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The figure opposite is a schematic of a three-phase synchronous machine with a cylindrical rotor If the stator windings are powered by three-phase currents below do
(Question 1): (4pts) A three-phase, 2300-V, 60-Hz, 10-pole, A-connected cylindrical rotor synchronous motor has a synchronous reactance of 4.0 82/phase. The armature resistance may be neglected. It is connected to 2300-V source and drives a system with its excitation set to give a PF of 0.9-leading when the power is 500-kW. (a) Sketch the phasor diagram of this motor. (b) Calculate the armature current. (c) Calculate the excitation voltage and torque angle. (d) If the load torque is increased by...
Demonstrate that a three-phase balanced set of current wound in a three-phase machine stator (phases separated by 120 degrees) produces a rotating electromagnetic field of constant amplitude. Show all work please without skipping any steps
Be detailed please A three-phase y-connected 2300 V, 60 Hz round-rotor synchronous motor has a synchronous reactance of 2 ohms/ phase and negligible armature resistance. 2. If the motor takes a line current of 350 A operating at a leading pf of 0.8. calculate the armature voltage and the power angle. If the motor is operating on load with a load angle of-20%, and the excitation is adjusted so that the armature voltage is equal in magnitude to the terminal...
1- The following experimental data belong to a three-phase synchronous motor, which is being powered by a three-phase voltage source of 208 V. The current I1 is the magnitude of the stator line current (in amperes), while the current I3 is the DC excitation current in the rotor winding (in amperes). The readings of the method of the two wattmeters are identified by W1 and W2 (in watts). Calculate the actual input power Pse to the motor in watts (W),...
Show all steps Chapter 4, Problem 28P (1 Bookmark) ON Figure 4.41 shows in cross section a machine having a rotor winding f and two identical stator windings a and b whose axes are in quadrature. The self-inductance of each stator winding is Laa and of the rotor is Lff. The air gap is uniform. The mutual inductance between a stator winding depends on the angular position of the rotor and may be assumed to be of the form where...
Problem 3 (25p) A 120-V, 60-Hz, three-phase, Y-connected, 6 poles, wound-rotor, synchronous motor has a synchronous reactance of 3 ohms. The motor takes a current of 10 A at 0.8 pf leading when operating at a certain field current. The load is gradually increased until the motor develops its maximum torque while the field current is held constant. Determine: a) The new line current b) The power factor c) Torque developed by the motor
Consider a three-phase, 2-pole induction machine. Neglect the stator winding resistance and the leakage inductance. The rated voltage is 217V (line-line, rms) at 60 Hz. Lm65mH, and the peak flux density in the air gap is 0.89T. Consider that the phase-a voltage reaches its positive peak at wt-0. Assuming that the rotor circuit is somehow open circuited, calculate the position(angle) of the magnetizing current space vector ims at wt-4g°.
e connected, 60 Hz, 2300 volt, sik pole, cylindrical rotor synchronous motor is 8 leading, neglect losses, the synchronous reactance is 2.5 sand Fp ohm/phase. Determine: (a) Synchronous speed-n, (b) Developed torque in Horsepower Tmec (c) Active Power-P (d) Apparent Power-S (e) Reactive Power-Q (f) Draw the Power Triangle (g) Armature current-1 (h) Excitation voltage-Et (i) Power Angle-8 U) Draw the phasor diagram e connected, 60 Hz, 2300 volt, sik pole, cylindrical rotor synchronous motor is 8 leading, neglect losses,...
The figure below shows two wires carrying currents of I = 4.85 A in opposite directions, separated by a distance d. Assume d = 7.7 cm. The figure below shows two wires carrying currents of I = 4.85 A in opposite directions, separated by a distance d. Assume d 7.7 cm. Р. .-d- (a) Find the magnitude (in pT) and direction of the net magnetic field at a point halfway between the wires. magnitude рт -Select direction (b) Find the...