22.a. The maximum torque produced by a split-phase motor is also called the A. full-load torque. B. locked-rotor torque. C. breakdown torque. D. pull-up torque. 22.b. The arrangement which can NOT be used to control the speed of a universal motor operating from a dc circuit is A. a tapped field winding. B. an adjustable external resistance. C. a mechanical governor. D. a solid-state controller.

Q: A 230 V, compensated shunt motor driving a 1220.40 N.m torque load is running at 20 rps. The…

A: Disclaimer:  Since you have asked multipart questions, we will solve the first three subpart for…

Q: 1.a. The large current that a DC motor will draw on start-up is called A. inrush current. B.…

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Q: A 220 V, 7 A, 1100 rpm DC shunt motor has armature and field resistance of 1.75 02 and 250 n…

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Q: A shunt motor has a nameplate rating of 140 hp, 500 V, 205 A, 1700 rpm. The shunt field circuit…

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Q: 20. As load is added to an induction motor... A) Speed will ... a) increase b) decrease c) remain…

A: As per the Bartleby guideline if more than three subparts asked only first three to be answered.…

Q: A 8-kW, 4-pole, 220-V, 50-Hz reluctance motor has a torque angle of 30° when operating under rated…

A: Given data: f=50 Hz (i)The expression for the synchronous speed is given as, Ns=120fP=120×504=1500…

Q: By decreasing the stator voltage of induction motor to 80% of its rated voltage, the maximum torque…

A: Torque is directly proportional to the square of voltage. Let the reduced voltage be V'. Then , V'=…

Q: A 240-V, 900 rpm DC series motor takes 25 A at full load. The armature resistance is 0.20 and the…

A: To solve this problem, we'll use the given data and the fundamental principles of DC motor…

Q: 5.a. A motor which is designed with nonstandard operating characteristics is classified as a A.…

A: Motor:- It converts electrical form of energy into mechanical form of energy. Fans, disk drives,…

Q: Q1. Choose the correct answer: 1- The disadvantage of starting an induction motor with a star-delta…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: Question 8: A terminal voltage for DC shunt motor is 230V and the armature resistance of 1 Q and…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: a) Extract the equation of the voltage induced in the direct current machine and the internal torque…

A: There are mainly three parameters on which the DC machine voltage depends:  Flux ∅ of the machine.…

Q: As load is added to an induction motor... A) Speed will... a) increase b) decrease c) remain the…

A: As mechanical load of induction motor increases, the slip also increases. Hence rotor speed of…

Q: major failure area of a typical wound-field and wound-armature DC motor is A. open field windings.…

A: Due to commutation process there is constant spark generation between commutator segments and…

Q: Example: A d.c. series motor Connected 220V supply takes 50 A at looure 50 A at loo0.P.m to a the…

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Q: x 7) Breakdown torque is...? a. The point at which the rotor loses synchronization The point at…

A: 7 Breakdown torque is ....The point at which the rotor loses synchronization.Explanation - Breakdown…

Q: Consider a 3-phase, 4 Pole, AC induction motor being driven at 75 Hz. Initially, the motor is…

A: Given, number of poles P= 4  frequency f= 75 HzSynchronous speed Ns = 120×fPNs=120×754Ns=2250 rpm

Q: A 240-V, 900 rpm DC series motor takes 25 A at full load. The armature resistance is 0.2 Q and the…

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Q: machine, what should be the case if it is desired to increase the speed of the motor?   -The…

A: A.  The resistance of the field rheostat should be increased to be able to increase the speed of the…

Q: 14.a. The reason for using a laminated stator core in a universal motor is to A. limit the eddy…

A: Iron losses of motor contain hysteresis and eddy current loss. Hysteresis loss depends upon core…

Q: 11. A -hp 1,750-rpm capacitor motor develops 350 per cent starting torque. is the starting torque in…

A: Dear student,Since you have posted multiple questions, we will provide the solution only to the…

Q: A shunt wound de motor has an armature resistance of 2.5N and a shunt field resistance of 1602. The…

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Q: Q2/A synchronous motor having 60 % reactance and a negligible resistance is to be operated at rated…

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Q: 9. The power input to the rotor of a 3-phase, 50 Hz, 6 pole induction motor is 80 kW. The rotor…

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Q: 5. What is the difference between Self Excited and Separately Exited DC motor? 6. We know there are…

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Q: "A 220 V, compensated shunt motor driving a 1084.8 N.m torque load is running at 1000rpm. The…

A: As per the guidelines, we need to solve only first three subparts of given question.       We need…

Q: A switched reluctance motor has salient poles on ..................... a. neither stator or rotor b.…

A: Option B: A switched reluctance motor has salient poles on both the stator and the rotor A Switched…

Q: Q1/ A 380 volts 4 pole 60 Hz three phase star connected induction motor has r,=0, X1=X2=1 N,…

A: The three-phase induction motor is rated at 380V 4 pole 60Hz has fed from the 220V constant voltage…

Q: Explain the principle of operation and constructional features of a three- phase squirrel cage and a…

A: To explain the operation and constructional features of 3-phase squirrel cage and 3-phase wound…

Q: 4. Explain the need, salient features and working with the help of a neat circuit diagram showing…

A: as per the guidelines, we supposed to answer one question at a time so please ask other questions…

Q: A 230 volt d.c. motor withThe armature resistance of the motor is 0.6 ohm. If full load armature…

A: We have been given an DC motor with, Armature resistance (Ra) = 0.6 Ω Full load Armature current…

Q: (480 V DC shunt motor has a starting current I 126 A from the source. Total resistance value of…

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Q: - Three phase induction motor has rating of 50 kW, 960 rpm, 400 V. 50 Hz, 6-pole. The motor…

A: The polarity of the back EMF and armature voltage is not the opposite. As a result, the armature…

Q: a)Explain the speed control methods of direct current motor. b)Compare linear current series motor,…

A: For a) Speed control of a DC motor is either done manually by the operator or by employing an…

Q: 8.A. One characteristic of a typical universal motor is that it A. is usually designed for low-speed…

A: Universal motor is a special motor designed to operate on AC as well as DC supply.   Centrifugal…

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.