Induction (Asynchronous) Machines

The slip frequency can be used to design the motor using Opera-2d/AC and Opera-3d/ELEKTRA-SS. Analysing over the range of frequencies between 0 Hz and supply frequency gives the torque vs. speed characteristic.

Voltage driven modeling is normally required and this gives the important current v speed characteristic. Non-linear solutions are vital for these machines, especially when closed rotor slots are present. The non-linear material option in Opera-2d/AC and Opera-3d/ELEKRA-SS gives good results. Iron loss may also be important and the complex permeability option will provide a first order approximation for this.

The rotating modules Opera-2d/RM and Opera-3d/CARMEN allow the effect of rotor and stator slotting, distributed windings etc. to be fully considered.

For more information on induction machine design within Opera or the machines environments please visit our applications site at: motor-design-software.com