3.a. Which one of the following motor types uses permanent magnets in the armature or rotor? A. Stepper motor B. PM motor C. Pancake motor D. PM servo motor 3.b. A type of resistance device that can be placed in a DC motor circuit and varied to limit the speed of a motor is called a A. power resistor. B. rheostat. C. potentiometer. D. variable reluctor.

Q: 22/ What is the armature current value of the DC motor at starting of the Motor?  a. less than 10…

A: To start a dc motor we need high current. As initally the volatge is very small in dc motor.

Q: Rotor eccentricity can be caused by A. high motor loads. B. excessive voltage. C. poor motor…

A: A rotor eccentricity is a condition of unequal air gap that exists between the stator and the rotor.…

Q: What is the name of the speed control by varying the field current of the DC motor? O a. None of the…

A: Because the field current produces the flux, and if we control the field current then the speed can…

Q: d.c. shunt motor has the armature and field resistance is 0.010 and 50 Q, when the input power is 60…

A: In this question dc shunt motor is given....We have to find out total armature power developed...

Q: 25. When a no-load test is conducted in an induction motor, what would happen to its circuit? a. the…

A: Given date ,  Testing of induction motor  About No load test and blocked rotor test. We know slip =(…

Q: Draw developed diagram for a progressive simplex lap winding d.c motor, 12 slot and 4-poles. Show:…

A: Step 1: Step 2: Step 3: Step 4:

Q: 4. Differentiate the types of DC Motor through: a. Schematic Diagram or Circuit Diagram. b. Voltage…

A: Types of DC Machine Separately excited DC Machine  Self excited DC Machine  Shunt DC Machine…

Q: 100 A. If the motor developing half the torque. Choose the correct answer. Tal armature resistance…

A:

Q: . a)Briefly explain ‘armature reaction’ and its effect with the help of a suitable diagram.…

A: Armature reaction is the effect that armature field is made in main field. Or we can say that it is…

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

A:

Q: Q 2) A d.c. shunt motor has the armature and field resistance is 0.012 and 50 Q, when the input…

A:

Q: The factors effecting the speed of dc motor are The flux p and the voltage across the armature the…

A:

Q: enclosure used in DC motor

A: Conductor- Materials which have free electrons in valence which can flow when comes under any…

Q: Interpoles in a DC motor must be

A: Interpoles in a DC motor must be series excited and should have the same polarity as that of the…

Q: Q2) A d.c. shunt motor has the armature and field resistance is 0.012 and 50 Q, when the input power…

A: This question belongs to electrical machine . It is based on the concept of armature power developed…

Q: Which statement is not correct about induction motor Select one: O a. The squirrel-cage rotor is the…

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

Q: A shunt motor is connected to line with 110V and rotating with 2000 r/min. Line current is 40A.…

A: This question belongs to electrical machine . It is based on the d.c. shunt motor . Motor converts…

Q: Q2 A DC shunt motor is connected to a 220 V supply. Figurel below shows the time/current…

A: Armature Resistance is 0.12 ohms. 1) The maximum current through the armature at the instant of…

Q: Describe the constructional features and characteristics, of a induction motor that would be used in…

A: to describe the constructional features and characteristics, of a induction motor that would be used…

Q: a. The back-EMF generated by a DC motor is greatest when the motor is a) standing still b) running…

A: Back EMF of DC motor is directly proportional to the speed of the motor. Losses is occurs in field…

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: Please answer all subparts please answer in typing format

A: Step 1: Step 2: Step 3: Step 4:

Q: Where is field winding mounted in a DC machine? a) Stator b) Rotor c) Absent d) Anywhere on stator…

A:

Q: DC Shunt Motor Question 1: A DC shunt motor with an armature resistance of 0.15 is supplied from 230…

A: A DC shunt motor- Armature resistance Ra=0.15 ohm, Voltage V=230 V, Back emf Eb=200 V, To Find- The…

Q: determine "A" through "G" for the DC motor on worksheet 5 when it is running at capacity and its…

A:

Q: 3- What is the function of a commutator in the DC motor?

A: DC motor converts electrical energy into mechanical energy.

Q: The armature resistance of a 250 V D.C. shunt motor is 0.5 Ω. The minimum and maximum current during…

A:

Q: How does change in resistance affect the speed of a DC motor? A. Increasing the armature resistance…

A:

Q: Question 3/ A 220-volt d.c. shunt motor is running at a speed of 800 r.p.m. and draws 100 A. If the…

A:

Q: 3. The armature of a 120 volts DC motor has resistance of 1.5 ohm and takes 4 ampere when operating…

A:

Q: A four-pole DC shunt motor, 220 V, the number of conductors in the armature 1000, the typical…

A:

Q: 7. The main purpose of the commutator in a DC Generator is to a. provide smoother output c. convert…

A:

Q: Q2 A DC shunt motor is connected to a 220 V supply. Figurel below shows the time/current…

A: A DC shunt motor with armature resistance of 0.12 Ohm is fed with a 220 V supply. It is started…

Q: Question 3:7 Discuss improvements that could be made to both motors. *Discuss improvements that…

A: An electric motor (sometimes known as the electrical motor) is a mechanism that transforms…

Q: Explain briefly the AC, DC and Universal motors

A: AC Motors: In an AC motor, there is a hoop of electromagnet arranged across the outer side (forming…

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.