Construction of 3 phase induction motor ppt Equivalent Circuit For An Induction Motor Dec 7, 2022 · The document is a presentation on the construction of a three-phase induction motor. motors, an external starting motor or starting by using exciter may be Apr 11, 2016 · Introduction (contd…) 11-04-2016 A. The rotor, which can have either a squirrel cage or wound configuration, lags slightly behind this magnetic field due to Lenz's law, causing it to rotate at a Nov 4, 2020 · Starting of Induction Motors • When the supply is connected to the stator of a three phase IM, a rotating magnetic field is produced and the rotor starts running. RPM can be changed without gear box. Can safely be operated in hazardous environments. Understand the concept of rotor slip and its relationship to rotor frequency. f. These flux will rotate at a speed called a Synchronous Speed, ns. This rotating field induces currents in the rotor windings which produce a magnetic field and cause the rotor to turn, though at a slightly slower speed than Mar 8, 2024 · Construction of 3 Phase Induction Motor. Almost 80 of the mechanical power used by industries is provided by three phase induction motors because of its simple and rugged construction, low cost, good operating characteristics, absence of commutator The document discusses the three phase induction motor. Jul 10, 2020 · 3. Split phase method: When a motor is provided with two windings, even though these are excited from the same voltage, the currents in the two windings can be made out-of-phase by adjustment of the impedance of the auxiliary winding in relation to the main winding. Therefore, a synchronous motor can be made to carry the mechanical load at constant speed and at the same time improve the power factor of the system. Rotor is of two types (i) wound rotor (ii) squirrel–cage rotor The rotor core is laminated with slots punched for accommodating the rotor winding/ rotor bars. Oct 10, 2020 · It describes that induction motors have a stationary stator and a rotating rotor. If the rotor emf is 120 cycles per minute and torque lost in friction is 50 Nm, determine (a) slip (b) operating speed (c) net power output (d) gross torque (e) power lost due to friction & windage (f) gross power output (g) total power input if total losses are 10 kW Jun 17, 2020 · Power Transfer Stages of Induction Motor • Induction motor converts an electrical power supplied to it into mechanical power. As the name recommends, the stator is a fixed piece of the motor. The principle of operation is explained, where a rotating magnetic field in the stator induces voltage and current in the rotor, generating torque. 11). It discusses the construction of the motor including the stator core and winding, wound rotor with slip rings, and end shields. Introduction Three-phase induction motors are the most common and frequently encountered machines in industry - simple design, rugged, low-price, easy maintenance - wide range of power ratings: fractional horsepower to 10 MW - run essentially as constant speed from no-load to full load - Its speed depends on the frequency of the power source • not easy to have variable speed control Feb 24, 2012 · The three phase induction motor is the most widely used electrical motor. • The 3-phase power input to an induction motor i. motors have brushless excitation systems mounted on their shaft, often these exciters can be used as starting motors • For many medium-size to large syn. Generally cheaper due to absence of brushes, commutators and slip rings. Arrangement of Feb 8, 2021 · • The starting torque of this motor (squirrel cage induction motor) is not less. • The induction motor is a constant speed motor. c motors are called single-phase induction motors. Common rotors are either wound or have a squirrel cage design using aluminum or copper bars. essential to understand how these motors are constructed. ANS – Following factors that determine the direction of rotation of three phase induction motor 1. – wound-rotor: complete set of three-phase windings exactly as the stator. 