Question

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The inductances of two mutually coupled coils are: L A L and L2L B cos 0, where A and B 2. - are constants. The windings are both connected to two source currents i1 and i (a) Derive an expression for the electromagnetic torque as a function of , i, and i (b) Find the developed electromagnetic torque for i and i, 0 (c) Find the developed electromagnetic torque for i, il (d) Find the developed electromagnetic torque for i Im sin ox and i lo (e) () Find the developed electromagnetic torque for ii Im sin ox (ii) Find the value(s) of speed a at which the machine will develop an average torque if t- (ii)Find the maximum torque and power (mechanical) that could be developed by the machine at each speed. ( ) Find the developed electromagnetic torque for i m sin ax and i-m cos (ii) Find the value(s) of speed o at which the machine will develop an average torque if 0 - (iii)Find the maximum torque and power (mechanical) that could be developed by the machine at each speed (b) Find the developed electromagnetic torque for i, and coil 2 is short-circuited.

Answer 1

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