So I decided to take a brake from electronics, and get back to physics of synchronous machines, or alternators if you will. A great deal of help was mr. jim hardy, trying to explain the alternator in the intuitive way. And so he succeed. I got the basics right. Now I want to tackle some more physics about it. So we have a stator and a rotor. http://pokit.org/get/e919530b23e3274b923d0063cf13fb01.jpg [Broken] Blue-from rotor Red-from stator Black-resulting all flux or mmf I believe that this represents the rotor, but "unwrapped"? I want to talk about torque angle. The picture shows the case where we have a resistive load. This means current will produce a field exactly pi/2 ahead of the rotor field, am I correct? This means that the field of the rotor is always perpendicular to the field of the stator? Does this mean that the δ=pi/2? Or the torque angle? OR is the torque angle, the angle between, rotor field and the RESULTING field? I have tons of more questions, but lets settle this for now.