1 Three-Phase Induction Motor Like any electric motor, a 3-phase induction motor has a stator and a rotor. At starting, the stator winding is connected in star, therefore the applied voltage to each phase of winding is 1/√3 of Three-phase induction motors are the most common and frequently encountered machines in industry - simple design, rugged, low-price, easy maintenance - wide range of power ratings: fractional horsepower to 10 MW - run essentially as constant speed from no-load to full load - Its speed depends on the frequency of the power source Aug 10, 2017 · CONSTRUCTION • A three phase induction motor has two main parts – a stationary stator – a revolving rotor • Two basic design types depending on the rotor design – squirrel-cage: conducting bars laid into slots and shorted at both ends by shorting rings. As a result main m. We use either induction motor principle or a separate starting motor for this purpose. The stator contains windings that produce a rotating magnetic field when powered by a three phase supply. Almost 80% of the motor is a three-phase induction motor among all motors used in industries. c supply is commonly used for lighting purpose in shops, offices, houses, schools etc. Power Stages. Three Phase Induction Motor Construction Engineering Notes Online. It provides some key formulas for induction motors relating supply frequency, pole pairs, synchronous speed, rotor speed, and slip. Phase sequence of Mar 7, 2018 · 2. Lower maintenance. 7 3. , ISM Dhanbad 5 Major parts of Induction Motor: (Like any other electrical motor, induction motor have two main parts namely stator and rotor. Jun 3, 2016 · CONSTRUCTION • An induction motor has two main parts – a stationary stator – a revolving rotor • Two basic design types depending on the rotor design – squirrel-cage: conducting bars laid into slots and shorted at both ends by shorting rings. Nov 19, 2022 · Chapter 3 Learning Objectives At the end of this chapter the students should be able to understand: Understand the construction and working principle of an induction motor. Both the ends are connected with bearings for free rotation means of reduced friction losses. Nov 7, 2011 · Stator has three main parts: Outer Frame – It is the outer body of the of the motor. It describes the basic construction and working principles of each type of motor. Jan 16, 2024 · Document S8 THREE PHASE INDUCTION MOTOR. Almost 80% of the mechanical power used by industries is provided by three phase induction motors because of its simple and rugged construction, low cost, good operating characteristics, the absence of commutator and good speed regulation. • Types of single phase induction motor: Some of the methods used to make an induction motor self starting. It is simple to construct and maintain, with no brush gear. For the application where variable speed requires, this motor is not used. Stator winding – Has a three phase winding. The single-phase motor stator has a laminated iron core with two windings arranged perpendicularly – one is the main and the other is the auxiliary winding or starting winding. The rotor also carries star or delta winding similar to that of stator winding. Jul 12, 2015 · 16. Understand power Nov 4, 2012 · It discusses different types of induction motors including single phase, three phase, squirrel cage, and slip ring rotors. It is housed on the shaft of the induction motor. Nov 11, 2015 · 4. Those induction motors which employ squirrel cage rotor are called squirrel cage induction motors. Most of three phase induction motor use squirrel cage rotor as it has a remarkably simple and robust construction enabling it to operate in the most adverse circumstances. • Motor: – DC motor: Shunt , series, compound motor, PMDC – Induction Motor : SCIM, WRIM (SRIM), Linear Induction motor – Synchronous motor : Wound field, PMSM – BLDC, Stepper motor, SRM • Squirrel Cage Induction Motor: – Less expensive, Robust in construction and less maintenance – Can be A 3-phase induction motor has a stationary stator and a rotating rotor. Three-phase induction motors are commonly used in industry due to their simple and robust design. Rotor Copper Loss. The rotor carrying DC supply also produces a constant flux. Pony motor method • Since starting motor should overcome inertia of syn. The rotor is not insulated from the core. Advantages Simple and rugged in construction. . The rotor can be either a squirrel cage type or wound slip-ring type. Stator Copper Loss. May 20, 2015 · The document discusses the three-phase squirrel cage induction motor. Stator is also provided with a 'starting winding' which is used only for starting purpose. Single Phase Induction Motor Ppt. 2 OVERVIEW OF SINGLE PHASE IM. Stator; Rotor; Stator of 3 Phase Induction Motor. The stator carries a 3-phase winding (called stator winding) while the rotor carries a short circuited winding (called rotor winding). Rotor:- It is the rotating part of the induction motor. At the time of starting the motor slip is unity and the starting current is very large. The construction of a single-phase induction motor is similar to that of a three-phase induction motor. It consists of two main parts, the stationary stator and the rotating rotor. Nov 25, 2016 · 19. However, it suffers from the disadvantage