Hello everyone Im new on the forum and I just discovered what are sync machines... I have really basic question what I still cannot figure out.. I did some experiments with motor for different field currents and torques. In the result I measured armature currents and did V curves. But next question asks to do find theoretical solution for same problem. As I guess, torque related to the power through sync speed and power related to I armature as I=P/(Va*cos(theta)). However it doesnt work for me and Im pretty lost. Maybe someone can give me at least direction where and what I should read about.. I have air gap voltages, open and short circuit charachteristics and different input torques and calculated different sync inductance values for open loop voltages. Machine is 400v 0.8kW cos=0.75 50Hz 4 poles 1500rpm.