We want a four-pole synchronous motor that operates at a speed of 1000 rpm. Determine the frequency of the ac source. List several other speeds that can be achieved by using synchronous motors operating from this ac source. What is the highest speed achievable?

Q: Quèstion 9 The combined losses occuring in armature and field circuit of a DC motor is known as the…

A: The combined losses which occurs in armature winding and field winding are known as winding losses…

Q: (b) List three methods that can be used to control the speed of DC motors. Explain why one of the…

A: NOTE: “Since you have asked multiple question, we will solve the first question for you. If you want…

Q: Q3) Why can't run a (Series - DC motor) without a load??

A: Series motor never started at no load.

Q: Q-1: SPEED CONTROL OF SEPARATELY EXCITED DC MOTOR By field resistance speed control Change the…

A: Need to find new speed

Q: What is the main difference between modern and classical induction motors?

A: Solution Induction Motors are generally utilized as a part of the modern application because of a…

Q: A 240-V-rms 100-hp 60-Hz six-pole delta-connected synchronous motor operates with a developed power…

A: Given Va = 240 Vrms, f = 60 Hz, P = 6 Calculating input power

Q: Draw the torque speed characteristic of separately excited dc motor showing the effect of changing…

A: steps To find the torque-speed characteristic of separately excited dc motor with the effect of…

Q: Name and briefly discuss the types of power loss in a shunt-connected dc motor.

A: The various losses that are present in shunt-connected dc motor are as follows; 1) Copper and…

Q: Briefly explain the construction and operation of a DC Shunt motor.

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Q: Consider a shunt-connected dc motor. What are the names of the two windings? Which is on the stator?…

A: There are two windings in DC motors; Field winding which is used to setting up the magnetic field…

Q: 2-1 Discuss different types of DC motor, Draw equivalent circuit and Torque speed characteristics…

A: Since you have posted multiple different questions. we will solve the first question for you. To get…

Q: DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC MACHINES   Answer these questions based on its…

A: A)  For starting of a synchronous motor a power supply is must needed which supply the power to…

Q: A synchronous motor is running at 100 percent of rated load with unity power factor. If the field…

A: Given: Pdev = Pload ; PF = 1 a) the output power is independent of field current. Hence if the…

Q: (a).i. Describe the construction of a DC generator. ii. Describe the principle of opeartion of a…

A: Hi! Thank you for the question As per the honor code, We’ll answer the first question since the…

Q: (a) Describe two main differences between a DC shunt-wound and separately-excited motor.

A: I am giving difference between shunt motor and separately excited motor.

Q: In examining a single-phase ac motor, what features could we look for to identify it as a universal…

A: First of all, to examine the universal motor, examine the motor's construction means to examine the…

Q: Q.2 a) Why do we use asynchronous word for asynchronous (induction) motors? b) How are the…

A:

Q: Q: I need an Introduction for my report about this experiment : Speed control of seperately Excilted…

A:

Q: (b) (i) Proof that the speed of DC series motor in revolution per minute (rpm) is expressed by R. 30…

A: It is asked to prove the given equation of speed in rpm for a DC series motor. Also we need to…

Q: Derive an expression for armature torque of a dc motor in terms of back emf, armature current and…

A: we need to derive an expression for armature torque.

Q: When drawing the steady state electrical model (for an AC induction motor), is the stator armaturre…

A: Here is the equivalent circuit of Induction motor

Q: Explain in detail the Starting of Induction Motors

A:

Q: Sketch the torque versus speed characteristic for a shunt-connected dc motor. What happens to the…

A: Given:  The torque versus speed characteristic for a shunt-connected dc motor. What happens to the…

Q: Suppose we have a dc motor that produces a back emf of EA=240 V at a speed of 1500 rpm. a. If the…

A: Given data: EA=240 Vnm1=1500 rpmnm2=500 rpm a) If field current is constant then,…

Q: What is a series motor characteristic? For what application it is most suited?

A: we need to explain series motor and its characteristics and its application.

Q: Sketch the torque versus speed characteristic for a series-connected dc motor.

A: The circuit diagram of the DC series motor can be drawn as  Thus for constant power motor : Ns α 1Γ…

Q: A certain shunt-connected dc motor has RA=1 Ω, RF+Radj=200 Ω and VT= At a speed of 1200 rpm, the…

A: Given: A shunt-connected DC motor has RA=1 ΩRF+Radj=200 ΩVT=200 VAt speed Nref=1200 rpmProt=50…

Q: The characteristic (Speed versus armature current) of a dc shunt motor is known as the electrical…

A: Electrical characteristics are the drawn between armature current on X axis and speed on Y axis.

Q: Q5// A: The below curve represents Ta/la characteristic of a dc series motor. Briefly discuss this…

A:

Q: d) What happen to the speed of shunt DC motor if when the field resistance is adjusted to be…

A: Speed of the DC motor is inversely proportional to field flux.

Q: Q / What is the benefit, purpose and conclusions of making single-phase induction motors .?

A: consider  the given question;

Q: A 6-pole, 50 Hz, 3-phase induction motor has rotor resistance and reactance per phase of 0.0 and 0.1…

A: In this question induction motor is given...We have to find out speed for torque maximum..And…

Q: 14) the difference between internal generated voltage and output voltage in synchronous generator…

A: As per guidelines given to us,we can only provide the solution of first question in multiple type of…

Q: A four pole DC shunt motor moves at 1000rpm on a 460v supply when taking an armature current of 45A.…

A:

Q: in the shunt connected DC motor, the equation that calculate field current If is Vf/(Ra+Rf) Va/Ra…

A:

Q: How can the speed of a shunt DC motor be controlled

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Q: 4. What advantage you can obtain from an over excited synchronous motor at no load?

A: Over Excited Synchronous Motor If DC field excitation of  synchronous motor is such that back EMF…

Q: Select the answer Questions: 1. Synchronous motor for power factor correction operates at a. No…

A: 1  we know that synchronous motor acts as synchronous         condensor under over excited…

Q: For a shunt DC motor, if the field circuit is open, what will happen? Why? A series DC motor gives…

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Q: Describe the constant torque and constant power operating states of the DC motor.

A: Constant torque and constant power operating states of the DC motor :- In speed control of DC motor,…

Q: Q4/B/ What are the principal characteristics of a series DC motor? What are its uses? Core

A: There are mainly three principle characteristics of dc series motor  Torque vs armature current :…

Q: The schematic and torque-speed characteristics of a series wound DC motor are shown below : Field…

A: (i)  In a DC series motor the flux is proportional to the armature current, this happens because the…

Q: The rotor resistance and standstill reactance of a 3-phase induction motor are 0.015 Q and reactance…

A:

Q: Explain the speed-current, torque-current and speed-torque characteristics of dc series motor.

A: we need to draw speed current, torque current and speed torque characteristics of dc series motor.

Q: 28/ How can the speed of a shunt dc motor be ontrolled? Explain in detail.

A:

Q: Question 1: Answer all the following parts: a- Discuss the theory of operation of DC motor. b- What…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

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.