the rotor of a motor is laminated ?

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Manojponduru answered 2 years ago

The rotor in a certain electric motor is a flat, rectangular coil with 89 turns of...

The rotor in a certain electric motor is a flat, rectangular coil with 89 turns of wire and dimensions 2.57 cm by 4.20 cm. The rotor rotates in a uniform magnetic field of 0.800 T. When the plane of the rotor is perpendicular to the direction of the magnetic field, the rotor carries a current of 10.6 mA. In this orientation, the magnetic moment of the rotor is directed opposite the magnetic field. The rotor then turns through one-half revolution....

•The rotor impedance at standstill of a three-phase, Y-connected, 208-V, 60Hz, 8-pole, wound-rotor induction motor is...

•The rotor impedance at standstill of a three-phase, Y-connected, 208-V, 60Hz, 8-pole, wound-rotor induction motor is 0.1 + j0.5 Ω/phase. •Determine the breakdown slip, (0.2) the breakdown (maximum) torque, (458.37 Nm) and the power developed by the motor at maximum torque (34.6kW). •What is the starting torque of this motor? (176.3 Nm) •Determine the resistance that must be inserted in series with the rotor circuit so that the starting torque is 50% of the maximum torque. (0.034Ω)

A shunt-wound DC motor with the field coils and rotor connectedin parallel (see the figure)...

A shunt-wound DC motor with the field coils and rotor connected in parallel (see the figure) operates from a 135 V DC power line. The resistance of the field windings,, is 248Ω. The resistance of the rotor,, is 4.60Ω. When the motor is running, the rotor develops an emf ε. The motor draws a current of 4.94 A from the line. Friction losses amount to 47.0 W.A) Compute the field current .= ? AB) Compute the rotor current .= ? AC) Compute...

a) What is the advantages of using a wound-rotor type of induction motor? Under what conditions?...

a) What is the advantages of using a wound-rotor type of induction motor? Under what conditions? b) When starting a wound rotor induction motor, what is the supposed value of resistance of the slip-ring starter? c) What is the wound rotor method of speed control?

Describe the following terms of an electrical motor and the its use. 1. Core 2. Rotor(shaft)...

Describe the following terms of an electrical motor and the its use. 1. Core 2. Rotor(shaft) 3. Commutator 4. Slots 5. Windings 6. End bell 7. Cooling Fan 8. Motor Housing 9. Terminal Box 10.End bell with connections

a. For an induction motor, differentiate between synchronous speed, rotor speed and slip speed. b. State...

a. For an induction motor, differentiate between synchronous speed, rotor speed and slip speed. b. State the two basic types of construction used for the rotors of induction motors. Which is the most rugged and explain why. c. Draw full equivalent circuit for one phase of an induction motor with all parameters labelled and named. d. Draw and explain power flow diagram of 3 phase induction motor. e. Mention four (4) components of induction machine. Explain briefly the function of...

A three-phase asynchronous motor with squirrel cage rotor is available with: Voltage: 230/400 V Frequency: 50...

A three-phase asynchronous motor with squirrel cage rotor is available with: Voltage: 230/400 V Frequency: 50 Hz Number of Poles: 10 In addition, the following parameters of the equivalent circuit are known: R1 = 0.5  X1 = 3  R´2 = 0.8  X´2 = 3.5  Mechanical losses are considered to be negligible and the parallel branch of the equivalent circuit. 1. Draw the approximate equivalent circuit of the motor without the branch in parallel. 2. Indicates the...

The parameters of a 3-phase, 4-pole, 50 Hz, Y-connected, wound-rotor induction motor are listed below. These...

The parameters of a 3-phase, 4-pole, 50 Hz, Y-connected, wound-rotor induction motor are listed below. These are the default values of the “Asynchronous Machine” model in MATLAB Simulink. r1=0.5968 ?; r2=0.6258 ?; L1=0.0003495 H; L2=0.005473 H; Lm=0.0354 H; Stator line voltage = 400 V rms. The motor for rotor speeds nm= 0 to 1500 rpm. X1= 0.1097 ohm, X2= 1.719 ohm , Xm= 11.12 ohm, RTH = 0.5853 , XTH = 0.1395 and VTH = 230.82 V. Suppose the motor...

A 3 phase 6 pole, asynchronous AC motor stator resistance 0.34 ohms rotor resistance 0.12 ohms...

A 3 phase 6 pole, asynchronous AC motor stator resistance 0.34 ohms rotor resistance 0.12 ohms stator inductance of 0.5H rotor inductance of 0.2H magnetizing inductance 12.35 a)Draw the equivalent electrical circuit for this motor for 1 phase b) is slip s=0.3 find the speed, torque, current at the stator and efficiency if the voltage supply is 240V per phase at 70 Hz with a Wye connection

The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.59 m...

The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.59 m and 1.01 m, respectively. The respective rotational speeds are 453 rev/min and 4129 rev/min. Calculate the speeds of the tips of both rotors. m/s (main rotor) m/s (tail rotor) Compare these speeds with the speed of sound, 343 m/s. (vmain rotor / vsound) (vtail rotor / vsound)

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