3 Phase Induction Motor Construction



4 Construction of single phase induction motor The construction parts on of single phase induction motor consist of main two parts: stationary stator and revolving rotor. Induction AC Motor. The stator is stationary part of the motor and the rotor is the rotating part of this motor. Three phase induction motor Single Phasing of Induction Motor The single phasing of three phase induction motors forms the most common hazard to motor operation, because of the possibility of overheating and burning-out of the motor under this condition. This maintains the speed regulation and efficiency of dc. •Three phase induction motors are very popular, because of their simple, robust construction and high reliability. They run at a constant speed from no-load to the full load. The speed control of induction motor is done at the cost of decrease in efficiency and low electrical power factor. The stator carries a 3-phase winding and is fed from a 3-phase supply. Three Phase Induction Motors: The three-phase induction motor is further classified into two types namely squirrel cage motor and slip ring induction motor. The windings are supplied by a balanced three phase a. CHAPTER 3 CONSTRUCTION AND SPEED CONTROL OF THREE PHASE INDUCTION MOTOR 3. The three phase windings are displaced from each other by 120 o. If you want to get the three phase induction motor then get in touch with us at https://bit. It may be constructed for single phase, three phase or even poly phase motors. He built the first such facility, and gave it first into. supply and they are classified into synchronous, single phase and 3 phase induction, and special purpose motors. An induction motor essentially consists of two main parts: stator and. The rotor carries a three phase star or delta connected, distributed winding, wound for same number of poles as that of stator. 1 shows the construction of three phase induction motor. The main construction of induction motor is composed of two parts - stator and rotor. three phase induction motor,single phase motor, emf equation , torque eqn , theory of operation ,circuit diagram – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. 3 Phase Induction Motor, Workshop Tools and Engineering Machines, Workshop Lab Equipments India Manufacturers, Engineering Workshop Lab Machines Manufacturers and Exporters Engineering Lab Equipments. These are of two types, squirrel cage and slip ring motors. It requires little maintenance and has a reasonable overload capacity. Start the three phase induction motor via star-delta connection using Contactors, Start and reverse the direction of the three phase induction motor via star-delta connection using contactors THEORY An induction motor is one in which alternating. The rotor is separated from the stator by a small air-gap which ranges from 0. Starters for 3-phase squirrel-cage induction motors often use star-to-delta converters. If so, could you please explain why one is more efficient than the other. The speed control of induction motor is a crying need for the real world industrial applications. The commutator, which is the heart of any DC machine, is built in-house to ensure quality, accuracy and reliability. Open the catalog to page 21. So try these two. 3 Three-phase motors ranging from 1 to 250 hp. In case of 3-Phase Induction motors due to this reason they are called Self-starting motors as the RMF is naturally produced as soon as we provide a 3-Phase supply, which doesn’t happen in case of 1-Phase induction motors and we will discuss it latter that why 1-phase induction motors are not self-starting and how do they rotate. 3-phase AC induction motors For industrial and mining applications, 3-phase AC induction motors are the prime movers for the vast majority of machines. It is mainly for electrical and Y series of coordinated series of electromagnetic brake YEJ three-phase asynchronous motors. Stator Stator is a fixed part of induction motor, consisting of stator iron core, stator windings andmotor frame. This RMF cuts the rotor bars (Fig:2B). Study in conjunction with Len Gould's text. The permanent magnet design motor is perhaps the most common among several types of stepper motors. Most Industrial electric motors are equipped by three phase Induction motor. 75 HP, 3-phase induction motor. Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, reliable and economical. Large industrial motors are 3-phase. Basic types of an AC Motor. A single-phase induction motor needs a starter configuration to provide the starting torque while a 3-phase motor can be inherently self-starting as the different phases can be manipulated to start the rotor moving. An induction motor can therefore be made without electrical connections to the rotor. Such motors have shunt speed characteristics i. And in the previous article on Types of Electrical Motors, we have classified Induction Motors based on the type of rotor used. In general, they are employed when three-phase power is not available. As the name implies, it adds permanent magnets to the motor construction. Similar to other types of electric machines, a three-phase induction machine can work as a generator and as a motor. shunt motor can be changed smoothly just by using rheostats. They have speeds ranging from 900 to 3600 rpm in 60 Hz and from 750 to 3000 rpm in 50 Hz applications. Normally induction motor has two main parts which are stator and rotor. The rotor of a three-phase squirrel cage Induction motor consists of a set of non-insulated bars that are interconnected by short-circuit rings. Slip is the ratio between the slip speed and synchronous speed. Induction motors are generally two types as we see in the previous article. Squirrel cage induction motor, 2. 