What is a servo motor and how does it work?

1 Answer

Answer :

It is a simple electrical motor that is operated by AC or DC signal in order to provide a precise angular motion for a given electrical signal.

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Description : State working principle and applications of servo motor.

Last Answer : Working Principle of Servo Motor: Basically servo motor is made up of DC motor, which is controlled by a potentiometer and some gears. Its angle of rotation is controlled by the duration of ... Packaging 6) Woodworking 7) Textiles 8) Printing 9) Robotics 10) Portable drilling 11)Process control 

Description : Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) ... than that of a normal induction motor (D) may be less or greater than that of a normal induction motor

Last Answer : C

Description : What is the job of a servo in a transmission?

Last Answer : servo motor use in many types mechanism so its verius type of transmission wich type you need to know 

Description : Which of the following motors is being extensively used in servo applications ? A. AC motor B. Field controlled dc motor C. Armature controlled dc motor D. None of these

Last Answer : Which of the following motors is being extensively used in servo applications ? A. AC motor B. Field controlled dc motor C. Armature controlled dc motor D. None of these

Description : State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.

Last Answer : Modifications are necessary in a dc series motor so that it operates satisfactorily on ac supply. The modifications are as follows:  1) AC series motor is built with a few field turns as ... and grinders 5) High speed vacuum cleaners 6) Sewing machines 7) Food processors 8) Drilling machine 

Description : How does a single phase induction motor work?

Last Answer : As we know that single phase induction is not self started because for self started we require atleast two revolving field but single phase induction motor has only one. So we provide extra ... 1phase IM classified as split phase IM, capacitor start capacitor run, capacitor start induction run.

Description : How does a PSC motor work?

Description : Define servo system. Draw the block diagram of DC Servo System.

Last Answer : Definition: Servo system is defined as automatic feedback control system working on error signals giving the output as mechanical position, velocity or acceleration.  1) The servo system consists of error ... , DC motor, DC gear system and the DC load whose position is to be changed. 

Description : For a 2nd order servo system, the damping ratio δ = 0.5456 and undamped natural frequency is ωn = 31.6 rad/sec. The percent overshoot is  (a) 7.07 (b) 10.2 (c) 14.10 (d) 21.21

Last Answer : For a 2nd order servo system, the damping ratio δ = 0.5456 and undamped natural frequency is ωn = 31.6 rad/sec. The percent overshoot is 14.10

Description : The time constant of the servo-mechanism can be decreased by

Last Answer : The time constant of the servo-mechanism can be decreased by decreasing the inertia of the system

Description : Which type of motor would you recommend for using in a steel mill and on an electric vehicle? Explain your answer

Description : Mc Master Motor

Last Answer : The McMaster motor is based on the principle of the rotary engine. The McMaster motor is the centerpiece of a totally new way of looking at motorized transportation which involves the ... McMaster motor will be considerably cheaper to operate once its unique fuel sources are commercially developed.

Description : DC MOTOR MCQ

Last Answer : 101. Which of the following loss in a D.C. generator is dissipated in the form of heat? (a) Mechanical loss (b) Core loss (c) Copper loss (d) All of the above Ans: d 102. Which of the following ... (b) does not run as a generator (c) also runs as a motor comes to stop after sometime Ans: a

Description : What is the purpose of Overload Protection in a motor circuit?

Last Answer : Ans. The Overload Protection is used in a motor circuit to protect it from sustained over currents.

Description : What is a motor?

Last Answer : Ans. Motor is a machine which converts electrical energy into mechanical energy.

Description : What is Motor Brake ?

Last Answer : The most commonly used brakes are friction brakes. They work on the principle that friction can be used in converting the mechanical energy of an object in motion into heat energy. This ... with an electronic motor brakes. These brakes are also suitable for power-generating machines like windmills.

Description : Write the steps to rewind an electric motor

Description : MCQ on Motor Control Center

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Description : Explain how cooling is achieved in pipe ventilated type during motor enclosures

Description : Explain the necessity of starter for D.C. motor. State various types of D.C. motor starter. 

Last Answer : Necessity of Starter for D.C. Motor: Armature current is given by equation Ia = (V−Eb)/Ra i) If the motor is at standstill or rest, back emf Eb is zero (as Eb= ZNP/(60A), at start speed N ... . Types of D.C. motor starters: i) Two point starter ii)Three point starter iii) Four point starter

Description : State at least one function and the material used for the following parts of DC Motor.

Last Answer : Part Function Material Yoke -Provides mechanical support for poles -Acts as protecting cover for machine -Provides path for magnetic flux Cast Iron OR Cast Steel Field Winding - ... Pole core  Provides mechanical support to field winding. Cast Iron OR Cast Steel

Description : Explain the working principle of induction motor. 

Last Answer : Working principle of induction motor: * When the motor is excited with three-phase supply, three-phase stator winding carries three-phase currents & produces a rotating magnetic field of constant magnitude and ... , which tend to move the rotor in the same direction as the rotating magnetic field. 

Description : State the insulating materials used in motor. Write temperature class and withstand temperature ranges for them. 

Last Answer : The insulating materials used in motor are as belows: 1. Cotton, 2. Silk, or paper, 3. Press board, 4. Resins 5. PVC 6. Cellulose-Fiber, 7. Enameled coating, etc  ... Over 180° Mica, porcelain, ceramics, glass quartz, asbestos, treated glass fiber or treated asbestos. etc.

Description : List different starting methods of three phase synchronous motor. Explain any one of them.

Last Answer : Different Starting Methods of Three Phase Synchronous Motor: As synchronous motor is not self starting, different methods of starting are as follows: 1) By using an Induction (Pony) motor 2) ... . The rotor gets pulled into synchronism and starts running at constant speed as a synchronous motor. 

Description : Draw and explain V and inverted V curves for synchronous motor.

Last Answer : V curves' and inverted V curves' for Synchronous Motor:  V curve:  V curve is a plot of the stator current versus field current for different constant loads. The graph is plotted ... Vcurves of synchronous motor. The highest point on each of these curves indicates unity power factor.

Description : Explain the activities carried out during weekly maintenance of 3 ph. Induction motor. 

Last Answer : Activities Carried out During Weekly Maintenance of 3 ph. Induction Motor:  1) Check belt tension. In cases where this is excessive it should immediately be reduces and in the case of sleeve ... and cooled by oil mist systems its important to check the oil mist flow paths/pressure components.

Description : Describe with neat sketch working of hysteresis motor.

Last Answer : Working: When stator is energized with single phase ac supply, rotating magnetic field is produced because of starting (auxiliary) and main windings, which remain in circuit permanently. The ... the principle of magnetic locking this motor either rotates at synchronous speed or not at all.

Description : List applications of stepper motor.

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Description : List different torques in synchronous motor. 

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Description : State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders

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Description : State the function of following parts in Induction motor. (i) Stator (ii) Slip rings

Last Answer : Name of part Function Stator 1) Stator frame supports the core, terminal box and protects the inner parts. 2) Stator core houses stator winding. 3) Stator winding ... ) Provides facility to connect external resistance to rotor circuit through brushes for starting and control.

Description : List the energy conservation technique in induction motor. 

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Description : With a neat sketch give the working of shaded pole induction motor.

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Description : List the main parts of D.C. motor

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Description : List different types of stepper motor. State one application of stepper motor.

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Description : Write two applications of D.C. series motor. 

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Description : State the principle of operation of d.c. motor.

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Description : DC motor gross torque example

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Description : DC shunt motor

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