Stator Flux Estimation of Induction Motor in real time

Hi,

I am using TMS320F28379D LAUNCHPad for implementation of induction motor control and code is generated from MATLAB2019b.

for this i have to estimation of stator an rotor flux in alpha,beta frame.

i am using Eq.

but output of integration of voltage quantity is not in sin shape and it is continuously decreasing in nature however input quantity is sinusoidal in nature.

how i can debug this kind of problem?

please provide any solutions for this?

Thanks in advanced