Electromagnetic torque in rotating electrical machinery is present when ________ a) stator winding alone carries current b) rotor winding alone carries current c) air gap is uniform d) both stator and rotor windings carry current
Electromagnetic torque in rotating electrical machinery is present when ________ a) stator winding alone carries current b) rotor winding alone carries current c) air gap is uniform d) both stator and rotor windings carry current
Share
Answer: d
Explanation: Electromagnetic torque = isirdMsr/dθr and if either is or ir = 0, then Te=0.