Problem 2 An actual coil has the properties L = 0.25 H and R = 100Ω....
Problem 2 An actual coil has the properties L = 0.25 H and R = 100Ω. The coil is applied to an alternating voltage of U = 150 V / 100 HZ a) Calculate the impedance and phase angle (186Ω, 57.2o) b) Calculate I (0.81A) c) Calculate the apparent -, active and reactive power (121 W , 65.3 W, 102 VA) capacitor of C = 6.0µF is connected in parallel with the actual coil. d) Calculate the impedance and phase angle (335 Ω, 14.7o) e) Calculate the current (0.45A) f) Calculate the apparent -, active and reactive power (67.4 W, 65.2 W, 17.1 VA) g) Explain with words what effect the capacitor had and why we want this effect.
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Problem 2 An actual coil has the properties L = 0.25 H and R = 100Ω....
The single-phase circuit shown in Figure. 1 is operating at steady-state. R;=1000 G=10F L=0.05 H C...
The single-phase circuit shown in Figure. 1 is operating at steady-state. R;=1000 G=10F L=0.05 H C = 2001F1 ZL.+0.2H R=2002} @va Vs1 V2*10000/10000) M Vs2 V2200Cos(1000+30) M Figure. 1: Single-Phase Circuit 1. Represent the circuit in the phasor domain. Show the impedance value for each passive component of the circuit and the phasor value for each voltage source. 2. Using the circuit in phasor domain calculate the value of each branch current and the complex, apparent, active, and reactive powers...
An L-R-C series circuit L = 0.124 H , R = 245 Ω , and C...
An L-R-C series circuit L = 0.124 H , R = 245 Ω , and C = 7.28 μF carries an rms current of 0.451 A with a frequency of 394 Hz A)What is the phase angle?' F)What is the average rate at which electrical energy is dissipated (converted to other forms) in the capacitor? B)What is the power factor for this circuit? G)in the inductor? C)What is the impedance of the circuit? D)What is the rms voltage of...
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 an...
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...
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of...
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...
15. Calculate the actual rotor speed, in rad/s, at maximum steady-state torque for the machine gi...
Example 6C:
15. Calculate the actual rotor speed, in rad/s, at maximum steady-state torque for the machine given in Example 6C for operation as a motor when connected to an electric source of (a) 120 Hz with twice rated voltage, (b) 60 Hz with rated voltage, (c) 30 Hz with one-half rated voltage, and (d) 6 Hz with 10 percent rated voltage. Example 6C. The parameters for the equivalent circuit shown in Fig. 6.8-1 may be calculated by using electromagnetie...
A three-phase Yy0 connected transformer has a nominal rating of 250 kVA and a voltage ratio...
A three-phase Yy0 connected transformer has a nominal rating of 250 kVA and a voltage ratio 15:0.4 kV. After conducting the short-circuit test, where the secondary winding is short-circuited, it is found that the primary series resistance is 0.08 pu and the primary series impedance magnitude is 0.1pu. The effect of the parallel branch in the transformer’s equivalent circuit may be neglected. Explain what information ‘Yy0’ gives about the transformer. Draw the per-phase equivalent circuit of the transformer during the...
(2 points) Two driven inductors A R = 1 kΩ resistor, a L1 = 20 mH...
(2 points) Two driven inductors A R = 1 kΩ resistor, a L1 = 20 mH inductor and a L2 28 mH inductor are connected in series. A funtion generator drives the circuit with a 5 Vpp variable frequency sine wave. (a) What is the equivalent impedance Zeq of this circuit? O A. R +jwLIL2/(L1+ L2) E. None of these (b) For what angular frequency does |Zoq v2 R? 20833.3 radians/sec (c) What is the peak-to-peak value of the voltage...
The single-phase circuit shown in Figure. 1 is operating at steady-state. R;=1000 G=10F L=0.05 H C = 2001F1 ZL.+0.2H R=2002} @va Vs1 V2*10000/10000) M Vs2 V2200Cos(1000+30) M Figure. 1: Single-Phase Circuit 1. Represent the circuit in the phasor domain. Show the impedance value for each passive component of the circuit and the phasor value for each voltage source. 2. Using the circuit in phasor domain calculate the value of each branch current and the complex, apparent, active, and reactive powers...
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...
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...
Example 6C:
15. Calculate the actual rotor speed, in rad/s, at maximum steady-state torque for the machine given in Example 6C for operation as a motor when connected to an electric source of (a) 120 Hz with twice rated voltage, (b) 60 Hz with rated voltage, (c) 30 Hz with one-half rated voltage, and (d) 6 Hz with 10 percent rated voltage. Example 6C. The parameters for the equivalent circuit shown in Fig. 6.8-1 may be calculated by using electromagnetie...
(2 points) Two driven inductors A R = 1 kΩ resistor, a L1 = 20 mH inductor and a L2 28 mH inductor are connected in series. A funtion generator drives the circuit with a 5 Vpp variable frequency sine wave. (a) What is the equivalent impedance Zeq of this circuit? O A. R +jwLIL2/(L1+ L2) E. None of these (b) For what angular frequency does |Zoq v2 R? 20833.3 radians/sec (c) What is the peak-to-peak value of the voltage...
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