Homework Answers
Add Answer to:
Problem 8: Is the armature wiring for an AC generator usually placed in the stator or rotor? (cir...
QUESTION 2 The voltage of an AC generator is controlled by? Increasing or decreasing the field...
QUESTION 2 The voltage of an AC generator is controlled by? Increasing or decreasing the field current Increasing or decreasing the armature current The number of slip rings QUESTION 3 The frequency of an AC generator is unknown. We know the number poles which 6 and we know the speed n which is 1200rpm. What is the frequency? 602. 50Hz 1200HZ QUESTION 4 The frequency of an AC generator is unknown. We know the number poles which 6 and we...
1. The armature of an ac generator is a circular coil with 292 turns and radius...
1. The armature of an ac generator is a circular coil with 292
turns and radius 4.6 cm. When the armature rotates at 939 rpm, the
amplitude of the emf in the coil is 21.3 V. What is the strength of
the magnetic field (assumed to be uniform)?
2. The armature of an ac generator is a rectangular coil 27.0 cm
by 17.9 cm with 294 turns. It is immersed in a uniform magnetic
field of magnitude 3.0 T. If...
Problem 1: A four pole, 60Hz, 3-d synchronous generator has a rotor radius of 15 cm, a rotor length of 2.7m, and an air gap length of 2 mm. The rotor field winding consists of 1000 turns with a wi...
Problem 1: A four pole, 60Hz, 3-d synchronous generator has a rotor radius of 15 cm, a rotor length of 2.7m, and an air gap length of 2 mm. The rotor field winding consists of 1000 turns with a winding factor of 0.962. The Δ connected armature winding has 25 series turns per phase with a winding factor of 0.935. The generator is designed to achieve rated open-circuit voltage at a peak air-gap flux density of 1.25 T (a) At...
Problem 2: 50pts To monitor the rotation speed of a shaft, a generator motor attachment has...
Problem 2: 50pts To monitor the rotation speed of a shaft, a generator motor attachment has been suggested. Here a permanent magnet motor, shown below, is directly attached to the shaft. Stator (magnet) Armature winding Bearing Power supply Brush Commutator Rotor A voltmeter is connected to the power supply connection and is calibrated for various voltage-rpm values. a) Determine the governing equations for this system. (use the motor rotation as the input and the voltage generated as the output) b)...
QUESTION 8 When connecting any electrical AC generator to an electrical grid, the frequency, phase, and...
QUESTION 8 When connecting any electrical AC generator to an electrical grid, the frequency, phase, and voltage of the generator's final electrical output must match that of the grid. ○True ○ False QUESTION 9 As discussed in class, Inverters convert AC power to DC and Rectifiers convert DC to AC. Both are used in fully-rated power electronics in wind turbines to convert power from the stator and DC generator to the correct voltage and phase of the grid. O True...
1) The armature of an ac generator is a rectangular coil 2.00 cm by 6.00 cm...
1) The armature of an ac generator is a rectangular coil 2.00 cm by 6.00 cm with 80 turns. It is immersed in a uniform magnetic field of magnitude 0.250 T. If the amplitude of the emf in the coil is 22.0 V, at what angular speed is the armature rotating? _______rad/s 2) The magnetic field between the poles of an electromagnet is 3.30 T. A coil of wire is placed in this region so that the field is parallel...
Problem 1 (25 points) The parameters of a 6-pole, 2-phase, permanent-magnet ac machine are: 10mH =...
Problem 1 (25 points) The parameters of a 6-pole, 2-phase, permanent-magnet ac machine are: 10mH = 2Ω,4,-1 mH, Lm,- Calculate the angular rotor velocity wrm and the electrical angular velocity wr. (4 points) [Update: use part (i) for the operating condition.] (i) s given that the open-circuit phase voltage is sinusoidal with a peak-to-peak value of 40 V, when the device is driven at 1200 r/min. Calculate λ,n, (8 points) Alternatively-when the stator windings of the permanent-magnet ac machine are...
help!!!! What is the rated velocity and mechanical output power of the rotor? Velocity_1500 Power =...
help!!!!
What is the rated velocity and mechanical output power of the rotor? Velocity_1500 Power = h. r/min 186.4 3. Calculate the rotor slip velocity (in r/min) from procedures 6, 8, 9, 10 and 11. (slip velocity synchronous velocity slip (6) = slip (9) slip (11)-- rotor velocity). (5) r/min slip (8)- r/min r/min slip (10) r/min r/min 6. Couple the DC motor/generator to the wound-rotor motor with the timing belt. Turn on the power supply, Keep the variable output...
Chapter 23, Problem 07 A capacitor is connected across an ac generator whose frequency is 1000...
