Homework Answers
**The rotating magnetic field will not be generated in this case .
This is because as per RMF Field theory of induction motor , the motor will develop Rotating field only when There is displacement of " 360/Poles " angle .
So , for Rotating field we will need to have " 360/4 = 90° " displacement but in question we are given only 45° , so No rotating magnetic field is possible here .
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Q2. B. In a two-phase, 4-pole machine, the two windings are displaced 45 mechanical degrees in...
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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....
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has t...
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has the following parameters per phase refereed to the stator. RI : 0.29 Ω , R2 0. 14 Ω , Xi-0.50 Ω , X2-0.20 Ω , Xm-1 0.53 Ω The total windage and core losses can be assumed to be a constant 350 W. If the machine is operating at rated voltage and frequency with a 5.5% slip, find the steady-state: (a) 10pts. Mechanical...
please solve the multiple choices [17-18-19-20] (a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical in...
please solve the multiple choices [17-18-19-20]
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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.
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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. Machine Overview. Please answer the following questions. Note: this is to test your comprehension of the basic concepts covered in class. For a DC Machine and Synchronous Machine: Name the...
1. Machine Overview. Please answer the following questions. Note: this is to test your comprehension of the basic concepts covered in class. For a DC Machine and Synchronous Machine: Name the two winding types for synchronous and de machines a. Identify which type of winding is used to control torque b. Of the winding types, which is wound on the stator? c. DC Machine: Synchronous Machine: nsidering the combined air gap MMF for the following machines, indicate which has rotating...
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...
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3.1 When two four pole, 50 Hz synchronous generators are paralleled their phase displacement is 2...
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Q2: Time (30 minutes) A. Your friend Shawn draw the two equipotential surfaces a & b...
Q2: Time (30 minutes) A. Your friend Shawn draw the two equipotential surfaces a & b (shown below) as part of his class project in PHYA21. IDV -10V Comment on these two diagrams if they are physically acceptable? When appropriate, try to help him by drawing the electric field on graphs. B. To demonstrate the effect of a dielectric on capacitors you quickly filled the space between the capacitor plates by an insulator while it is still connected to the...
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has the following parameters per phase refereed to the stator. RI : 0.29 Ω , R2 0. 14 Ω , Xi-0.50 Ω , X2-0.20 Ω , Xm-1 0.53 Ω The total windage and core losses can be assumed to be a constant 350 W. If the machine is operating at rated voltage and frequency with a 5.5% slip, find the steady-state: (a) 10pts. Mechanical...
please solve the multiple choices [17-18-19-20]
(a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical input power are adjusted so that the machine delivers 15 k W at 0.9 lagging power factor. Is it a generator or motor? Draw the per- phase equivalent circuit of machine. (c) Determine the excitation voltage and the power angle (degree) Problem 1. (10 Points) A 3-phase, 20 kVA, 460...
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. Machine Overview. Please answer the following questions. Note: this is to test your comprehension of the basic concepts covered in class. For a DC Machine and Synchronous Machine: Name the two winding types for synchronous and de machines a. Identify which type of winding is used to control torque b. Of the winding types, which is wound on the stator? c. DC Machine: Synchronous Machine: nsidering the combined air gap MMF for the following machines, indicate which has rotating...
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...
2.3 (20 points) A separately-excited de motor is mechanically coupled to a three-phase, 4-pole, 30-kVA, 460-V, round-rotor synchronous generator. The de motor is connected to a constant 230-V de supply The ac generator is connected to a 460 V, fixed-voltage, fixed-frequency, three-phase supply. The synchronous reactance of the synchronous generator is 513 Ω/phase. The armature resistance of the de motor is 30 m2. The 4-pole de machine is rated 30 kW at 230 V. All unspecified losses are to be...
3.1 When two four pole, 50 Hz synchronous generators are paralleled their phase displacement is 2 mechanical. The synchronous reactance of each machine is 10 n/phase and the common busbar voltage is 66kV. Calculs the s cho nisimlengud AN 2 A synchronous generator has a synchronous impedance of 2p and a resist ance of 0.01 p.u. It is connected to an infinite busbar of voltage 1 pu. through a transformer of reactance 01 pou. If the generated (no-load) emfis 1.1...
Q2: Time (30 minutes) A. Your friend Shawn draw the two equipotential surfaces a & b (shown below) as part of his class project in PHYA21. IDV -10V Comment on these two diagrams if they are physically acceptable? When appropriate, try to help him by drawing the electric field on graphs. B. To demonstrate the effect of a dielectric on capacitors you quickly filled the space between the capacitor plates by an insulator while it is still connected to the...
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