3 phase induction motor is the most prevalent in the industrial world today. Basic types of an AC Motor. A high-efficiency three-phase induction motor, on the other hand, helps you drive a machine or equipment like compressor, Centrifugal pump, gear reducer efficiently and save labor cost!. class hz rated ambient nema design 40oc efficiency 1/2 load % 88. Beginningwith the highestvalueof. • The basic idea of an electric motor is to generate two magnetic fields: rotor magnetic field and stator magnetic field and make the stator field rotating. The simplified equivalent circuit allows us to calculate the operating parameters for an induction motor. The motor is controlled using 3-phase inverter. What is the Three Phase induction motor Working Principle? Like any electric motor, a 3-phase induction motor has a stator and rotor. Three-phase is more efficient and economical and is provided to industrial sites for heavy-duty equipment with three-phase motors. Examples are found in washing machines, refrigerator compressors, bench grinders, and table saws. Construction of the Three Phase Asynchronous Motor (Webcast). This fault is categorised as a mechanical fault. The slip ring induction motor could be used for industrial wires where variable speed and high starting torque are prime requirements. 2 (b)] and is fed from a 3-phase supply. 75kW, 415 V, 4- pole, 3-phase Squirrel Cage Three Stator Winding Induction motor has been designed, fabricated and tested. The equivalent circuit of the single-phase induction motor. Slip ring induction motor or wound induction motor or phase wound induction motor Squirrel cage Rotor: The rotor core is a cylindrical laminated iron core , with slots around core carrying rotor conductors. The electric motor has its name derived from the fact that the rotor assemble resembles the wheel of a squirrel's cage. When three-phase is needed but only single-phase is readily available from the electricity supplier, a phase converter can be used to generate three-phase power from the single phase supply. The induction motor stator resembles the stator of a revolving field, three phase alternator. The stator carries a 3-phase winding (called stator winding) while the rotor carries a short-circuited winding (called rotor winding). com offers 306 3 phase induction motor construction products. 3 Design Description of the proposed Three phase Induction Motor with Written Pole Technology: 0. 85 PF lagging. pptx 3 Motor Construction Stator Stator - magnetic structure (iron core) and winding that create magnetic field. Different Types of duties in motor: S1 duty Continues duty S2 duty short time duty S3 Intermittent duty S4 Intermittent periodic duty with starting S5 Intermittent periodic duty with starting and braking S6 Continues duty with periodic Intermittent duty S7 Continues duty with starting and braking S8 Continues duty with periodic speed changes Let […]. SPWM technique is used to control the inverter voltage. 010203040506070891011 The stator frame in an induction motor is used to provide return path for the flux. (e) Motors should be put on pallets to prevent moisture from accumulating underneath. How Does a Three Phase Induction Motor work? - Duration: 5:16. The construction of the stator and two types of rotor − squirrel cage and wound (slip-ring) one, used for three-phase Induction motor will be presented. The YB2-H series of the explosion-proof three-phase induction motors is a completely enclosed fan-cooled induction motor of the squirrel-cage type. But the rotor construction differs with respect to the type of motor. The reason I ask is because I'm researching the development of the induction motor for a project. It may be constructed for single phase, three phase or even poly phase motors. The interaction of the magnetic fields creates the torque that rotates the rotor and the load. They run at a constant speed from no-load to the full load. Each contains electrical windings that carry current and thus creates a magnetic field. 