Chapter 23, Problem 07 A capacitor is connected across an ac generator whose frequency is 1000 Hz and whose peak output voltage is 160 V. The rms current in the circuit is 3.2 A. (a) What is the capacitance of the capacitor? (b) What is the magnitude of the maximum charge on one plate of the capacitor? Note: The ac current and voltage are rms values and power is an average value unless indicated otherwise. + 99 V sin 20...
I've already solved other problems except (d). Although I cannot understand (d). Please solve (d) and...
I've already solved other problems except (d). Although I
cannot understand (d). Please solve (d) and give me a detailed
explanation.
--------------------------------------------
This is the real problem. I posted a wrong problem. please
solve this problem. sorry.
What are the instantaneous and time-averaged torque under this condition? 4.30 Figure 4.42 shows in schematic cross section a salient-pole synchronous machine having two identical stator windings a and b on a laminated steel core. The salient-pole rotor is made of steel and...
QUESTION 2 The voltage of an AC generator is controlled by? Increasing or decreasing the field current Increasing or decreasing the armature current The number of slip rings QUESTION 3 The frequency of an AC generator is unknown. We know the number poles which 6 and we know the speed n which is 1200rpm. What is the frequency? 602. 50Hz 1200HZ QUESTION 4 The frequency of an AC generator is unknown. We know the number poles which 6 and we...
1. The armature of an ac generator is a circular coil with 292
turns and radius 4.6 cm. When the armature rotates at 939 rpm, the
amplitude of the emf in the coil is 21.3 V. What is the strength of
the magnetic field (assumed to be uniform)?
2. The armature of an ac generator is a rectangular coil 27.0 cm
by 17.9 cm with 294 turns. It is immersed in a uniform magnetic
field of magnitude 3.0 T. If...
Problem 1: A four pole, 60Hz, 3-d synchronous generator has a rotor radius of 15 cm, a rotor length of 2.7m, and an air gap length of 2 mm. The rotor field winding consists of 1000 turns with a winding factor of 0.962. The Δ connected armature winding has 25 series turns per phase with a winding factor of 0.935. The generator is designed to achieve rated open-circuit voltage at a peak air-gap flux density of 1.25 T (a) At...
Problem 2: 50pts To monitor the rotation speed of a shaft, a generator motor attachment has been suggested. Here a permanent magnet motor, shown below, is directly attached to the shaft. Stator (magnet) Armature winding Bearing Power supply Brush Commutator Rotor A voltmeter is connected to the power supply connection and is calibrated for various voltage-rpm values. a) Determine the governing equations for this system. (use the motor rotation as the input and the voltage generated as the output) b)...
QUESTION 8 When connecting any electrical AC generator to an electrical grid, the frequency, phase, and voltage of the generator's final electrical output must match that of the grid. ○True ○ False QUESTION 9 As discussed in class, Inverters convert AC power to DC and Rectifiers convert DC to AC. Both are used in fully-rated power electronics in wind turbines to convert power from the stator and DC generator to the correct voltage and phase of the grid. O True...
Problem 1 (25 points) The parameters of a 6-pole, 2-phase, permanent-magnet ac machine are: 10mH = 2Ω,4,-1 mH, Lm,- Calculate the angular rotor velocity wrm and the electrical angular velocity wr. (4 points) [Update: use part (i) for the operating condition.] (i) s given that the open-circuit phase voltage is sinusoidal with a peak-to-peak value of 40 V, when the device is driven at 1200 r/min. Calculate λ,n, (8 points) Alternatively-when the stator windings of the permanent-magnet ac machine are...
help!!!!
What is the rated velocity and mechanical output power of the rotor? Velocity_1500 Power = h. r/min 186.4 3. Calculate the rotor slip velocity (in r/min) from procedures 6, 8, 9, 10 and 11. (slip velocity synchronous velocity slip (6) = slip (9) slip (11)-- rotor velocity). (5) r/min slip (8)- r/min r/min slip (10) r/min r/min 6. Couple the DC motor/generator to the wound-rotor motor with the timing belt. Turn on the power supply, Keep the variable output...
Chapter 23, Problem 07 A capacitor is connected across an ac generator whose frequency is 1000 Hz and whose peak output voltage is 160 V. The rms current in the circuit is 3.2 A. (a) What is the capacitance of the capacitor? (b) What is the magnitude of the maximum charge on one plate of the capacitor? Note: The ac current and voltage are rms values and power is an average value unless indicated otherwise. + 99 V sin 20...
I've already solved other problems except (d). Although I
cannot understand (d). Please solve (d) and give me a detailed
explanation.
--------------------------------------------
This is the real problem. I posted a wrong problem. please
solve this problem. sorry.
What are the instantaneous and time-averaged torque under this condition? 4.30 Figure 4.42 shows in schematic cross section a salient-pole synchronous machine having two identical stator windings a and b on a laminated steel core. The salient-pole rotor is made of steel and...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago