What type of motor changes speed by changing the number of stator poles

Q: Question No. 25 A three-phase, three-stack, variable reluctance step motor has 20 poles on each…

A: here we have to find the step angle of the step motor .

Q: What happens to a series connected direct current motor if its field winding opens at full load?

A: DC Series motor :- In DC series motor, there are two windings, "armature winding & series…

Q: Why not self starting induction motor?

A: Induction motor- An induction motor is an electric motor that works on the method of electromagnetic…

Q: When a d-c motor is tested by the electrical input method, the field rheostat is adjusted to give A.…

A: Above question is based on DC motor, the major classification of DC motor are Series motor Shunt…

Q: In an AC Motor, what is the function of a slip ring commutator?

A: We will refer the concept of slip ring commutator

Q: why automatic re-closers are not recommended in a system where large numbers of induction motors are…

A: Automatic Re-closer It is a protective switch-like circuit breaker designed to operate at a very…

Q: Complete the wiring diagrams as per Worksheets 6-A and 6-B then solve for "A" through "K" for the DC…

A: Given Input voltage V =125 V Input current I = 16 A Armature resistance Ra =0.3 Ω Shunt field…

Q: 5. Consider a causal & stable LTI system whose input x[n] and output y[n] are related as; y[n] -yln…

A: To solve this question we use DTFT and inverse DTFT .

Q: In a single phase motor what happens if power is lost to your unit while it was operating? When…

A: Single phase motor is mostly used in domestic works. The working of single phase motor is easy than…

Q: 4- What is the effect of saturation on speed and torque?

A: When the frequency drops the V/Hz is high. This means that the motor needs a larger magnetic type of…

Q: s the following correct? True or false? If the rotor of the asynchronous motor is reversed in the…

A: A 3-ϕ asynchronous motor's rotational direction can be reversed by switching any two of the three…

Q: Why induction motor cannot run on synchronous speed? Explain using slip.

A: In an engine, simultaneous speed is the speed at which the attractive field pivots. Contingent upon…

Q: Synchronous motor when the load is taken completely while working at full load in all properties…

A: Synchronous motor is constant speed motor always rotates at synchronous speed Ns =120fP

Q: lue increase as the torque value increases?

A: An asynchronous motor is also known as an induction motor. A three-phase balanced supply is provided…

Q: What is the effect of changing the speed of one of the generators?

A: When the speed of the generator is increased the frequency of the generator increases. Hence to…

Q: how is a generator cooled?

A: The generator is a device that converts mechanical energy into electrical energy. While conversion…

Q: conditions to builds voltage in dc generators ?

A: To build up voltage in DC generators, 1. There should be residual magnetism in the machine.

Q: hen the armature current of a 220 Volt DC shunt motor is 40 Amperes, when the magnetic flux suddenly…

A:

Q: 6. What Will Happen If The Direction Of Current At The Terminals Of A D.c Motor Is Reversed?

A:

Q: If the field current of a shunt wound d.c. motor is halved, what effect will this have on the speed?…

A: Dc shunt motor is a constant flux motor.Asked to find the speed when the field current is reduced by…

Q: Q: The cumulative compound dc motor can give a high starting torque .why?

A: A cumulative compounds motor is that which when the shunt field flux made by the shunt winding aids…

Q: the different kinds of AC motors? Explain each on

A: Classification of AC motors- 1) based on Principle of Operation:      A)Synchronous Motors Plain…

Q: DC/AC MOTOR (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. NO LONG EXPLANATIONS…

A: The detailed solution is provided below.

Q: Indicate whether the following statements are true or false and correct the false statements are…

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

Q: By looking at which part of the motor, it can be easily confirmed that a particular motor is a DC…

A: In this question we need to choose a correct option

Q: The following constants are for a(1/4) - hp 60-Hz 115-V four-pole capacitor-start motor: r1 =…

A:

Q: What two benefits do reactors in motors have?

A: Two benefits of reactors in the motor is given  below: 1)Reactors protects, motor and its control…

Q: What is the rotor copper loss of a 3-phase 550 Volt, 50 Hz, 6 poles induction motor developing 4.1…

A: Given a 3-phase 550 Volt induction motor with, Number of poles, P = 6 Rotor power = 4.1 kW Shaft…

Q: A 460V, 25 hp [1 hp = 746 watts], 60 Hz, four-pole, Y-connected induction motor has the following…

A: As per guidelines given to us we can only provide the solution of first three subpart in multi part…

Q: Q1- For the stepper motor shown in the figure Draw the drive circuit? If this stepper motor has a 3°…

A: Stepper motor has a rotor movement in discrete steps. Rotor moves in discrete steps to perform…

Q: Does increasing the number of magnets increase the speed of the D.C motor? Explain

A: In this case, the effects of an increasing number of magnets on the speed of a DC motor need to be…

Q: Is the synchronous motor works on the principle of magnetic attraction? TRUE or FALSE

A: Yes, synchronous motor works on the principle of magnetic attraction or magnetic locking.

Q: Which of the following type of induction motor torque and slip can be changed easily? a. Non Salient…

A: In this question , we will write about induction motor in which torque can be changes easily....

Q: A 400 V, four pole, 50 Hz induction machine runs at 1425 rpm. The machine is Y-connected and the…

A:

Q: A 4-phase variable reluctance stepping motor is shown in the diagram below. The stator

A:

Q: Question: Which motor can correct its speed when unexpected load is happen Servo Motor Stepper Motor…

A: Given that  Which motor can correct its speed when unexpected load is happen

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.