4 mm to 4 mm, depending on the power of the motor. The stator has two windings i. An induction motor, 3 phase induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. N = actual motor speed in rpm. Types of Three Phase Induction Motor Rotor with Electrical Machine, Single Phase Transformer, Construction of single Phase transformer, Losses in transformer, Open-Circuit and Short-Circuit Test, Three-Phase Transformer, Auto transformer etc. 3 Phase Induction Motor, Workshop Tools and Engineering Machines, Workshop Lab Equipments India Manufacturers, Engineering Workshop Lab Machines Manufacturers and Exporters Engineering Lab Equipments. Explain working principle of three phase induction motor: Working principle of three phase induction motor base on the electromagnetic induction. B ecause of the absence of slip rings, brushes maintenance duration and cost associated with the w ea r and tea r of brushe s are minimized. The part which rotates and is connected to the mechanical load through shaft called rotor. Squirrel cage motors The majoritory of 3-phase AC induction motors are of the squirrel cage construction. In addition, there are end bells, bearings, motor frame and other components. Three-Phase Induction Motor: These motors are self-starting and use no capacitor, start winding, centrifugal switch or other starting device. This article explains the construction, working principle of single-phase induction motors. These are of two types, squirrel cage and slip ring motors. Three-phase induction motor construction depicting the dimensions and phase configurations. The stator carries a 3-phase winding (called stator winding) while the rotor carries a short-circuited winding (called rotor winding). By induction motor, we mean that the stator windings induce a current flow in the rotor conductors, like a transformer, unlike a brushed DC commutator motor. A 3 phase induction motor derives its name from the fact that the rotor current is induced by the magnetic field, instead of electrical connections. It is mainly for electrical and Y series of coordinated series of electromagnetic brake YEJ three-phase asynchronous motors. Haselwander was the first to design a three-phase transmission system with three-phase synchronous machines and three transmission lines. The stator and rotor do the work, and the enclosure protects the stator and rotor. Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, reliable and economical. Induction motors are widely used in everything from industrial machines to home appliances because they have a simple construction without parts that experience wear from abrasion, and can be used simply by connecting them to a power source. As discussed in Chapter 16, the squirrel cage comprises the bars and. • The motor is supplied by balanced three-phase voltage at the terminals. My problem is that I need to design either a single-phase induction motor, using a capacitor design much like you mentioned above to get the phase separation, or I could buy a converter from 1PH/DC/3PH to power the windings. The most commonly used induction motor type is the three-phase motor ranging from 1 to 250 hp. A Capacitor Start Capacitor Run Induction Motor is a single phase motor consists of a stator and a single-cage rotor. The AC Motor comes in three different types known as Induction, Synchronous, and Industrial. 3 Design Description of the proposed Three phase Induction Motor with Written Pole Technology: 0. A four-phase motor has eight electromagnets arranged in four pairs, with each one separated from the next by 45 degrees. 2 kW three phase induction motors are widely used for commercial applications. Is it possible to change the direction of rotation of three phase induction motors? How? 5. The other name of induction motor is a synchronous motor. As discussed in Chapter 16, the squirrel cage comprises the bars and. An induction motor uses the principle of electromagnetic induction to cause the rotor to turn. A three-phase induction motor has two parts. supply and they are classified into synchronous, single phase and 3 phase induction, and special purpose motors. Working Principle of Three Phase Induction Motor. pptx 3 Motor Construction Stator Stator - magnetic structure (iron core) and winding that create magnetic field. than the PIC18F452 or PIC16F7X7. To control the. The rotor is separated from the stator by a small air-gap which ranges from 0. Eduction motor works on the principle of electromagnetic induction. The YB2-H series of the explosion-proof three-phase induction motors is a completely enclosed fan-cooled induction motor of the squirrel-cage type. N = actual motor speed in rpm. Smooth start up is guaranteed by variable frequency starting from a low 2. Three Phase Induction Motors Course Description: This unit is designed to be interactive and analytical, and will give the student a thorough understanding of the three phase induction motor. Stator: The stator of an induction motor is in principle, the same as that of a synchronous motor (or) generator. Large industrial motors are 3-phase. Balamurugan AP. In contrast, a brushless DC motor produces no starting torque when directly connected to fixed frequency utility power. China Y Series Three Phase Linear Induction Motor, Find details about China Induction Motor, Linear Motor from Y Series Three Phase Linear Induction Motor - Xinxiang Anlian Crane Construction Machinery Co. Single winding motors are designed for direct starting from the supply and are single voltage. Eduction motor works on the principle of electromagnetic induction. Three-phase A. 5 millimetre. Non-complex construction - they don't require permanent magnets, brushes or windings on the rotor. When a voltage is applied to the coil, current flows in the winding and flux is established, just as in the transformer. Three Phase Induction Motors: The three-phase induction motor is further classified into two types namely squirrel cage motor and slip ring induction motor. 