of a low starting torque. Mechanical load is connected on driving end while cooling fan is connected on non-driving end. The stator construction of the three-phase induction motor and the three-phase synchronous motor are almost identical. Disadvantages Draws a lot of current at starting. Q. 5k views • 13 slides Apr 10, 2015 · This is very commonly used starter, compared to the other types of the starters. The stator consists of a frame, core, and winding. It has two ends, one is called Driving end and another is called non- Driving end. There are two main types of rotors - squirrel cage and wound/slip ring. They are composed of a squirrel-cage rotor (identical to that in a 3-phase motor) and a stator. How does a 3- phase motor works • At the moment of start because rotor is stationary therefore field created by rotor current shall be stationary hence no emf shall be induced in stator winding and no back emf, therefore full starting current limited by stator impedance shall flow through the motor stator winding. – wound-rotor: complete set of three-phase windings exactly as the stator Mar 30, 2019 · description of all parts of three phase induction motor 1) stator 2) Rotor 3) stator core 4) Rotor core 5) stator and rotor winding 6) squirrel cage rotor 7) Phase wound rotor Read less Read more 1 of 38 A three phase induction motor consists of a stator with three-phase windings connected in a star or delta configuration. Dec 3, 2024 · Basic Elements of Drive system contd. Only the stator winding is fed from 3-phase supply. of three phase induction motor is made up of numbers of slots to construct a 3-phase winding circuit which we connect with 3 phase AC source. Stator of 3 Phase Induction Motor . stator. The rotor uses a squirrel cage construction with rotor bars short-cut by rings on both sides. •When one coil passes through the region of maximum torque next coil will take its place. Construction of a single-phase induction motor. supply are popularly used. Carries the alternating magnetic field. The construction of an induction motor is exceptionally basic and robust. c motors, the motors which work on single-phase a. Lecture 4. Rotor Losses. Thus, a 3-ϕ IM is self starting. A three phase supply is fed to the stator of induction motor. 1 Oct 10, 2020 · It describes that induction motors have a stationary stator and a rotating rotor. Oct 10, 2020 · It describes that induction motors have a stationary stator and a rotating rotor. It protects the inner part of the machine. When supplied with three-phase power, it produces a rotating magnetic field which induces currents in the rotor. They run at a constant speed from no-load to the full load. • Speed control of this motor is difficult. The rotor of any single phase induction Construction and working of a three-phase induction motor The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. •Coils are connected to commutator segment in such a way that every instant of time each and every coil carries current, but the sides of coil to comes at the left hand side carries current in one direction and the side at right Feb 9, 2014 · 2. Star-delta starter can be used, provided the stator of the 3-Ø induction motor is designed for delta connection during its normal operation. It discusses the two main parts of a three-phase induction motor: the stator and the rotor. Mar 28, 2021 · By understanding the construction and working principle of a three-phase induction motor, you can better understand how it works and be better able to choose the right setup for your application. Slip Ring Induction Motor • Slip ring or wound three phase induction motor : In this type of three phase induction motor the rotor is wound for the same number of poles as that of stator but it has less number of slots and has less turns per phase of a heavier conductor. machine without a load & starting motor can have much smaller rating • since most syn. The . m. Feb 23, 2021 · The rotor flux gets produced due to the principle of induction hence it is called as induction motor. The stator contains laminated iron cores holding 3-phase windings spaced 120 degrees apart. c. Construction - a revolving rotor • composed of punched laminations, stacked to create a series of rotor slots, providing space for the rotor winding • one of two types of rotor windings • conventional 3-phase windings made of insulated wire (wound-rotor) similar to the winding on the stator • aluminum bus bars shorted together at the ends by two aluminum rings, forming a squirrel Jun 21, 2022 · 2. Dec 23, 2014 · 14. They operate by inducing a current in the rotor via a rotating magnetic field generated by a three-phase supply to the stator