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11. In a sinusoidal permanent magnet AC motor, stator current space vector is controlled for maximum...
1. A four-pole three-phase permanent-magnet ac motor ha5% 4Q, Lss 0.01 H. The motor is operating ...
1. A four-pole three-phase permanent-magnet ac motor ha5% 4Q, Lss 0.01 H. The motor is operating with aヶ= 146 rad/s and the initial rotor angle θ,(0) = 0. The applied phase-A voltage and current are vas 10cos(wrt), and las cos(wt - 20°). Calculate the rotor permanent-magnet flux Ă,n and the motor torque Te, and input power Po (Hint: Po-: 3 asrmslasrn scos(8,-0,). Answer:m-0.0393 V s/rad, Te0.111N m, Pe 14.1W].
1. A four-pole three-phase permanent-magnet ac motor ha5% 4Q, Lss 0.01...
3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a...
3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a current of 50 A when the speed is 1500 r/min when the armature is connected to a source of 48 V, calculate the following: a) The induced emf, EA, and the torque, T, produced at this speed. b) The motor speed, n (in rpm), when the torque is 2 Nm. c) The armature current at 1600 r/min. d) The torque at 1600 r/min. e)...
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...
Stator winding stator axis rotor axis ܕ݁ܐܶ RU in L rotor V.RO 0 0.= initial position...
Stator winding stator axis rotor axis ܕ݁ܐܶ RU in L rotor V.RO 0 0.= initial position of the rotor at standstill (rest position) a) Schematic view of SPPMSM b) Electrical equivalent circuit of SPPMSM Description of the motor: In Fig. a, cross-section of a Single Phase Permanent Magnet Synchronous Motor (SPPMSM) is seen. A U shaped stator is wound with a stator winding consisting of two coils connected in series (you can consider a single coil with N turns). A...
The speed of a separately excited de motor is controlled by a one-phase full-wave converter. The field circuit is also controlled by a full-wave converter and the field current is set to its maximum...
The speed of a separately excited de motor is controlled by a one-phase full-wave converter. The field circuit is also controlled by a full-wave converter and the field current is set to its maximum value. The AC supply voltage to the armature and field converters is one-phase, 400V, 50Hz. The armature resistance Ra 0.232, the field circuit resistance Rf- 1812, and the motor voltage constant is Kv 1.3V/A - rad/s. The armature current corresponding to the load demand Ia 42A...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure 4. The de motor armature inductance can be assumed large enough such that any motor curent ripple is negligible. (a) Assuming negligible supply reactance, show that the average rectifier output voltage V, in tems of the supply ms voltage E and the firing angle a, is given by 2/2E (6 marks) cos a _ (b) Given that the supply voltage is 230V, 50HZ and...
Question 4 (Could be considered as Quiz 3- 4.5 pts). An armature-controlled DC motor of figure...
Question 4 (Could be considered as Quiz 3- 4.5 pts). An armature-controlled DC motor of figure below has the following characteristics: Ra=1.2 ohms, L. - 0, KT = 0.06 N-m/A (motor-torque constant), K = 0.06 V-s/rad (back-emf constant). It has maximum speed of 500 rad's with a maximum current of 2 A. We suppose that all possible frictions are represented in friction torque Tr=0.012N-m. R: armature resistance, 2 La armature inductance, H is : armature current, A is: field current,...
1. A seperately excited DC motor operating from a single phase half controlled bridge at a...
1. A seperately excited DC motor operating from a single phase half controlled bridge at a speed of 1400rpm, has an input voltage of 33 sin 314t and a back emf of 80V. TheSCRs are fired symmetrically at an angle of 30 deg in every half cycle and the armature has a resistance of 4ohms. Calculate the average armature current and the motor torque.
2. Suppose you have a AC motor built from the design below. The square metal wire...
2. Suppose you have a AC motor built from the design below. The square metal wire between the magnets has a side length of.05 magnetic field of magnitude 2 tesla, and that the motor is connected to a 10 ohm resistor via a circuit. meters. Assuming that the permanent magnets create a constant a. If the circuit is connected to an alternating voltage source, then (ignoring the back emf), what will the peak voltage of the voltage source have to...