3 Phase Induction Motor,Y Series Motor,AC Three Phase Motor(id:8952071). c motor used for industrial drives. AC-DC MOTOR OPERATION & MAINTENANCE COURSE TOPICS AC MOTORS DC MOTORS 1. The stator copper losses are 2 kW, and the rotor copper losses are 700 W. One Phase Sequence Indicator. Brush-Riding Motor. To best understand what is Model 3-worthy about the reluctance motor, we must first refresh our memories about how Tesla’s legacy 3-phase AC induction motor works (which I wrote about in some. There are mainly two types of induction motor on the basis of power supply, Single Phase Induction Motor and Three Phase Induction Motor. The stator is a tubular iron frame that consists of a laminated and slotted stator core. Squirrel cage. single phase induction motor construction. As rough estimate nearly 80% of world industrial motors are three phase induction motors and out of which more than 90% are squirrel cage induction motors. Beginningwith the highestvalueof. A motor–generator is often used in factory industrial applications. , naphthalene), while 22 five-ring and larger compounds (e. Of the two choices, the old three-phase motor makes a better selection. Compared to squirrel cage rotor the rotor construction is not simple. A 3 phase AC current passing through a Stator winding produces a rotating magnetic field. Types of the Three Phase Induction Motor. ensure complete filling of all voids thus enhancing the life of the motor. 3 phase induction motor are simple & robust in construction with high reliability factor. As previously, we have covered a lot of important topics. A single-phase induction motor needs a starter configuration to provide the starting torque while a 3-phase motor can be inherently self-starting as the different phases can be manipulated to start the rotor moving. Types of Single Phase Induction Motors. The rotor is separated from the stator by a small air-gap which ranges from 0. As in the synchronous motor, applying three-phase currents to the armature creates a synchronously-rotating magnetic field. Yes that is aluminum and it is the same principle of an induction 3 phase motor accept flattened out. • The motor is supplied by balanced three-phase voltage at the terminals. The three-phase synchronous motor is a unique and specialized motor. For many years low-voltage three-phase motors in the European Union have been sold in three efficiency classes EFF3, EFF2 and EFF1. Three phase induction motor has a stator and a rotor. In the second section, I would be throwing light on the operation and working principle of Wound Rotor Induction Motor. shunt motor can be changed smoothly just by using rheostats. Induction motor, also known as asynchronous motor, is a kind of AC electric motor. Electric current is supplied to the stator, which induces a magnetic field that rotates. 3-phase AC induction motors For industrial and mining applications, 3-phase AC induction motors are the prime movers for the vast majority of machines. Three-phase AC induction motors Construction - Three-phase AC induction motors are commonly used in industrial applications. Explain working principle of three phase induction motor: Working principle of three phase induction motor base on the electromagnetic induction. AC-DC MOTOR OPERATION & MAINTENANCE COURSE TOPICS AC MOTORS DC MOTORS 1. Although all three-phase motors operate with a similar power supply, their internal construction can vary significantly, especially that of their rotor. The principles are those that you learned in your study of alternating current. Working Principle of Three Phase Induction Motor. Modelling of the induction motor is done in stationary reference frame and the system in simulated using MATLAB (Simulink) and hardware implementation is done for the same using TIs F28069M launch pad under varying speed and load torque. The stator carries a 3-phase winding [Fig. Figures 1 and 2 illustrate the rotor construction. It covers the modern theory of induction motor applications and control methods. The stator is a stationary part, the rotor is a rotating part. The part i. V/F SPEED CONTROL FOR THREE PHASE INDUCTION MOTOR. The operating principle of a 3 phase induction motor is based on the production of r. The part i. Non-complex construction - they don't require permanent magnets, brushes or windings on the rotor. It is made up of a number of stampings, which are slotted to receive the windings. CAPACITOR-START. View product details of 3 Phase Induction Motor,Y Series Motor,AC Three Phase Motor from Fujian Dongfeng Machinery Electrical Liability CO. This is because of its very durable and robust construction. I am just interested in this concept based on lenz law and the aluminum works for this even though it is not magnetic it is conductive so copper works better but aluminum is cheaper. • Single-phase operation of three-phase induction motors: 1. In case of three phase AC operation, most widely used motor is three phase induction motor as this type of motor does not require any starting device or we can say they are self starting induction motor. In the case of a three-phase induction motor, the stator holds symmetrically distributed three-phase winding in its. China 3-phase Electric Motor manufacturers - Select 2019 high quality 3-phase Electric Motor products