windings. Pal, EE Dept. Considering the 50 Hz power frequency, from the above relation we can see that the 3 phase rotating flux rotates about 3000 revolutions in 1 min or 50 revolutions in 1 sec. Therefore, these motors are frequently used in industry. • These a. The various stages in this conversion is called as power transfer stages in an induction motor. No contacts on rotor shaft -High Power/Weight ratio compared to Dc motor -Lower Cost/Power -Easy to manufacture -Almost maintenance-free, except for bearing and other mechanical parts •Disadvantages -Essentially a "fixed-speed" machine -Speed is determined by the supply frequency -To vary its speed need a variable frequency supply Example 5. We arrange the Construction of Three Phase Induction Motor ; The three phase induction motor is the most widely used electrical motor. 12). May 6, 2024 · State how you will reverse the direction of rotation of 3-phase induction motor. •This way shaft of rotor always provide higher and smooth torque. It describes the main components as having a stator and rotor. the general principles of 3-phase induction motors. ppt. Motors are enclosed in frames of various materials and designs for cooling and 1 Unit – III Three phase Induction Motor 2 Construction The stator is similar to that of Synchronous machine and is wound for three phases. In three… Jul 25, 2024 · Design of Induction Motors • Design of wound Rotor • These are the types of induction motors where in rotor also carries distributed star connected 3 phase winding • Number of rotor slots: As mentioned earlier the number of rotor slots should never be equal to number of stator slots • Generally for wound rotor motors a suitable value is Œ¡t } Ö¦‘‹d w×è «’Ž®js“M@&¦ƒR¿† f"Ô„zƒPÇòV¬È_ëü ¦Á«Œ~,i£f=¥i‡ÓÂ‡Žñì%5"L0 LÀ º 5”_‰p’ hæ[¨1I ,ö3IÊû KÃ| iiMwó IÚ)u»í 7©‘±pVSu ¸üiO+tŸôØ²E,#»o CöiÕ t[ ,6T œ ©wv~S!&ÏW HD %h8q(j =ÿT+ TSM_P#oið–ç¿ö Ê–¿L" ·Gé6w}á}0; Ñ‚Tq>à=c„]*ÓH€Ã ¦NGHÜÁµ Jan 2, 2020 · Three Phase Induction Motors. Introduction Three-phase induction motors are the most common and frequently encountered machines in industry. It consists of a stator with three windings and a rotor that rotates due to the rotating magnetic field created by the stator windings. Understand and know how to use the equivalent circuit of an induction motor. It is Mar 2, 2020 · The 3 phase stator winding carrying 3 phase currents produces 3 phase rotating magnetic flux. Aug 10, 2016 · Construction of single phase induction motor:- Construction of a single phase IM is similar to 3- phase squirrel cage induction motor. SINGLE PHASE MOTORTo operated on single phase supply and for use in numerous application like ceiling fans, refrigerators, food mixers ect. Usually Y May 6, 2020 · In today post, we will discuss the different types of three phase induction motors with working and applications. This causes the rotor Microsoft PowerPoint - Induction motor PPT for students [Compatibility Mode] Author: PRK Created Date: 4/13/2020 9:58:48 AM The document provides information about induction motors, including: 1. The stator contains windings that produce a rotating magnetic field when powered by a three phase source. 7. Stator Losses. The induction motor especially three phase induction motors are widely used AC motor to produce mechanical power in industrial applications. How the direction of 3 phase induction motor is reversed. 2 OVERVIEW OF May 3, 2016 · 18. Split-phase motors use an auxiliary winding to provide starting torque. A single phase induction motor physically looks similar to that of a three phase induction motor except that its stator is provided with a single phase winding. The rotor used here is same as that used in 3 phase squirrel cage Induction motor and it is very simple in design, robust in construction. L4 – 01. • Hence instead of d. However, their rotors are completely different . Nov 24, 2018 · 3. Aug 22, 2017 · This document summarizes three types of single-phase induction motors: split-phase induction motors, capacitor-type single-phase induction motors, and shaded-pole motors. ELECTRIC MOTOR An electric motor is an electromechanical device that converts electrical energy to mechanical energy. State the method to reverse the direction of rotation of induction motor. c voltage, rotating field is set up • This field produces an EMF in the rotor winding by mutual induction principle, which in turn circulates current when the rotor is short circuited • This current interacts A three-phase induction motor is a type of AC motor that operates on the principle of electromagnetic induction. Single-phase induction motors are very similar to 3-phase induction motors. Three Phase Induction