Nikola Tesla - Free-Energy Devices

16 INVENTIONS OF NIKOLA TESLA.of its components.These are then respectivelythe sine andcosine of the anglea between* the radius and one of the axes(O X\ Referring to Fig. 11, we have = ,* x? + f where;./ = r cos a,and y = r sin a.Assuming the effect of each set of coils in themagnetizingtransformer to be to the current which proportional may bethen x = KG andadmitted for weak degrees of magnetizationthe current in bothy _ K C^ where ^is a constant and c and c 1sets of coils respectively. Supposing, further, the field of thegenerator to be uniform, we have for constant speed= A" 1 sin ac1sin (90 + = K llcosa) a,where K is a constant.and c = K lSee Fig.12.a?Therefore,= K c K^ cos a;l= K Ky = Kc lsin a; andFIG. 9.That is, for a uniform field the disposition of the two coils atright angles will secure the theoretical result, and the intensityof the shifting poles will be constant. But from ^ = x? -J- >fitfollows that for y = 0, r = x; it follows that the joint magnetizingeffect of both sets of coils should be equal to the effect ofone set when at its maximum action. In transformers and in acertain class of motors the fluctuation of the poles is not of greatimportance, but in another class of these motors it is desirable toobtain the theoretical result.In applying this principle to the construction of motors, twotypical forms of motor have been developed.First, a form havinga comparatively small rotary effort at the start but maintaininga perfectly uniform speed at all loads, which motor has beentermed synchronous. Second, a form possessing a great rotaryeffort at the start, the speed being dependent on the load.