in best price from certified Chinese Electric Motor manufacturers, China Motor suppliers, wholesalers and factory on Made-in-China. Types of Single Phase Induction Motors. As in the synchronous motor, applying three-phase currents to the armature creates a synchronously-rotating magnetic field. FPGA and Fuzzy based Speed Control Technique for Three Phase Induction Motor - written by Dr. The stator or the stationary part consists of three phase winding held in place in the slots of a laminated steel core which is enclosed and supported by a cast. This type of motor starts as a repulsion motor and runs as an induction motor. The working principle of 3 phase induction is based on the production of rotating magnetic field. Electrical. CAPACITOR-START. Construction of 3 Phase AC Induction Motor. The stator 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. In 90% of induction motors, we can find the squirrel cage rotor. 3 phase Induction Motor runs on 3 phase AC supply. Induction motors are available in two types: single-phase (capacitor run) and three-phase induction motors. armature (stator) winding as the three-phase synchronous motor. It is mostly used in industrial drives because it is very reasonable and vigorous, economical and reliable. Three-phase AC induction motors are widely used in industrial and commercial applications. improvement in industrial three-phase induction motors, making use die cast copper rotor cage and premium electrical steel. Three Phase Induction Motors - ConstructionA 3-phase induction motor has two main parts (i. Each contains electrical windings that carry current and thus creates a magnetic field. 3), capacitor start, capacitor start/capacitor run, shaded pole, repulsion start, and universal. The rotor carries a three phase star or delta connected, distributed winding, wound for same number of poles as that of stator. Induction motors mainly consists of two types rotors which are - wound rotor and squirrel cage rotor with similar stator construction. In this article, we shall discuss what are the types of single-phase induction motor, construction, working, starting methods, disadvantages. Initial Data. 3 phase induction motors are extensively used for various industrial applications because of their following advantages - • They have very simple and rugged (almost unbreakable) construction • They are very reliable and having low cost • They have high efficiency and good power factor • Minimum. The shortest possible answer to the question of why Tesla Motors uses a 3-phase 4-pole AC induction motor to power all its cars is of course "because. 0 output pole 6 frame size 445t 230/460 enclosure tefc catalog# qt1006 time rating cont. You can avoid condensation problems in motors by maintaining a winding temperature 5 [degrees] C to 10 [degrees] C above the surrounding air temperature. By induction motor, we mean that the stator windings induce a current flow in the rotor conductors, like a transformer, unlike a brushed DC commutator motor. -phase Induction Machines Dr. The windings are supplied by a balanced three phase a. CM29G) Three-phase/two-speed Dahlander motor For 400 V mains supply •LEROY' ISOMBl. The equivalent circuit of the single-phase induction motor. condition of motor (iii) Operation of three phase induction motor by single phase supply with the help of capacitor phase converter. It is most popularly used motors in many applications. The three phase induction motor is the most widely popular used electrical motor. In simple words, the type of 3 phase induction motor which uses a squirrel cage rotor is called squirrel cage induction motor. The speed control of induction motor is done at the cost of decrease in efficiency and low electrical power factor. Its characteristic features are-Simple and rugged construction Low cost and minimum maintenance High reliability and sufficiently high efficiency Needs no extra starting motor and need not be synchronized. Three-phase AC induction motors are widely used in industrial and commercial applications. Induction Motor, 3 Phase Motor, Industrial Motor manufacturer / supplier in China, offering 3 Phase Induction Motor Applications in Industries, Siemens and Sew Parallel Shaft Helical Geared Motors, Siemens and Sew Helical Worm Geared Motors and so on. Single phase induction motors are used primarily for domestic and light-industrial applications where three-phase supply is generally not available. The rotor carries a three phase star or delta connected, distributed winding, wound for same number of poles as that of stator. Record all nameplate information for the induction motor. The loss of current through one phase of a 3 phase supply is described as single phasing in three phase induction motors. In addition, there are end bells, bearings, motor frame and other components. The direction of rotation of a 3 phase induction motor can be reversed by interchanging any two of the three motor supply lines. A 3 phase induction motor can be used for different applications with various speed and load requirements. Depending on the stator windings, these can be configured as single-phase, two-phase, or three-phase motors. On this topic, I will explain in details about 3 phase induction motor construction … before we talked about parts of the electric motor generally … but on this topic, we will go deep for 3 phase induction motor construction only. The motor is controlled using 3-phase inverter. Slip ring Induction Motors. Calculation of Motor Performance. Re: Resistance value of 10HP , 3 phase , 415v , 50hz , induction motor 02/06/2010 2:39 AM When you connect a multimeter (with selection for resistance measurement) across any element to measure resistance, what the multimeter does is the same thing that you have explained. DC MOTOR NAMEPLATES 2. Three-phase AC induction motors Construction - Three-phase AC induction motors are commonly used in industrial applications. 