the input parameter of clarke1.Bs & clarke1.As

dfde jiems

Intellectual 510 points

Hi,

In my motor driverboard use FOC to driver it.

I have sample 3 phases Ia、Ib、Ic motor current，then I use Ia、Ib as parameter of clarke1.Bs & clarke1.As，

motor is working normally.

but I use Ia、Ic as parameter of clarke1.Bs & clarke1.As，Motor can not work！

Why ?

thanks!

over 9 years ago

0 ChrisClearman over 9 years ago

TI__Guru** 118000 points

we had this discussion previously didn't we?

http://e2e.ti.com/support/microcontrollers/c2000/f/902/p/360223/1266850.aspx#1266850

0 ChrisClearman over 9 years ago in reply to ChrisClearman

TI__Guru** 118000 points

and this one

http://e2e.ti.com/support/microcontrollers/c2000/f/902/t/332625.aspx

0 dfde jiems over 9 years ago in reply to ChrisClearman

Intellectual 510 points

thanks,

ChrisClearman , and I know that i have posted before as you said!

I just want to know detail why if I use current iu and iv motor works normally, but I use iu and iw it can not work ?

and if I chang PWM output ：Ta、Tb、Tc it works normally when use iu and iw ! why？

ChrisClearman could you tell me the detail about it ?

0 Ramesh Ramamoorthy over 9 years ago in reply to dfde jiems

TI__Mastermind 27240 points

From an inverter stand point, currents are sensed on its outputs A,B and C, and voltage PWMs are applied on its legs A, B and C. Now if you choose to call current C as B, then you should also call voltage PWM C as B. If you did not change voltage PWM A, then you should call PWM B as C. On this basis, PWMs should be applied to the inverter legs. If your case, you computed the pulse width for phase W and applied it on phase V. Hope it explains.

rgds,

ramesh

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the input parameter of clarke1.Bs & clarke1.As