This paper presents the analytical and numerical methods for computing synchronous motors with salient pole rotor without damper winding for industrial drives. The entire industrial drive system and its requirements considering the motor calculation accuracy are described in detail. This result is of paramount importance for the daily motor design and optimization of the entire system. The obtained results of the described fast analytical calculation algorithm are compared against the corresponding results of the in terms of CPU-time more demanding field simulation based numerical algorithm (FEM). This comparison reveals some limitations of the analytical approach compared to the field simulation based numerical methodology.