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2 poles 1. (36') A 3-phase stator is wounded to haveDraw the stator (2') and the...
You are tasked with designing the stator winding distribution of a three-phase, 60 Hz induction motor, whose rated speed will be 900 rpm. You will have only 36 equidistant stator slots at your disposal to place in conductors.
You are tasked with designing the stator winding distribution of a three-phase, 60 Hz induction motor, whose rated speed will be 900 rpm. You will have only 36 equidistant stator slots at your disposal to place in conductors.(a) Determine and sketch on separate axes the winding distribution of phases a, b and c. Adopt a conductor placement approach that will minimize thegeneration of higher-order harmonics in the rotating magnetic flux wave. Assume you have 132 turns to distribute per phase.(b) Sketch on separate axes the air gap H-field...
Q1 Consider a 24 slot machine. This machine is designed to have 4-poles a) If the...
Q1 Consider a 24 slot machine. This machine is designed to have 4-poles a) If the phase winding 5/6 pitched, draw winding diagram of phase A. b) What is the mechanical angle between the poles of a phase? c) What is the electrical angle between the poles of a phase? d) Calculate the number of coils per phase. e) Each coil has 10 turns. What is the number of turns per phase? f) The phase A current is 5 A....
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...
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...
1 a Determine the synchronous speed of a motor that has a frequency of 60Hz and...
1 a Determine the synchronous speed of a motor that has a frequency of 60Hz and 12 poles. The synchronous speed of a 3-phase, 4-pole induction motor is 60 rev/s. Determine the frequency of the supply to the stator windings. The synchronous speed of a 3-phase induction motor is 25 rev/s and the frequency of the supply to the stator is 50 Hz. Calculate the equivalent number of pairs of poles of the motor. A 6-pole, 3-phase induction motor is...
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...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed of 103 rad/s and a speed regulation of 5% at rated load. Find the amount of slip (in rpm) at full load for this motor. 2.. A 2 HP, 240 VAC, 60 Hz, capacitor-start motor is 75% efficient and draws 10 A at full load. What is this motor's power factor at rated load? 3. A wound rotor, 3 phase induction motor in Mr....
Question 2 [10 marks) A six pole, three phase induction motor, with a star connected stator...
Question 2 [10 marks) A six pole, three phase induction motor, with a star connected stator winding is energised from a 380V, 50Hz supply. The ratio of the stator to rotor turns is assumed 1.8 and a full load slip of 4%. If the respective per phase rotor resistance and standstill reactance are 0.120 and 0.8502, determine: a. Torque developed at full load b. The maximum torque and the speed at maximum torque
4. Consider a stepper motor with two phases. Phase 1 is wound with two identical coils. Phase 2 i...
4. Consider a stepper motor with two phases. Phase 1 is wound with two identical coils. Phase 2 is also wound with two identical coils. Therefore, there are eight wires that come out from the stator winding, four for each phase (a) Connect the phase terminal wires in such a way that the motor can be used as a unipolar wound motor and draw:a schematics for the amplifier circuit of the motor windings (b) Connect the phase terminal wires in...
2. Short Answer (20 points) 1. Please draw the equivalent circuit of a 3-phase asynchronous motor (after winding and...
2. Short Answer (20 points) 1. Please draw the equivalent circuit of a 3-phase asynchronous motor (after winding and frequency conversions), explain the meaning of the resistance in rotor circuit and draw the phasor diagram of the machine. (5 points) Please write down the mathematical model of an asynchronous motor and try to make comparison among the control methods (VVVF, VC & DTC) of asynchronous motor. (5 points) 2. 3. It is known for 3-phase double-layer short-pitch distributed windings that:...
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...
1 a Determine the synchronous speed of a motor that has a frequency of 60Hz and 12 poles. The synchronous speed of a 3-phase, 4-pole induction motor is 60 rev/s. Determine the frequency of the supply to the stator windings. The synchronous speed of a 3-phase induction motor is 25 rev/s and the frequency of the supply to the stator is 50 Hz. Calculate the equivalent number of pairs of poles of the motor. A 6-pole, 3-phase induction motor is...
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...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed of 103 rad/s and a speed regulation of 5% at rated load. Find the amount of slip (in rpm) at full load for this motor. 2.. A 2 HP, 240 VAC, 60 Hz, capacitor-start motor is 75% efficient and draws 10 A at full load. What is this motor's power factor at rated load? 3. A wound rotor, 3 phase induction motor in Mr....
Question 2 [10 marks) A six pole, three phase induction motor, with a star connected stator winding is energised from a 380V, 50Hz supply. The ratio of the stator to rotor turns is assumed 1.8 and a full load slip of 4%. If the respective per phase rotor resistance and standstill reactance are 0.120 and 0.8502, determine: a. Torque developed at full load b. The maximum torque and the speed at maximum torque
4. Consider a stepper motor with two phases. Phase 1 is wound with two identical coils. Phase 2 is also wound with two identical coils. Therefore, there are eight wires that come out from the stator winding, four for each phase (a) Connect the phase terminal wires in such a way that the motor can be used as a unipolar wound motor and draw:a schematics for the amplifier circuit of the motor windings (b) Connect the phase terminal wires in...
2. Short Answer (20 points) 1. Please draw the equivalent circuit of a 3-phase asynchronous motor (after winding and frequency conversions), explain the meaning of the resistance in rotor circuit and draw the phasor diagram of the machine. (5 points) Please write down the mathematical model of an asynchronous motor and try to make comparison among the control methods (VVVF, VC & DTC) of asynchronous motor. (5 points) 2. 3. It is known for 3-phase double-layer short-pitch distributed windings that:...
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