1 Single phase induction motor. Three-phase induction motor construction depicting the dimensions and phase configurations. improvement in industrial three-phase induction motors, making use die cast copper rotor cage and premium electrical steel. Requires less maintenance and rugged construction. Three Phase Induction Motor: A 3-phase induction motor is widely used electric motors in industry. Three phase induction motors are one of the most widely used industrial machines. What is the Three Phase induction motor Working Principle? Like any electric motor, a 3-phase induction motor has a stator and rotor. Suad Ibrahim Shahl. A Capacitor Start Capacitor Run Induction Motor is a single phase motor consists of a stator and a single-cage rotor. It has a stator and a rotor. This type of motor does not require any devices for starting. Always the stator and rotor is separated with a small air gap ranging from 0. This effect causes rotation of three phase induction motor. If you want to get the three phase induction motor then get in touch with us at https://bit. The speed control of induction motor is a crying need for the real world industrial applications. Some types of single-phase motors can be used, but three-phase motors are usually but three-phase induction motors are suitable for most purposes and are and switching between manual speed adjustment and automatic control from an With a four-quadrant rectifier (active front-. They really need the aid of an inverter whose “phase” is maintained in step with the angular position of the rotor. As you can see, there are several varieties of AC motors. EEE Page 9 Slip. Construction of Induction Motor The three phase induction motor is a preferable type of motor. Draw the torque-speed characteristic of a three-phase induction motor and. As in squirrel-cage induction motors, the speed of a synchronous motor is determined by the number of pairs of poles and the line frequency. The dynamic model of the induction motor is derived by transferring the three-phase quantities into two phase direct and quadrature axes quantities. The construction of the poles is such that they give a sweep to the. Types of the Three Phase Induction Motor. 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. Each consisting of a number of coil windings are connected in series and produce the required number of poles perfasa, Figure 2-4, shows the stator and rotor cage construction. The three phase stator winding is connected in star or delta. single-phase motor are discussed. You will be using the Lab-Volt Trainer Model no 8020. It is mostly used in industrial drives because it is very reasonable and vigorous, economical and reliable. In case of three phase AC operation, most widely used motor is Three phase induction motor as this type of motor does not require any starting device or we can say they are self starting induction motor. 3 Three-phase motors ranging from 1 to 250 hp. As shown in equation , the developed torque depends on the air gap power and synchronous speed. It is made up of a number of stampings, which are slotted to receive the windings. A majority of three-phase induction motors operate with their stator windings connected directly to a three-phase electric supply of constant voltage and. Shaded pole induction motor; 2. Factory fitted and aligned brake motors. Generally, two types of induction motors are used in our industry such as wound rotor and squirrel cage rotor, but their faults are almost same. The speed control of induction motor is a crying need for the real world industrial applications. Construction of 3 Phase AC Induction Motor. Operation of Induction motors. In the second section, I would be throwing light on the operation and working principle of Wound Rotor Induction Motor. However, they achieve a lower power density. Electrical. Stator Core. China Big Size Three Phase Squirrel Cage Asynchronous Induction AC Motor, Find details about China Asynchronous Motor, Induction Motor from Big Size Three Phase Squirrel Cage Asynchronous Induction AC Motor - Shanghai Fortune Electric Co. For 3-phase AC motors operating in damp. Three-phase power is most common in industrial settings, or where more power is needed to operate heavy machinery, though there are exceptions. The stator carries a 3-phase winding (called stator winding) while the rotor carries a short-circuited winding (called rotor winding). Usually an induction motor draws 5 to 7 times its rated current during starting before the speed builds up and the current is modified by the back EMF. These two parts are stator and rotor.