overmodulation region of operation by simply increasing the amplitude of the voltage variables from the Inverse Park Transform.  A natural clipping effect occurs which causes the waveforms to change from sinusoidal to trapezoidal.

    You can replace the SVM module with a more conventional technique if you desire.  But you must then manage the overmodulation yourself.

    2. 当使能直流母线补偿的时候，当发生直流母线波动的情况，会在这儿加一个电压前馈。

    ERIC

    那本书上也是将Ualpha和Ubeta除以了Udc哇？

    理论上就是应该要除以一个直流母线电压的。