Learning Forum

[sree-ranjini.kizhakkethil-swaminathan]

I am getting negative torque for EESM 3D simulation in Maxwell.  How to rectify ?

[DELI]

hi, could you provide more information of your machine? is this a synchronous machine?

[Viswanath Yenumula]

Hello DELI, 

yes , we are using Externally excited synchronous machine(EESM). Initially, we simulate the model using- maxwell 2D. Now we are trying to compute same machine using 3D with same excitation patterm, same current values, same advance angle. in 2D i am getting positive torque, but in 3d i am getting negative torque for the same operating point condition

[DELI]

There might be some difference between 2D and 3D model, could you check the current direction, rotation direction and rotating axis?

[Viswanath Yenumula]

Hello Deli, 

Thanks for the reply. I have one more doubt. How to calculate the initial position angle of EESM.  Is it similar to PMSM machine or different one