(11%) Problem 2: The winding of an AC electric motor has an inductance of 29 mH...
An electric motor with a resistance of 15Ω and an inductance of 53 mH is connected to a 60.0 Hz ac generator. Part A: What is the power factor for this circuit? Express your answer using two significant figures. Part B: In order to increase the power factor of this circuit to 0.80, a capacitor is connected in series with the motor and inductor. Find the required value of the capacitance. Express your answers using two significant figures. Enter your...
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°.
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of Xs = 4.56 Ω and an armature-to-field mutual inductance, Laf = 150 mH. The motor is operating at rated speed and terminal voltage and at an output power of 35kW. Neglecting losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Eaf and field current I if the motor is operating at (a) 0.9 power factor lagging (b) unity...
A capacitor is connected across an ac source that has voltage amplitude 59.0 V and frequency 750 Hz Part A What is the phase angle o for the source voltage relative to the current? Express your answer in degrees. 190 AED ? - Submit Request Answer Part B Does the source voltage lag or lead the current? O lag O lead Submit Request Answer Part What is the capacitance of the capacitor if the current amplitude is 5.50 A ?...
A three phase 460 volt AC induction motor draws a current of 40 amperes, and has a power input of 28 kW. What is the power fac- tor of the motor?
Problem #2 You have a 1000 W electric motor connected to a 200 Vms, 60 Hz source, and the resulting power factor is 0.8 lagging. (Hint: Based on the units, is power rating of the motor real power or apparent power?) a. What is the voltage in terms of a phasor? b. By how many degrees does the current lag the voltage? c. What is the RMS current drawn by the motor? d. What is the current in terms of...
1. L RC Circuit. An AC circuit has an inductance L -5 mH, a resistance of 8.5 Ohms, and a capacitance of 1 mF. It is driven by a sinusoidal signal at a frequency of f 100 Hz. Calculate (a) the inductive reactance, XL: (b) the capacitive reactance Xc: (c) the magnitude of the impedance Z: (d) the resonant frequeney in Hertz, and (e) the phase of the resulting current.
An inductor with L = 9.40 mH is connected across an ac source that has voltage amplitude 44.0 V . A) What is the phase angle ϕ for the source voltage relative to the current? B) Does the source voltage lag or lead the current? C) What value for the frequency of the source results in a current amplitude of 4.00 A ?
A 600 ? resistor and a 260 mH inductor are connected in series with an ac generator with an rms voltage of 24.0 Vand a frequency of 55.0 Hz . What is the rms current in this circuit? Units of answer must be in mA.
a) A coil having resistance of 12 2 and an unknown inductance is connected in series with a 14uF capacitor. The circuit draws maximum current when a voltage of 200 V at 60 Hz is applied. A second capacitor is then connected in parallel to the circuit. i) What should be its value (capacitance), such that the combination acts like a non- inductive resistance, with the same voltage (200V) at 120 Hz? [3.0 marks] ii) Calculate the supply current drawn...