Can you please answer both (d) and Question - 5. (d) The equivalent circuit parameters of...
Can you please answer both (d) and Question - 5.
(d) The equivalent circuit parameters of the motor in (a), at 50Hz, are: R; = 1.50; X;= X, = 40; R = 20; and Xx = 1000 If the motor is to develop its maximum torque at standstill, calculate the output frequency and voltage (RMS) from the inverter, if the air-gap flux remains constant. [6 marks) Question 5 A 4-pole 3-phase, 50 Hz, Y-connected, non-salient pole synchronous motor has the...
1. A four-pole three-phase permanent-magnet ac motor ha5% 4Q, Lss 0.01 H. The motor is operating with aヶ= 146 rad/s and the initial rotor angle θ,(0) = 0. The applied phase-A voltage and current are vas 10cos(wrt), and las cos(wt - 20°). Calculate the rotor permanent-magnet flux Ă,n and the motor torque Te, and input power Po (Hint: Po-: 3 asrmslasrn scos(8,-0,). Answer:m-0.0393 V s/rad, Te0.111N m, Pe 14.1W].
1. A four-pole three-phase permanent-magnet ac motor ha5% 4Q, Lss 0.01...
3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a current of 50 A when the speed is 1500 r/min when the armature is connected to a source of 48 V, calculate the following: a) The induced emf, EA, and the torque, T, produced at this speed. b) The motor speed, n (in rpm), when the torque is 2 Nm. c) The armature current at 1600 r/min. d) The torque at 1600 r/min. e)...
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...
Stator winding stator axis rotor axis ܕ݁ܐܶ RU in L rotor V.RO 0 0.= initial position of the rotor at standstill (rest position) a) Schematic view of SPPMSM b) Electrical equivalent circuit of SPPMSM Description of the motor: In Fig. a, cross-section of a Single Phase Permanent Magnet Synchronous Motor (SPPMSM) is seen. A U shaped stator is wound with a stator winding consisting of two coils connected in series (you can consider a single coil with N turns). A...
The speed of a separately excited de motor is controlled by a one-phase full-wave converter. The field circuit is also controlled by a full-wave converter and the field current is set to its maximum value. The AC supply voltage to the armature and field converters is one-phase, 400V, 50Hz. The armature resistance Ra 0.232, the field circuit resistance Rf- 1812, and the motor voltage constant is Kv 1.3V/A - rad/s. The armature current corresponding to the load demand Ia 42A...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure 4. The de motor armature inductance can be assumed large enough such that any motor curent ripple is negligible. (a) Assuming negligible supply reactance, show that the average rectifier output voltage V, in tems of the supply ms voltage E and the firing angle a, is given by 2/2E (6 marks) cos a _ (b) Given that the supply voltage is 230V, 50HZ and...
Question 4 (Could be considered as Quiz 3- 4.5 pts). An armature-controlled DC motor of figure below has the following characteristics: Ra=1.2 ohms, L. - 0, KT = 0.06 N-m/A (motor-torque constant), K = 0.06 V-s/rad (back-emf constant). It has maximum speed of 500 rad's with a maximum current of 2 A. We suppose that all possible frictions are represented in friction torque Tr=0.012N-m. R: armature resistance, 2 La armature inductance, H is : armature current, A is: field current,...
2. Suppose you have a AC motor built from the design below. The square metal wire between the magnets has a side length of.05 magnetic field of magnitude 2 tesla, and that the motor is connected to a 10 ohm resistor via a circuit. meters. Assuming that the permanent magnets create a constant a. If the circuit is connected to an alternating voltage source, then (ignoring the back emf), what will the peak voltage of the voltage source have to...
Can you please answer both (d) and Question - 5.
(d) The equivalent circuit parameters of the motor in (a), at 50Hz, are: R; = 1.50; X;= X, = 40; R = 20; and Xx = 1000 If the motor is to develop its maximum torque at standstill, calculate the output frequency and voltage (RMS) from the inverter, if the air-gap flux remains constant. [6 marks) Question 5 A 4-pole 3-phase, 50 Hz, Y-connected, non-salient pole synchronous motor has the...
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