Advanced Search

Question: RE: re-writing a differential equation

Question:RE: re-writing a differential equation

pik1432 245 Maple 2020
October 27 2020
1

Hello there, 

Would you please tell me how to re-write the 'PMSM_v_eq' as 'PMSM_flux_eq_desired'? My simple attempt was using the 'solve()' command, but it failed. 

Here is the worksheet:


 

> 

restart;
> 

PMSM_v_eq := V__alphabeta(t) = R__s * i__alphabeta(t) + L__s*diff(i__alphabeta(t), t) + diff(lambda__alphabeta(t), t);

V__alphabeta(t) = R__s*i__alphabeta(t)+L__s*(diff(i__alphabeta(t), t))+diff(lambda__alphabeta(t), t)

 (1)
> 

 

> 

PMSM_flux_eq := solve(PMSM_v_eq, lambda__alphabeta(t));

Error, (in solve) cannot solve expressions with diff(lambda__alphabeta(t), t) for lambda__alphabeta(t)

  
> 

PMSM_flux_eq_desired := lambda__alphabeta(t) =  int(V__alphabeta(t) - R__s * i__alphabeta(t), t) - L__s*i__alphabeta(t);

lambda__alphabeta(t) = int(V__alphabeta(t)-R__s*i__alphabeta(t), t)-L__s*i__alphabeta(t)

 (2)
> 

 


Thank you!

Download PMSM_eq.mw
Please Wait...