Motors. Stator Core – Built up of high grade silicon steel. Fa constitute an unbalanced field set with 90° electrical space phase Feb 2, 2021 · THREE PHASE INDUCTION MOTOR, Rotating Magnetic Field (RMF), Slip, Construction, Torque-speed characteristics Speed control, Power flow, Equivalent Circuit, Maximum torque - Download as a PDF or view online for free Oct 30, 2015 · 9. e, • Stator input, • Pin = √3 VL IL Cos φ Oct 6, 2011 · Ac motors - Download as a PDF or view online for free. It discusses the basic components and construction of three-phase induction motors, including the stator, rotor, and enclosure. A 3-phase induction motor consists of two major parts: • A stator • A rotor . The motor uses a squirrel-cage rotor, which has a laminated Nov 6, 2019 · 12. ) Stator: As its name indicate stator is a stationary part of induction motor. Based on these techniques, the single phase induction motor 5 Lecture 4 Exercise [1] A A 3 , 50 Hz, 4 pole star connected induction motor on full load develops a useful torque of 300 Nm. 3. Supplying of both main and auxiliary windings enables the single-phase machine to be driven as a two-phase machine. An equivalent circuit model is presented Jun 17, 2020 · 3. But single phase induction motor are not self starting, like DC motors. Introduction • Three-phase induction motors are the most common and frequently encountered machines in industry • simple design, rugged, low-price, easy maintenance • wide range of power ratings: fractional horsepower to 10 MW • run essentially as constant speed from no-load to full load • Its speed depends on the frequency of the power source • not easy to have Apr 11, 2019 · 19. pdf, Subject Mechanical Engineering, from Birla Institute of Technology & Science, Pilani - Dubai, Length: 42 pages, Preview: Three Phase Induction Motor Introduction Construction ontents Rotating magnetic field Working principle Slip and torque Power Jan 1, 2020 · Induction Motors. Construction of Three Phase Induction Motor: A Three phase induction 3. The flux is called as Rotating magnetic Field. 8. Single phase induction motor • Single-phase a. 2. Most common types have a squirrel cage rotor construction with aluminum or copper bars in the rotor slots to conduct the induced currents. • The induction motor has a high starting inrush current. Fm and auxiliary winding m. Introduction Power Stages Additional Exercises Induction Motor Starting Considerations Starting Methods Summary. 540 views • 10 slides Apr 18, 2019 · INTRODUCTION Construction of a single phase induction motor is similar to the construction of three phase induction motor having squirrel cage rotor, except that the stator is wound for single phase supply. Dept of E & E, MIT Manipal. Synchronous motors are generally of the salient pole type. Three-phase induction motors are the most common and frequently encountered machines in industry simple design, rugged, low-price, easy maintenance wide range of power ratings: fractional horsepower to 10 MW run essentially as constant speed from no-load to full load Its speed depends on the frequency of the power source Jan 22, 2013 · Introduction • A poly phase induction motor consists of two major parts, the stator and rotor • When stator is excited with a. Chapter 18 Single-Phase Induction Motors. Speed Control of Three Phase Induction Motor Speed Control From Stator Side Speed control for stator side o By Changing The Applied Frequency F • Constant V/F Control Frequency of applied voltage cannot be varied alone otherwise it will change the flux density in the core and lead to the wastage of energy. The mechanical energy can be used to perform work such as rotating a pump impeller, fan, blower, driving a compressor, lifting materials etc. It has predominantly two sections : Construction of Three-Phase Induction Motor. MZS FKEE, UMP. The induction rotor is made of a laminated cylinder with slots in its surface. When a 3 phase stator winding is connected to a 3 phase voltage supply, 3 phase current will flow in the windings, which also will induced 3 phase flux in the stator. Mar 2, 2024 · 3. Construction similar to 3? induction motor ; A single-phase motor is a rotating machine that has both main and auxiliary windings and a squirrel-cage rotor. Low Jan 5, 2020 · Chapter 18 Single-Phase Induction Motors. A synchronous motor is not self-starting and an auxiliary means has to be used for starting it. 6. Oct 12, 2017 · The document provides details on the design of stator and rotor slots for a 3-phase wound-rotor induction motor. ysd ldt jzdcuf aybk grnpn jyf dewm wjlu pcog bnibn

Construction of 3 phase induction motor ppt. Dec 3, 2024 · Basic Elements of Drive system contd.